On Fri, Nov 12, 2010 at 11:54:03AM -0500, Benjamin Lovell wrote: > Following up on this. Does the 3560 support etherchannel hash on > src-dst-mac and src-dst-ip? This should change up the hash between CEF and > etherchannel and prevent a polarization like effect.
No. Either src-dst-ip or src-dst-mac. There is no composite of the two. The puzzling thing to me is, I have identified flows between two IPs, that examined with "ip cef exact-route" and "test etherchannel load-balance", SHOULD use the unutilized link. However, given that 0 traffic is flowing over the unutilized link, clearly there is something else internally going on that is not clear to me that is undocumented. switch#show ip cef exact-route 172.16.79.186 192.168.42.183 172.16.79.186 -> 192.168.42.183 => IP adj out of Vlan100, addr 10.10.1.245 switch#show vlan id 100 VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 100 uplink1 active Po4 switch#test etherchannel load-balance interface po4 ip 172.16.79.186 192.168.42.183 Would select Gi0/51 of Po4 switch#show controller util | inc (^Port|Gi0/51) Port Receive Utilization Transmit Utilization Gi0/51 1 0 And I've confirmed via NetFlow that a non-trivial amount of data is exchanged between those two IPs. -- Brandon Ewing ([email protected])
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