Solved: Load balance on 3750 over 2 ISP

y.lo · ‎03-31-2010

I got 2 sites, both with 3750 installed and they are connected using 2 ISP. I found the command "ip load-sharing per-packet" is not supported on 3750. How can I distribute traffic evenly over the 2 links?

paolo bevilacqua · ‎03-31-2010

Per-flow balancing, that is the optimal method.

Per-packet introduces out-of-order arrival and must be avoided.

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paolo bevilacqua · ‎03-31-2010

You cannot, beside a 3750 is not apt for connecting to ISP.

y.lo · ‎03-31-2010

So there is nothing we can do to make the situation better? Would disabling route cache help a bit?

Also, there seems to be a table that stores the destination address of traffic. Would this table has a timeout value? Thanks.

paolo bevilacqua · ‎03-31-2010

You have a L3 switch, there is no route cache and stuff like that.

The device is already operating at its best, if you want more options, get a true router.

y.lo · ‎03-31-2010

Thanks for your reply. What if there are 2 or more optimal routes to the same destination network? How would it forward the packet?

paolo bevilacqua · ‎03-31-2010

Per-flow balancing, that is the optimal method.

Per-packet introduces out-of-order arrival and must be avoided.

Please remember to rate useful posts clicking on the stars below.