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#1
October 7th 09, 11:01 AM
posted to microsoft.public.windowsxp.network_web
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IP adresses for network cards in computer
This must be pretty basic, but...
My computer has a main board with two Ethernet ports. These show in the system information as two 'cards'. The computer has one IP address, so is it right that each card should have the same IP address? Roger 
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#2
October 7th 09, 03:02 PM
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IP adresses for network cards in computer
On Oct 7, 11:01*am, "Roger R" wrote:
This must be pretty basic, but... My computer has a main board with two Ethernet ports. These show in the system information as two 'cards'. The computer has one IP address, so is it right that each card should have the same IP address? Roger NO. Each Ethernet port will get an unique IP address whenever a cable is connected to a DHCP "service" or you assign one to each port. If the computer has only one port, only one port appears to be connected to a DHCP "service" which would get it an IP address.
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#3
October 7th 09, 03:02 PM
posted to microsoft.public.windowsxp.network_web
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IP adresses for network cards in computer
On Oct 7, 11:01*am, "Roger R" wrote:
This must be pretty basic, but... My computer has a main board with two Ethernet ports. These show in the system information as two 'cards'. The computer has one IP address, so is it right that each card should have the same IP address? Roger NO. Each Ethernet port will get an unique IP address whenever a cable is connected to a DHCP "service" or you assign one to each port. If the computer has only one port, only one port appears to be connected to a DHCP "service" which would get it an IP address.
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#4
October 7th 09, 10:09 PM
posted to microsoft.public.windowsxp.network_web
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IP adresses for network cards in computer
Hi
Unless you have a specific use for the second card disable the unused card. In many cases two cards, if active, should be configured to be on two different Networks. Two cards on the same network id usually a "Gate" to troubles. Jack (MS, MVP-Networking). "Roger R" wrote in message ... This must be pretty basic, but... My computer has a main board with two Ethernet ports. These show in the system information as two 'cards'. The computer has one IP address, so is it right that each card should have the same IP address? Roger
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#5
October 7th 09, 10:09 PM
posted to microsoft.public.windowsxp.network_web
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IP adresses for network cards in computer
Hi
Unless you have a specific use for the second card disable the unused card. In many cases two cards, if active, should be configured to be on two different Networks. Two cards on the same network id usually a "Gate" to troubles. Jack (MS, MVP-Networking). "Roger R" wrote in message ... This must be pretty basic, but... My computer has a main board with two Ethernet ports. These show in the system information as two 'cards'. The computer has one IP address, so is it right that each card should have the same IP address? Roger
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#6
October 8th 09, 11:21 PM
posted to microsoft.public.windowsxp.network_web
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IP adresses for network cards in computer
"smlunatick" wrote in message ... On Oct 7, 11:01 am, "Roger R" wrote: This must be pretty basic, but... My computer has a main board with two Ethernet ports. These show in the system information as two 'cards'. The computer has one IP address, so is it right that each card should have the same IP address? Roger NO. Each Ethernet port will get an unique IP address whenever a cable is connected to a DHCP "service" or you assign one to each port. If the computer has only one port, only one port appears to be connected to a DHCP "service" which would get it an IP address. ------------- Thanks, one possible error eliminated. In my simple set up I have one XP port linked by cable to the router modem and set to DHCP. This works fine no problem. The other XP port is connected by cable to a Win98 machine. Not sure whether it is better to set this to DHCP on both computers (doesn't seem to work) OR to set the addresses manually. (not successful yet) If setting the TCP/IP manually, presumably the DNS boxes are left blank? I have Zone alarm in operation, and with DHCP the address for the XP machine on the XP - Win98 network has entry 0.0.0.0. which can't be right. Roger
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#7
October 8th 09, 11:21 PM
posted to microsoft.public.windowsxp.network_web
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IP adresses for network cards in computer
"smlunatick" wrote in message ... On Oct 7, 11:01 am, "Roger R" wrote: This must be pretty basic, but... My computer has a main board with two Ethernet ports. These show in the system information as two 'cards'. The computer has one IP address, so is it right that each card should have the same IP address? Roger NO. Each Ethernet port will get an unique IP address whenever a cable is connected to a DHCP "service" or you assign one to each port. If the computer has only one port, only one port appears to be connected to a DHCP "service" which would get it an IP address. ------------- Thanks, one possible error eliminated. In my simple set up I have one XP port linked by cable to the router modem and set to DHCP. This works fine no problem. The other XP port is connected by cable to a Win98 machine. Not sure whether it is better to set this to DHCP on both computers (doesn't seem to work) OR to set the addresses manually. (not successful yet) If setting the TCP/IP manually, presumably the DNS boxes are left blank? I have Zone alarm in operation, and with DHCP the address for the XP machine on the XP - Win98 network has entry 0.0.0.0. which can't be right. Roger
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#8
October 9th 09, 08:11 AM
posted to microsoft.public.windowsxp.network_web
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IP adresses for network cards in computer
Your 2nd card will need to be manually set, along with the 98 machine. What you are describing is called "internet connection sharing". A google search willl find multiple sites to help you set it up.
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#9
October 9th 09, 08:11 AM
posted to microsoft.public.windowsxp.network_web
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IP adresses for network cards in computer
Your 2nd card will need to be manually set, along with the 98 machine. What you are describing is called "internet connection sharing". A google search willl find multiple sites to help you set it up.
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#10
October 9th 09, 10:19 AM
posted to microsoft.public.windowsxp.network_web
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IP adresses for network cards in computer
Strictly speaking, IP addresses don't belong to computers but to 'interfaces'
-an interface being a wire (or radio signal) that goes somewhere. The important points here are that two separate interfaces cannot have the same IP address if they are to be active at the same time. Also, interfaces which connect to two separate networks should have different subnet ranges. With some makes of LAN card, you can 'team' two NICs into a single interface, which will then have one IP. Both sockets will then effectively form part of the same network. Unfortunately this is not always possible, it depends on the driver software. "Roger R" wrote: This must be pretty basic, but... My computer has a main board with two Ethernet ports. These show in the system information as two 'cards'. The computer has one IP address, so is it right that each card should have the same IP address? Roger
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#11
October 9th 09, 10:19 AM
posted to microsoft.public.windowsxp.network_web
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IP adresses for network cards in computer
Strictly speaking, IP addresses don't belong to computers but to 'interfaces'
-an interface being a wire (or radio signal) that goes somewhere. The important points here are that two separate interfaces cannot have the same IP address if they are to be active at the same time. Also, interfaces which connect to two separate networks should have different subnet ranges. With some makes of LAN card, you can 'team' two NICs into a single interface, which will then have one IP. Both sockets will then effectively form part of the same network. Unfortunately this is not always possible, it depends on the driver software. "Roger R" wrote: This must be pretty basic, but... My computer has a main board with two Ethernet ports. These show in the system information as two 'cards'. The computer has one IP address, so is it right that each card should have the same IP address? Roger
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