Let say in a layer 3 switch we have two same static routes with the default same AD doing the path load balancing, example :-
ip route 0.0.0.0 0.0.0.0 10.10.1.1
ip route 0.0.0.0 0.0.0.0 10.10.1.2
:: whereby 10.10.1.1 is the Router A and 10.10.1.2 is the Router B, both going into the same network cloud.
We all know that that both routes will get installed into the routing table, and it will be the switching process that do the load-sharing which is the cef and by default it is a per destination load-shares (src-dst IP pair)
My question is how can I know which path is being use for a particular session pair ? such as if we have source A,B and destination C,D and some scenario such as the below :-
- A to C will use the first path (Router A)
- A to D will use the second path (Router B)
- B to C will use the second path (Router B)
- B to D will use the first path (Router A)
So how can I determine which path a src-dst pair will take and selected ? can we get the table information on all this details ? if src A to dst C use the first path, it will always be persistent for this pair right ?
You can check the output packet rate of output interface after the ping from source to destination.once the ping completes check out on which interface the output packet rate got increased.Thus you can determine the path.Just try it ..perhaps it may help you..
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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