[TriLUG] problems with multiple interfaces on a RHEL5.5 x64 machine

[Warren Myers]

# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
172.17.11.0     0.0.0.0         255.255.255.0   U         0 0          0 eth1
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth1
0.0.0.0         172.17.11.1     0.0.0.0         UG        0 0          0 eth1

and with both interfaces up:

# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
172.17.11.0     0.0.0.0         255.255.255.0   U         0 0          0 eth1
172.17.11.0     0.0.0.0         255.255.255.0   U         0 0          0 eth2
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth2
0.0.0.0         172.17.11.1     0.0.0.0         UG        0 0          0 eth2


On Tue, Nov 8, 2011 at 19:31, Matt Pusateri <mpusateri at wickedtrails.com>wrote:

> Heath is on track here most likely.  What does netstat -rn show when only
> eth1 is up versus when eth2 is up.  Also when you are pinging external IP's
> are you pinging by IP or by hostname?  If it's by hostname, I would suspect
> that your name servers are getting set in resolv.conf when you get an
> address via DHCP.
>
> Matt P.
>
>