Any one used Multilink PPP on 2 x DS3's?

[arapoport]

Hello,

I'm trying to get this multilink PPP to work correctly, it DOES comes up with the aggregate bandwith of 88420 but it's having a hard time going over 45-50M.

It looks like the CPU peaks when the link gets over 45M, this is a 7206, NPE 150 with a PA-2DS3 and a PA-2FE-TX.

Any suggestions or recommendations?

Thank you.

[tbaranski]

I assume CEF is enabled? MLPPP can be somewhat of a CPU hog on certain platforms / IOS versions. You may be better off with per-packet CEF.

[arapoport]

THANK YOU.

okay, so per interface (each serial int) enable

ip load-sharing per-packet

and

ip cef load-sharing algorithm tunnel 1

(since there is only 2 x DS3 and no more paths) ???

Would you recommend anything else, or a different setup?

[tbaranski]

I don't think you need the load-sharing algorithm command, but you can experiment to see if one algorithm gives better results than the others.

I should note that per-packet CEF load sharing essentially requires that the links have equal latencies. If latency varies, packets can arrive at the remote end out-of-order, which dramatically reduces TCP performance. In this case, per-flow CEF load sharing is a better bet, though it tends to not distribute load as well as per-packet CEF.

[arapoport]

Thank you.