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IP6 Address



 
 
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  #1  
Old December 13th 18, 07:33 PM posted to alt.windows7.general
David E. Ross[_2_]
external usenet poster
 
Posts: 1,035
Default IP6 Address

Can someone explain why my modem and ipconfig give me two different IP6
addresses?
2605:e000:141e:c49f:8d8a:a676:3154:e70f (IP6) per IPConfig
2605:e000:c04:7b:e855:8b57:644f:706d (IP6) per modem

--
David E. Ross
http://www.rossde.com/

"President Donald Trump said on Tuesday [11 December] that
U.S. authorities had 'caught 10 terrorists', ... but four
government sources said there was no recent evidence of terrorism
suspects being caught along the border." Reuters News

I think Trump is the primary source of the fake news he condemns.
Ads
  #2  
Old December 14th 18, 12:44 AM posted to alt.windows7.general
VanguardLH[_2_]
external usenet poster
 
Posts: 10,881
Default IP6 Address

David E. Ross wrote:

Can someone explain why my modem and ipconfig give me two different IP6
addresses?
2605:e000:141e:c49f:8d8a:a676:3154:e70f (IP6) per IPConfig
2605:e000:c04:7b:e855:8b57:644f:706d (IP6) per modem


When logging into the web server internal to the modem to look at
devices, are you looking at the LAN-side (aka intranet) IPv6 address the
modem's DHCP server assigned to the device (or what the router reports
if the host uses if using static addressing), or are you looking at its
WAN-side IP address (the public address that all external/Intranet hosts
will see)?

https://www.google.com/search?q=what%27s+my+ip+address

Does that public IP address match on either the IPv6 addresses you noted
above? If so, that's the WAN-side IPv6 address of your router, not the
LAN-side IPv6 address of your intranet host.

When I go into my modem and click on the device listing for my host, its
IPv6 address, local link IPv6 address, and MAC/physical address match
what "ipconfig /all" reports on my host.

Do you have multiple NICs in your host? I don't have bother Ethernet
(wired) and wi-fi in my host, so I can't see how the modem reports the
different IP and MAC addresses for each NIC but I assume they would be
different. The PC came with a wi-fi daughtercard but I removed it
because it's a desktop, doesn't move, I prefer the simplicity and
security of a wired connection, and anything wireless that wants to
connect to my PC can do it through a wi-fi connect through the modem.
  #3  
Old December 14th 18, 09:38 AM posted to alt.windows7.general
Nil[_5_]
external usenet poster
 
Posts: 1,731
Default IP6 Address

KenW Wrote in message:
On Thu, 13 Dec 2018 10:33:00 -0800, "David E. Ross"
wrote:

Can someone explain why my modem and ipconfig give me two different IP6
addresses?
2605:e000:141e:c49f:8d8a:a676:3154:e70f (IP6) per IPConfig
2605:e000:c04:7b:e855:8b57:644f:706d (IP6) per modem


How does anyone knew what he was BRIEFED on or what he was told ? You
that pick on Trump should be shot.


KenW


Are you having a mental breakdown? If so, you should be shot.

--


----Android NewsGroup Reader----
http://usenet.sinaapp.com/
  #4  
Old December 14th 18, 10:04 AM posted to alt.windows7.general
Paul[_32_]
external usenet poster
 
Posts: 11,873
Default IP6 Address

Nil wrote:
KenW Wrote in message:
On Thu, 13 Dec 2018 10:33:00 -0800, "David E. Ross"
wrote:

Can someone explain why my modem and ipconfig give me two different IP6
addresses?
2605:e000:141e:c49f:8d8a:a676:3154:e70f (IP6) per IPConfig
2605:e000:c04:7b:e855:8b57:644f:706d (IP6) per modem

How does anyone knew what he was BRIEFED on or what he was told ? You
that pick on Trump should be shot.


KenW


Are you having a mental breakdown? If so, you should be shot.


https://www.reuters.com/article/us-u...-idUSKBN1OB05Y

"President Donald Trump said on Tuesday that U.S. authorities
had “caught 10 terrorists,” citing it as a reason for why
the United States should build a wall on its Mexican border, but

four government sources ===

said there was no recent evidence of terrorism suspects being
caught along the border.
"

My guess is, rogue strawberry pickers.

They're the worst.

Paul
  #5  
Old December 14th 18, 04:22 PM posted to alt.windows7.general
Rene Lamontagne
external usenet poster
 
Posts: 2,549
Default IP6 Address

On 12/14/2018 3:04 AM, Paul wrote:
Nil wrote:
KenW***************** Wrote in message:
On Thu, 13 Dec 2018 10:33:00 -0800, "David E. Ross"
wrote:

Can someone explain why my modem and ipconfig give me two different IP6
addresses?
2605:e000:141e:c49f:8d8a:a676:3154:e70f (IP6) per IPConfig
2605:e000:c04:7b:e855:8b57:644f:706d (IP6) per modem
How does anyone knew what he was BRIEFED on or what he was told ? You
that pick on Trump should be shot.


KenW


Are you having a mental breakdown? If so,* you should be shot.


https://www.reuters.com/article/us-u...-idUSKBN1OB05Y


** "President Donald Trump said on Tuesday that U.S. authorities
*** had “caught 10 terrorists,” citing it as a reason for why
*** the United States should build a wall on its Mexican border, but

***** four government sources*** ===

*** said there was no recent evidence of terrorism suspects being
*** caught along the border.
** "

My guess is, rogue strawberry pickers.

They're the worst.

** Paul


Especially the toddlers, Trump was scared they might eat a couple of his
strawberries.

Rene

  #6  
Old December 14th 18, 07:56 PM posted to alt.windows7.general
David E. Ross[_2_]
external usenet poster
 
Posts: 1,035
Default IP6 Address

On 12/13/2018 3:44 PM, VanguardLH wrote:
David E. Ross wrote:

Can someone explain why my modem and ipconfig give me two different IP6
addresses?
2605:e000:141e:c49f:8d8a:a676:3154:e70f (IP6) per IPConfig
2605:e000:c04:7b:e855:8b57:644f:706d (IP6) per modem


When logging into the web server internal to the modem to look at
devices, are you looking at the LAN-side (aka intranet) IPv6 address the
modem's DHCP server assigned to the device (or what the router reports
if the host uses if using static addressing), or are you looking at its
WAN-side IP address (the public address that all external/Intranet hosts
will see)?

https://www.google.com/search?q=what%27s+my+ip+address

Does that public IP address match on either the IPv6 addresses you noted
above? If so, that's the WAN-side IPv6 address of your router, not the
LAN-side IPv6 address of your intranet host.

When I go into my modem and click on the device listing for my host, its
IPv6 address, local link IPv6 address, and MAC/physical address match
what "ipconfig /all" reports on my host.

Do you have multiple NICs in your host? I don't have bother Ethernet
(wired) and wi-fi in my host, so I can't see how the modem reports the
different IP and MAC addresses for each NIC but I assume they would be
different. The PC came with a wi-fi daughtercard but I removed it
because it's a desktop, doesn't move, I prefer the simplicity and
security of a wired connection, and anything wireless that wants to
connect to my PC can do it through a wi-fi connect through the modem.


Configuration:
Windows 7 Ultimate SP1 (x64)
Motorola MB7220 V1.0 cable modem with firmware version 7220-5.7.1.9
Modem accessed through a Netgear N300 Wireless Router WNR2000v5

When I logon to the modem and request the advanced display, I can see
the following:
IPv6 Address 2605:e000:c04:7b:e855:8b57:644f:706d

Selecting the circled "i" for more information, I get:
IPv6 Address:
Assigned to your cable modem by your cable provider. The assignment is
referred to as a Lease.
IPv6 is a newer, longer style of IP Address. Your cable provider may
assign an IPv4 Address, an IPv6 Address, or both.

Note: Both IP6 addresses are "owned" by Spectrum, which is my ISP for
connecting to the Internet. (When connected, I use a different ISP for
E-mail and hosting my Web site.)

--
David E. Ross
http://www.rossde.com/

"President Donald Trump said on Tuesday [11 December] that
U.S. authorities had 'caught 10 terrorists', ... but four
government sources said there was no recent evidence of terrorism
suspects being caught along the border." Reuters News

I think Trump is the primary source of the fake news he condemns.
  #7  
Old December 15th 18, 12:07 AM posted to alt.windows7.general
VanguardLH[_2_]
external usenet poster
 
Posts: 10,881
Default IP6 Address

David E. Ross wrote:

On 12/13/2018 3:44 PM, VanguardLH wrote:
David E. Ross wrote:

Can someone explain why my modem and ipconfig give me two different IP6
addresses?
2605:e000:141e:c49f:8d8a:a676:3154:e70f (IP6) per IPConfig
2605:e000:c04:7b:e855:8b57:644f:706d (IP6) per modem


When logging into the web server internal to the modem to look at
devices, are you looking at the LAN-side (aka intranet) IPv6 address the
modem's DHCP server assigned to the device (or what the router reports
if the host uses if using static addressing), or are you looking at its
WAN-side IP address (the public address that all external/Intranet hosts
will see)?

https://www.google.com/search?q=what%27s+my+ip+address

Does that public IP address match on either the IPv6 addresses you noted
above? If so, that's the WAN-side IPv6 address of your router, not the
LAN-side IPv6 address of your intranet host.

When I go into my modem and click on the device listing for my host, its
IPv6 address, local link IPv6 address, and MAC/physical address match
what "ipconfig /all" reports on my host.

Do you have multiple NICs in your host? I don't have bother Ethernet
(wired) and wi-fi in my host, so I can't see how the modem reports the
different IP and MAC addresses for each NIC but I assume they would be
different. The PC came with a wi-fi daughtercard but I removed it
because it's a desktop, doesn't move, I prefer the simplicity and
security of a wired connection, and anything wireless that wants to
connect to my PC can do it through a wi-fi connect through the modem.


Configuration:
Windows 7 Ultimate SP1 (x64)
Motorola MB7220 V1.0 cable modem with firmware version 7220-5.7.1.9
Modem accessed through a Netgear N300 Wireless Router WNR2000v5

When I logon to the modem and request the advanced display, I can see
the following:
IPv6 Address 2605:e000:c04:7b:e855:8b57:644f:706d

Selecting the circled "i" for more information, I get:
IPv6 Address:
Assigned to your cable modem by your cable provider. The assignment is
referred to as a Lease.
IPv6 is a newer, longer style of IP Address. Your cable provider may
assign an IPv4 Address, an IPv6 Address, or both.

Note: Both IP6 addresses are "owned" by Spectrum, which is my ISP for
connecting to the Internet. (When connected, I use a different ISP for
E-mail and hosting my Web site.)


I'm assuming from your description that you have a separate router and
cable modem, not a combination modem that has a built-in router. If
they are separate, you have the config without the enclosing "combo".

.-----------combo(router+modem)------------.
|.-----router-----. |
host:IP---||--LANsideIP | .------modem------.|
|| WANsideIP --|---|---WANsideIP ||
|'----------------' | ISPsideIP --||---ISP
| '-----------------'|
'------------------------------------------'

There's the IP address of your intranet host.
There's the IP address on the LAN-side of your router.
There's the IP address on the WAN-side of your router. (*)
There's the IP address on the WAN-side of the modem. (*)
There's the IP address on the ISP-side of the modem.
(*) You won't see this in a combo (router+modem).

Unless you configured your host with a static IP address, it is
dynamically assigned by the DHCP server internal to the router. The
router's WAN-side IP address gets dynamically assigned by the modem's
internal DHCP server. The ISP-side IP address for the modem gets
assigned by your ISP's DHCP server.

I found your cable modem at with pics:

https://www.amazon.com/MOTOROLA-Cert.../dp/B019ZY1ZWS

The backside has only 1 Ethernet port, so it is usable with only a
single intranet host or you connect it to a router to hookup multiple
intranet hosts. Since it appears you are using a separate router, my
guess is:

- The WAN-side IP address of your router comes from the cable modem's
internal DHCP server.
- The ISP-side IP address of the cable modem comes from the ISP's DHCP
server.
- Both those IP addresses come from your ISP's IP pool.
- They need not be the same. The cable modem's IP address allows tech
to access the cable modem, like when provisioning it, not something
beyond it. They probably don't care/support what you have on the other
side of their modem.

Since the router and modem are separate network devices, they each need
an IP address on their interface to connect to each other. The WAN-side
IP address of the router connects to the WAN-side IP address of the
modem.

..---router----.
|--LANsideIP | .----modem----.
| WANsideIP--|---|--WANsideIP |
'-------------' |ISPsideIP --|
'-------------'

Does your router report the modem's WAN-side IP address? If your router
is configured for dynamic IP address assigned (from the modem's internal
DHCP server), it should list what is its "gateway" IP address (where to
find the modem but its IP address).
  #8  
Old December 15th 18, 02:29 AM posted to alt.windows7.general
David E. Ross[_2_]
external usenet poster
 
Posts: 1,035
Default IP6 Address

On 12/14/2018 3:07 PM, VanguardLH wrote:
David E. Ross wrote:

On 12/13/2018 3:44 PM, VanguardLH wrote:
David E. Ross wrote:

Can someone explain why my modem and ipconfig give me two different IP6
addresses?
2605:e000:141e:c49f:8d8a:a676:3154:e70f (IP6) per IPConfig
2605:e000:c04:7b:e855:8b57:644f:706d (IP6) per modem

When logging into the web server internal to the modem to look at
devices, are you looking at the LAN-side (aka intranet) IPv6 address the
modem's DHCP server assigned to the device (or what the router reports
if the host uses if using static addressing), or are you looking at its
WAN-side IP address (the public address that all external/Intranet hosts
will see)?

https://www.google.com/search?q=what%27s+my+ip+address

Does that public IP address match on either the IPv6 addresses you noted
above? If so, that's the WAN-side IPv6 address of your router, not the
LAN-side IPv6 address of your intranet host.

When I go into my modem and click on the device listing for my host, its
IPv6 address, local link IPv6 address, and MAC/physical address match
what "ipconfig /all" reports on my host.

Do you have multiple NICs in your host? I don't have bother Ethernet
(wired) and wi-fi in my host, so I can't see how the modem reports the
different IP and MAC addresses for each NIC but I assume they would be
different. The PC came with a wi-fi daughtercard but I removed it
because it's a desktop, doesn't move, I prefer the simplicity and
security of a wired connection, and anything wireless that wants to
connect to my PC can do it through a wi-fi connect through the modem.


Configuration:
Windows 7 Ultimate SP1 (x64)
Motorola MB7220 V1.0 cable modem with firmware version 7220-5.7.1.9
Modem accessed through a Netgear N300 Wireless Router WNR2000v5

When I logon to the modem and request the advanced display, I can see
the following:
IPv6 Address 2605:e000:c04:7b:e855:8b57:644f:706d

Selecting the circled "i" for more information, I get:
IPv6 Address:
Assigned to your cable modem by your cable provider. The assignment is
referred to as a Lease.
IPv6 is a newer, longer style of IP Address. Your cable provider may
assign an IPv4 Address, an IPv6 Address, or both.

Note: Both IP6 addresses are "owned" by Spectrum, which is my ISP for
connecting to the Internet. (When connected, I use a different ISP for
E-mail and hosting my Web site.)


I'm assuming from your description that you have a separate router and
cable modem, not a combination modem that has a built-in router. If
they are separate, you have the config without the enclosing "combo".

.-----------combo(router+modem)------------.
|.-----router-----. |
host:IP---||--LANsideIP | .------modem------.|
|| WANsideIP --|---|---WANsideIP ||
|'----------------' | ISPsideIP --||---ISP
| '-----------------'|
'------------------------------------------'

There's the IP address of your intranet host.
There's the IP address on the LAN-side of your router.
There's the IP address on the WAN-side of your router. (*)
There's the IP address on the WAN-side of the modem. (*)
There's the IP address on the ISP-side of the modem.
(*) You won't see this in a combo (router+modem).

Unless you configured your host with a static IP address, it is
dynamically assigned by the DHCP server internal to the router. The
router's WAN-side IP address gets dynamically assigned by the modem's
internal DHCP server. The ISP-side IP address for the modem gets
assigned by your ISP's DHCP server.

I found your cable modem at with pics:

https://www.amazon.com/MOTOROLA-Cert.../dp/B019ZY1ZWS

The backside has only 1 Ethernet port, so it is usable with only a
single intranet host or you connect it to a router to hookup multiple
intranet hosts. Since it appears you are using a separate router, my
guess is:

- The WAN-side IP address of your router comes from the cable modem's
internal DHCP server.
- The ISP-side IP address of the cable modem comes from the ISP's DHCP
server.
- Both those IP addresses come from your ISP's IP pool.
- They need not be the same. The cable modem's IP address allows tech
to access the cable modem, like when provisioning it, not something
beyond it. They probably don't care/support what you have on the other
side of their modem.

Since the router and modem are separate network devices, they each need
an IP address on their interface to connect to each other. The WAN-side
IP address of the router connects to the WAN-side IP address of the
modem.

.---router----.
|--LANsideIP | .----modem----.
| WANsideIP--|---|--WANsideIP |
'-------------' |ISPsideIP --|
'-------------'

Does your router report the modem's WAN-side IP address? If your router
is configured for dynamic IP address assigned (from the modem's internal
DHCP server), it should list what is its "gateway" IP address (where to
find the modem but its IP address).


It is almost dinner time. After dinner, I will reconfigure to have my
PC connect directly to the modem without the router. That can be only
temporary because my wife's PC also connects to the router to reach the
modem and then to the Internet. This is described at
http://www.rossde.com/computer/LAN.html.

I generally avoid combination devices -- router-modem, printer-scanner,
etc -- because subcomponents rarely fail together. I am concerned that
Southern California Edison's momentary spike might cause only the router
part of a router-modem to fail. If that happens with separate modem and
router, I could still connect directly to the modem until I can replace
the router. This indeed happened.

--
David E. Ross
http://www.rossde.com/

"President Donald Trump said on Tuesday [11 December] that
U.S. authorities had 'caught 10 terrorists', ... but four
government sources said there was no recent evidence of terrorism
suspects being caught along the border." Reuters News

I think Trump is the primary source of the fake news he condemns.
  #9  
Old December 15th 18, 04:16 AM posted to alt.windows7.general
David E. Ross[_2_]
external usenet poster
 
Posts: 1,035
Default IP6 Address

On 12/14/2018 5:29 PM, I previously wrote:
It is almost dinner time. After dinner, I will reconfigure to have my
PC connect directly to the modem without the router. That can be only
temporary because my wife's PC also connects to the router to reach the
modem and then to the Internet. This is described at
http://www.rossde.com/computer/LAN.html.

I generally avoid combination devices -- router-modem, printer-scanner,
etc -- because subcomponents rarely fail together. I am concerned that
Southern California Edison's momentary spike might cause only the router
part of a router-modem to fail. If that happens with separate modem and
router, I could still connect directly to the modem until I can replace
the router. This indeed happened.


Oops! The modem only accepts outgoing ethernet cable while the PCs are
connected to the router with USB LAN cables. I have a long ethernet
cable I can run from the modem to my PC. Since the modem and router are
in the attic, however, that is something I have to wait until daylight
to try (maybe Sunday).

--
David E. Ross
http://www.rossde.com/

"President Donald Trump said on Tuesday [11 December] that
U.S. authorities had 'caught 10 terrorists', ... but four
government sources said there was no recent evidence of terrorism
suspects being caught along the border." Reuters News

I think Trump is the primary source of the fake news he condemns.
  #10  
Old December 15th 18, 05:55 PM posted to alt.windows7.general
Mark Lloyd[_2_]
external usenet poster
 
Posts: 1,756
Default IP6 Address

On 12/14/18 7:29 PM, David E. Ross wrote:

[snip]

I generally avoid combination devices -- router-modem, printer-scanner,
etc -- because subcomponents rarely fail together. I am concerned that
Southern California Edison's momentary spike might cause only the router
part of a router-modem to fail. If that happens with separate modem and
router, I could still connect directly to the modem until I can replace
the router. This indeed happened.


A printer-scanner does make it easy to make copies.

Other than that, I avoid combination devices too, ESPECIALLY modem
router. A modem (I have cable) is under the control of your ISP. A
router is a part of YOUR network, and the ISP shouldn't have anything to
do with that.

--
11 days until the winter celebration (Tue Dec 25, 2018 12:00:00 AM for 1
day).

Mark Lloyd
http://notstupid.us/

"SENILE.COM found. Out Of Memory."
  #11  
Old December 15th 18, 06:47 PM posted to alt.windows7.general
Ken Blake[_5_]
external usenet poster
 
Posts: 2,221
Default IP6 Address

On Sat, 15 Dec 2018 10:55:29 -0600, Mark Lloyd
wrote:


On 12/14/18 7:29 PM, David E. Ross wrote:

[snip]


I generally avoid combination devices -- router-modem, printer-scanner,
etc -- because subcomponents rarely fail together. I am concerned that
Southern California Edison's momentary spike might cause only the router
part of a router-modem to fail. If that happens with separate modem and
router, I could still connect directly to the modem until I can replace
the router. This indeed happened.


A printer-scanner does make it easy to make copies.



Not for me. My scanner software (Canon) has a setting for making
copies, and it goes straight from the scanner to my default printer.




Other than that, I avoid combination devices too, ESPECIALLY modem
router. A modem (I have cable) is under the control of your ISP. A
router is a part of YOUR network, and the ISP shouldn't have anything to
do with that.




I avoid and recommend against *all* combination devices. If one part
of a combination device fails, I don't want to have replace all parts.

The only exception for my recommendation against them is for someone
who has very little desk space for his equipment. For someone like
that, a combo printer-scanner and combo router-modem might make sense.
  #12  
Old December 15th 18, 07:51 PM posted to alt.windows7.general
Char Jackson
external usenet poster
 
Posts: 10,449
Default IP6 Address

On Fri, 14 Dec 2018 19:16:17 -0800, "David E. Ross"
wrote:

On 12/14/2018 5:29 PM, I previously wrote:
It is almost dinner time. After dinner, I will reconfigure to have my
PC connect directly to the modem without the router. That can be only
temporary because my wife's PC also connects to the router to reach the
modem and then to the Internet. This is described at
http://www.rossde.com/computer/LAN.html.


Oops! The modem only accepts outgoing ethernet cable


To put it another way, the modem has a single LAN-side Ethernet port and
a single WAN-side coax connector. Both are bidirectional, as they would
have to be.

while the PCs are connected to the router with USB LAN cables.


USB LAN cables? Do you mean USB-to-Ethernet adapters, like this?
https://www.amazon.com/Cable-Matters.../dp/B00ET4KHJ2

If not, what's a USB LAN cable? Anyway, it probably doesn't matter since
you're connected to the router via Ethernet and the router is connected
to the modem via Ethernet, so it all becomes pretty simple, as I'll
describe below.

I have a long ethernet
cable I can run from the modem to my PC. Since the modem and router are
in the attic, however, that is something I have to wait until daylight
to try (maybe Sunday).


It's probably much easier than that. There should be no need to run a
second cable. Go to the router and determine which LAN Ethernet cable is
coming from your PC. Disconnect that cable from the router. Disconnect
the Ethernet cable from the modem. Plug in 'your' Ethernet cable
directly to the modem. Now you're connected directly to the modem,
bypassing the router. Do the reverse to put it all back how it was.

You'll have to power cycle the modem so it can learn your MAC address,
and I recommend power cycling your PC, as well, although "ipconfig
/release /renew" should also do the trick.

--

Char Jackson
  #13  
Old December 15th 18, 09:17 PM posted to alt.windows7.general
Char Jackson
external usenet poster
 
Posts: 10,449
Default IP6 Address

On Fri, 14 Dec 2018 17:07:18 -0600, VanguardLH wrote:

David E. Ross wrote:

On 12/13/2018 3:44 PM, VanguardLH wrote:
David E. Ross wrote:

Can someone explain why my modem and ipconfig give me two different IP6
addresses?
2605:e000:141e:c49f:8d8a:a676:3154:e70f (IP6) per IPConfig
2605:e000:c04:7b:e855:8b57:644f:706d (IP6) per modem

When logging into the web server internal to the modem to look at
devices, are you looking at the LAN-side (aka intranet) IPv6 address the
modem's DHCP server assigned to the device (or what the router reports
if the host uses if using static addressing), or are you looking at its
WAN-side IP address (the public address that all external/Intranet hosts
will see)?

https://www.google.com/search?q=what%27s+my+ip+address

Does that public IP address match on either the IPv6 addresses you noted
above? If so, that's the WAN-side IPv6 address of your router, not the
LAN-side IPv6 address of your intranet host.

When I go into my modem and click on the device listing for my host, its
IPv6 address, local link IPv6 address, and MAC/physical address match
what "ipconfig /all" reports on my host.

Do you have multiple NICs in your host? I don't have bother Ethernet
(wired) and wi-fi in my host, so I can't see how the modem reports the
different IP and MAC addresses for each NIC but I assume they would be
different. The PC came with a wi-fi daughtercard but I removed it
because it's a desktop, doesn't move, I prefer the simplicity and
security of a wired connection, and anything wireless that wants to
connect to my PC can do it through a wi-fi connect through the modem.


Configuration:
Windows 7 Ultimate SP1 (x64)
Motorola MB7220 V1.0 cable modem with firmware version 7220-5.7.1.9
Modem accessed through a Netgear N300 Wireless Router WNR2000v5

When I logon to the modem and request the advanced display, I can see
the following:
IPv6 Address 2605:e000:c04:7b:e855:8b57:644f:706d

Selecting the circled "i" for more information, I get:
IPv6 Address:
Assigned to your cable modem by your cable provider. The assignment is
referred to as a Lease.
IPv6 is a newer, longer style of IP Address. Your cable provider may
assign an IPv4 Address, an IPv6 Address, or both.

Note: Both IP6 addresses are "owned" by Spectrum, which is my ISP for
connecting to the Internet. (When connected, I use a different ISP for
E-mail and hosting my Web site.)


I'm assuming from your description that you have a separate router and
cable modem, not a combination modem that has a built-in router. If
they are separate, you have the config without the enclosing "combo".

.-----------combo(router+modem)------------.
|.-----router-----. |
host:IP---||--LANsideIP | .------modem------.|
|| WANsideIP --|---|---WANsideIP ||
|'----------------' | ISPsideIP --||---ISP
| '-----------------'|
'------------------------------------------'

There's the IP address of your intranet host.
There's the IP address on the LAN-side of your router.
There's the IP address on the WAN-side of your router. (*)
There's the IP address on the WAN-side of the modem. (*)
There's the IP address on the ISP-side of the modem.
(*) You won't see this in a combo (router+modem).


If I may nitpick just a bit, everything stated above is correct except
that the modem also has a LANside and a WANside, rather than a WANside
and an ISPside. (WANside and ISPside would refer to the same interface
and are thus redundant.)

Also, while the modem does have an IP address for its LANside interface
and another IP address for its WANside interface, those IP addresses are
not used to handle customer traffic. The modem's LANside IP address only
connects to a web server interface, while the modem's WANside IP address
can be used by the ISP to connect to a web server interface (different
from the web server on the LANside), as well as some combination of
TFTP, SNMP, SSH, and Telnet. TFTP is always included, (required by the
DOCSIS standard and how the ISP delivers the modem's config file on
every modem boot), while the rest can vary with the specific modem
model.

From the perspective of the customer's Internet traffic, inbound or
outbound, the modem is mostly an Ethernet bridge, and thus transparent.
Since it operates at OSI Layer 2 (MAC layer), versus Layer 3 (IP layer),
IP addresses don't come into play. It's also why you'll see that the
router's gateway IP is an interface on the ISP's CMTS and not an
interface on the cable modem.

Unless you configured your host with a static IP address, it is
dynamically assigned by the DHCP server internal to the router.


Correct.

The
router's WAN-side IP address gets dynamically assigned by the modem's
internal DHCP server.


No, the modem does have a DHCP server, but it gets disabled during modem
startup. The router's WANside IP address (this is the Internet-facing
interface) gets assigned by the ISPs CMTS, the same CMTS (usually) that
becomes the router's next-hop gateway.

The ISP-side IP address for the modem gets
assigned by your ISP's DHCP server.


Actually, that too is assigned by the CMTS, (the CMTS is very
DHCP-like), but it doesn't matter because the customer usually can't
determine what that address is, and even if they could, they couldn't
make use of it in any way. It's only there to allow the ISP to have
admin access to the modem from the WANside. Any other access is blocked
by policy.

Speaking of modem IP's, the modem's LANside IP address is hardcoded. It
doesn't get assigned by DHCP or CMTS, it's simply hardcoded by the modem
manufacturer into the modem's non-volatile config. Most modem makers
have settled on 192.168.100.1 as their hardcoded LANside IP address,
which works fine in every case except where the LAN is using
192.168.100.0/24 as its address scheme. In that case, everything will
still be fine, except that you won't be able to access the modem's
LANside web server if you use a router. The reason is probably obvious.

I found your cable modem at with pics:

https://www.amazon.com/MOTOROLA-Cert.../dp/B019ZY1ZWS

The backside has only 1 Ethernet port, so it is usable with only a
single intranet host


Usually the case, but not strictly true. It used to be more common than
it is now, but ISPs can assign a service profile that allows more than
one routable IP address to be assigned from the CMTS. You'll usually see
it in the modem config as the parameter "CPE Allowed: 2", which means
the modem and one host, but there are service plans with a value of 3 or
5 that I know of, and possibly others that I haven't seen. When the CPE
value is greater than 2, you can simply connect an Ethernet switch to
the modem's single Ethernet port and all of the connected hosts, up to
the CPE limit -1, will obtain a routable IP address from the CMTS.

Side note regarding the point about "CPE Allowed" being greater than 2.
You'd expect multiple hosts to pull down routable IPs from the same
subnet, so that file sharing is easy and efficient, but the CMTS has no
concept of multiple hosts at the same physical location, so you'd be
just as likely to pull down routable IPs from different subnets. In that
case, traffic from one host goes out through the modem to the CMTS or
edge router, makes a hairpin turn and comes back through the modem to
the other host. That wasn't a great situation, but it was wholly
alleviated as consumer routers came onto the scene.

or you connect it to a router to hookup multiple
intranet hosts. Since it appears you are using a separate router, my
guess is:

- The WAN-side IP address of your router comes from the cable modem's
internal DHCP server.


As stated above, it's actually assigned by the ISPs CMTS. The cable
modem's DHCP server is disabled during modem startup.

- The ISP-side IP address of the cable modem comes from the ISP's DHCP
server.


Actually the CMTS, but I agree, it's very similar to DHCP.

- Both those IP addresses come from your ISP's IP pool.


The first will be routable, while the second _may_ be routable. I have
diminished respect for ISPs that use routable IPs on the WANside of
their cable modems. That's just wasteful. Non-routable IPs would work
just as well, but inertia prevents them from making the change. Spectrum
is one of the offenders, for example.

- They need not be the same.


They're never the same. They can't be.

The cable modem's IP address allows tech
to access the cable modem, like when provisioning it, not something
beyond it. They probably don't care/support what you have on the other
side of their modem.


Agreed.

Since the router and modem are separate network devices, they each need
an IP address on their interface to connect to each other. The WAN-side
IP address of the router connects to the WAN-side IP address of the
modem.


What you meant to say was that the WANside of the router connects to the
LANside (not WANside) of the modem, but as stated above, that's not
correct from a networking perspective. The modem behaves exactly like an
Ethernet bridge. Traffic that appears on one interface is copied to the
other interface. The modem operates at OSI Layer 2, the MAC layer, so
the modem doesn't care about IP addresses, with one exception. The modem
sniffs the outgoing traffic and looks for a destination IP that matches
its hardcoded internal web server. That traffic is hijacked and directed
to the modem's internal web server rather than pushed over the bridge.

.---router----.
|--LANsideIP | .----modem----.
| WANsideIP--|---|--WANsideIP |
'-------------' |ISPsideIP --|
'-------------'

Does your router report the modem's WAN-side IP address?


I assume you mean LANside, and the answer will be no. The router's next
hop gateway will be inside the ISPs network, usually the CMTS itself.
The router's next hop gateway will never be the modem.

If your router
is configured for dynamic IP address assigned (from the modem's internal
DHCP server)


Not the modem's DHCP server, since it gets disabled during modem boot,
but rather the ISPs CMTS.

it should list what is its "gateway" IP address (where to
find the modem but its IP address).


Yes, and that will usually be the CMTS, never the modem. It could be an
edge router rather than the CMTS, but it'll never be the modem.

--

Char Jackson
  #14  
Old December 15th 18, 11:10 PM posted to alt.windows7.general
VanguardLH[_2_]
external usenet poster
 
Posts: 10,881
Default IP6 Address

Char Jackson wrote:

You'll have to power cycle the modem so it can learn your MAC address,
and I recommend power cycling your PC, as well, although "ipconfig
/release /renew" should also do the trick.


Because of DHCP assignment of IP addresses, it is best to first bring up
the host at the top end of the chain first so its DHCP server is ready
when the next lower device comes up. Have DHCP ready to server the next
downstream device.

- Power down all devices.
- Bring up modem. Let it settle.
- Bring up router. Let it settle (much quicker than the modem).
- Bring up hosts connected to router.

With the simplified setup of just one host to the cable modem:
- Power down all devices.
- Bring up modem.
- Bring up host.
  #15  
Old December 15th 18, 11:19 PM posted to alt.windows7.general
VanguardLH[_2_]
external usenet poster
 
Posts: 10,881
Default IP6 Address

Mark Lloyd wrote:

On 12/14/18 7:29 PM, David E. Ross wrote:

[snip]

I generally avoid combination devices -- router-modem, printer-scanner,
etc -- because subcomponents rarely fail together. I am concerned that
Southern California Edison's momentary spike might cause only the router
part of a router-modem to fail. If that happens with separate modem and
router, I could still connect directly to the modem until I can replace
the router. This indeed happened.


A printer-scanner does make it easy to make copies.

Other than that, I avoid combination devices too, ESPECIALLY modem
router. A modem (I have cable) is under the control of your ISP. A
router is a part of YOUR network, and the ISP shouldn't have anything to
do with that.


Pretty hard to decide what modem you get unless you buy your own. ISPs
tend to remove the old stock of modem and populate their inventory with
a specific model. Eliminates them having to carry multiple models and
have to support them. If you lease the modem from the ISP (most likely
scenario), you get what they give you. You might have an old model for
a while but when you go to trade it in (old one doesn't work, old one
doesn't have enough channels for the increased speed tier), you'll get
their newer model.

You can always put your own router downstream of the cable modem. You
will have to do that, anyway, if you have more wired hosts than the
number of ports on the combo modem. You might also want to subnet your
network, like having one for your host(s) and another for your family's
host(s) to, for example, let them get to the Internet but block them
from getting into your subnet. You might have to support your family as
their computer/network guru but that doesn't mean you need to let them
get at your hosts after they're infected because they clicked on a
rogueware popup when they were web surfing.

The combo modems usually don't have the same level of configurability as
the stand-alone routers. However, when you call in for tech support,
you better get your host wired directly to their combo modem because
they won't support your router sitting between their combo modem and
your host(s).

If you buy your own modem, like to have it only a modem and not a
router, your ISP's support ends at the service entry point to your home.
Unless there's a cabling problem outside the house, you won't get any
support from your ISP (other than they will [re]provision the modem).
 




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