[nsp] Multiple T1s: MLPPP vs. equal path CEF

sthaug at nethelp.no sthaug at nethelp.no
Wed Aug 20 22:23:28 EDT 2003

> Is it not true that when using equal path CEF, the maximum speed a single
> TCP stream can attain is 1.5 Mb/s, no matter how many T1s are in the group?

It is true if you use the default per-destination load balancing. If you
use per-packet load balancing, a single TCP stream can use N x 1.5 Mbps
- but you also risk delivering some packets out of order, which may be a
problem in some cases.

We run per-packet load balancing on up to 4 E1s, and have had no customer
complaints so far.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no

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