RHEL Routing
 

We have two RHEL 5 servers, one is a web front end for the other which is a database server.

We created two bond groups, one to go to our user vlan, and the other is a vlan that only the two servers are on. The goal is the web server communicates with the database server via the second vlan, and isolates it from the main user network.

The problem we are seeing is we lose half of our packets going between servers. Using MTR to traceroute the other server, it jumps to 50% Packet loss after a couple seconds.

Does anyone know the proper way to setup these interfaces? I'm apparently missing something.

Let me know what info you need and I'll do my best to provide it.

Thanks in advance.
--Aric

When you say "bond groups", are you talking about the bonding of physical NICs? If so, how are they configured at the server end? Are you using LACP? And how about the switch ports, how are they configured?

Are the VLAN connections physical connections to the switch, or are you using 802.1q trunking?

From the symptoms and the number of packets lost (50%), I'd say there's something wrong with the bonding setup.

Sorry for the late reply.

Yes we are bonding physical nics, 3 on one server and 4 on the other, and lag groups are defined on the switch.

However I am starting to think it's a resolution issue. If I do an MTR to the ip address of the other machine it works fine, it's only if I try to go to the hostname.

I put an entry into the host file, but it didn't seem to make a difference. I even put a host entry in that is a completely different name and dns suffix and it still starts losing packets.

Any thoughts?