Re: Interesting Routing Problem

[rex henderson <rex henderson sfccu1 santafe cc fl us>]

Your switch maybe using Spanning Tree to determine possible routing
loops. Finding such a loop, it shuts one of the ports off.
You can evade this by reconfiguring your ports to use Optimized Device
Switching.
R.

"Paul B. Brown" wrote:
> 
> Gang,
> 
> I'm having a problem with activating 2 NICs on one computer.  Both NICs
> are on the same Cisco switch.  Here is the info:
> 
> eth0 - 38.202.144.145/27
> eth1 - 38.202.144.146/27
> Gateway: 38.202.144.129
> 
> Kernel IP Routing Table:
> 
> Destination    Gateway       Genmask          Flags  MSS Window irtt Iface
> 38.202.144.128 0.0.0.0        255.255.255.224 U     1500 0      0    eth1
> 38.202.144.128 0.0.0.0        255.255.255.224 U     1500 0      0    eth0
> 127.0.0.0      0.0.0.0        255.0.0.0       U     3584 0      0    lo
> 0.0.0.0        38.202.144.129 0.0.0.0         UG    1500 0      0    eth0
> 
> # arp -a
> 
> ? (38.202.144.129) at 00:00:0C:07:AC:07 [ether] on eth1
> onlineringman.com (38.202.144.132) at 00:A0:C9:EA:A8:C7 [ ether] on eth0
> onlineringman.com (38.202.144.132) at 00:A0:C9:EA:A8:C7 [ ether] on eth1
> 
> IP Forwarding is on
> 
> >From 38.202.144.132/27 I can ping 38.202.144.145 without a problem.
> However, I can only ping 38.202.144.146 about 50% of the time.  What
> gives?  Is this a network config issue on the switch?  How about the
> router?  Hummmm . . . how about something in /etc/sysconfig?
> 
> Paul
> 
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