Load balance on 3750 over 2 ISP

[y.lo]

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]

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

[y.lo]

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]

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]

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 · Accepted solution]

Per-flow balancing, that is the optimal method.

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

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