> I've heard conflicting reports about how many PPP sessions can be
> established on a 7200VXR with an NSE-1 processor.Has anyone got some real
> life numbers. Also how many PPP sessions to an L2TP tunnel, and how many
> sessions can be established per second. I've read the glossy sheets, now I'd
> like to hear the real-life tails of woe.
Well, the NSE-1 is basically NPE-300 plus PXF. I don't believe the PXF
will help you with the L2TP termination, so we're back to NPE-300.
We're using 7140s (which are basically NPE-300) for L2TP termination.
This is your basic dialup setup, with single link PPP terminated on
Nortel CVX 1800s, and multilink PPP sessions tunneled to the 7140s.
We estimate that with our current rate of session establishment/
teardown, we'd top out at around 500 - 600 sessions per 7140. Note that
it's definitely the session establishment/teardown that is killing the
CPU here - I can easily believe that the same 7140 could handle 2000 or
more sessions in a steady-state environment.
We're definitely in the market for a more scalable solution - we'd
like to be able to handle at least 5000 sessions per box. The VPN 3000
concentrator claims to support 5000 sessions, but seems otherwise
somewhat limited. The documentation for the L2TP features is rather
thin...
Steinar Haug, Nethelp consulting, sthaug@nethelp.no
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