topic Re: 2 Cards RedHat in Operating System - Linux

2 Cards RedHat

castro_2 — Tue, 21 Oct 2003 14:10:59 GMT

I have a RedHat 8.0 and 2 netowrk cards, the networks are diferents and the gateway. How can I do to set a diferent gateways for each card.
Thanks

Re: 2 Cards RedHat

Steven E. Protter — Tue, 21 Oct 2003 14:28:41 GMT

There is a file that can be manipulated.

/etc/sysconfig/network-scripts

ifcfg-eth0 for the first card
ifcfg-eth1 for the second

The syntax is

gateway=ip_address

ip_address is numeric.

SEP

Re: 2 Cards RedHat

castro_2 — Tue, 21 Oct 2003 14:53:41 GMT

Thanks
But there is another file call network.

Re: 2 Cards RedHat

Steven E. Protter — Tue, 21 Oct 2003 15:54:52 GMT

The files are in the directory I indicated.

When you finish the chagnes you can reset the network as follows:

service network restart

All existing connections will suspend for a few seconds.

SEP

Re: 2 Cards RedHat

Huc_1 — Wed, 22 Oct 2003 04:07:41 GMT

edit /etc/sysconfig/network-scripts/ifcfg-eth0

and modify or add to suite your needs

GATEWAY=XX.XX.XX.XX

do the same for the second card.

edit /etc/sysconfig/network-scripts/ifcfg-eth1

Hope this helps.

J-P

Re: 2 Cards RedHat

castro_2 — Wed, 22 Oct 2003 09:19:00 GMT

I do this. But when I do a netstat -rn show me a only gateway.

Routing tables
Destination Gateway Flags Refs Iface Interface Pmtu
150.230.14.0 0.0.0.0 U eth0
150.230.16.0 0.0.0.0 U eth1
127.0.0.0 0.0.0.0 U lo
0.0.0.0 150.230.16.1 GW eth1

There is a another gateway 150.230.14.1
Thanks

Re: 2 Cards RedHat

Huc_1 — Wed, 22 Oct 2003 09:28:10 GMT

Did you do a restart of service as SEP advised ?

That is as root do

#service network restart

!! please note this will stop and start network
for a few seconds !!

J-P

Re: 2 Cards RedHat

Alexander Chuzhoy — Wed, 22 Oct 2003 09:40:09 GMT

the best way is to define a default gateway for one NIC. I mean trough this gateway you can go anywhere.
and instead of defining default gateway for second network use static routes.
There can be problem when there are 2 default gateways. The system doesn't always correctly handles it. I mean instead of using the apropriate Network card to get to a specific subnet , it can choose a wrong card.
Best regards.

Re: 2 Cards RedHat

castro_2 — Wed, 22 Oct 2003 09:51:07 GMT

Yes, I restat the service #service network restart
and reboot the system.
How can I create a permanent static route?
Thanks

Re: 2 Cards RedHat

K.C. Chan — Wed, 22 Oct 2003 17:23:55 GMT

Did you try taking out gateway on /etc/sysconfig/network and make sure each gateway is listed on /etc/sysconfig/network-scripts/ifcfg-eth[0|1] respectively. This may work or may not. Give it a try, provided you're still testing it and have not moved this into production.