I have a 7606 that is load balancing over OSPF using 8 routes. Coming out of the 7606 are 4 wireless paths, each on a separate routed interface, and two fiber paths, each routed over 2 vlans each. On the far side of the 2 fiber paths the next hop splits off into 2 more wireless paths each. All paths end up on a single, 48 port, 3560G switch. When I have all 8 paths load balancing, I get disproportionate balancing. Paths 1, 2, 7, and 8, do 5/8 of the traffic, paths 5 and 6 do 1/4 of the traffic, and paths 3 and 4 do 1/8 of the traffic. So it would appear that the 1/8 traffic missing from paths 3 and 4, is being equally distributed over paths 1, 2, 7, and 8. Paths 5 and 6 are taking their due share of the traffic. If I disable any one path, the remaining 7 paths balance equally, and it does not matter which of the 8 paths I disable. I have gone over the configuration meticulously and I cannot find any issues. Does anyone here have any ideas? I can provide whatever running configuration one might want to look at.
Here is the network diagram.
LVC is a 7606
ST1 is a 3560G
L14 is a 3560E
PTS is a 3560G
[[{"type":"media","fid":"1310396","view_mode":"default","link_text":null,"attributes":{"alt":"Network Diagram","title":"Network Diagram","height":"648","width":"1495","class":"image-style-none media-element file-default"}}]]This is the current cef state:
#show cef state
CEF Status:
RP instance
common CEF enabled
IPv4 CEF Status:
CEF enabled/running
dCEF enabled/running
CEF switching enabled/running
universal per-destination load sharing algorithm, id DD476B35
