Question about bonding nics and mtu configuration

justin.kinney at academy.com justin.kinney at academy.com
Mon Jun 9 14:03:23 CDT 2008


> Re: Question about bonding nics and mtu configuration


One thing I forgot to mention - make sure that ICMP isn't being firewalled 
at the host level on these boxes.

If the packet is indeed too large, the destination host will typically 
drop the packet respond to the source with an ICMP error indicating that 
the MTU needs to be reduced.

If there is a firewall between these hosts that you didn't mention, or if 
the source host is blocking ICMP type 3 messages, it may never adjust it's 
MTU.

Thanks,
Justin
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