On Mon, 24 Jan 2000, Neil J. McRae wrote:
> On Mon, 24 Jan 2000 10:06:01 -0500 (EST)
> Tony Tauber <ttauber@bbnplanet.com> wrote:
>
> > The other problem we've seen is input ignores when SRAM on
> > the VIPs isn't that high (2MB) and there's lots of traffic
> > bound for one or two busy output pipes (like the normal aggregation
> > box) with high numbers of input interfaces (like a box loaded with
> > CT3s). Due to the way the buffers are carved, any given channel on
> > the CT3 gets not too much memory.
> > Watch out for VIP2-40s (can't carry more than 2MB) or cards
> > based on them like the CT3IP (vs. PA-MC-T3 with a VIP2-50).
> > Looks like upping the SRAM to 4 or 8MB works much better.
>
> We've seen that on ATM PA-A3's with lots of sub interfaces,
> the solution was to lower the MTU. Although remember not
> to change the MTU on a live box.
on an ATM interface its probably better to enlarge the main interfaces MTU
to (at least) the MTU on the sub-interface or strange things may happen
Regards
Rafi
>
> Regards,
> Neil.
> --
> Neil J. McRae C O L T I N T E R N E T
> neil@COLT.NET
>
>
>
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