Re: [nsp] ICMP slowness on PA-A3 with lots of PVC's

From: Steffen Baur (baur@noc.dfn.de)
Date: Wed Sep 22 1999 - 04:01:22 EDT


Neil,

On Mon, Sep 20, 1999 at 01:39:40PM +0100, Neil J. McRae wrote:
>
> We have a PA-A3 with around 80 PVC's and 80 Subinterfaces, we've
> noticed that traffic between the Interface IP addresses of
> each end of the PVC can have long RTT's, there appears to
> be no pattern, we're wondering if its a special feature that the
> Cisco might not be responding to pings because of load on
> the router/A3 card, [which is very low]. 11.1CC25 Vip2/50 on a RSP4 7507.

We experience RTTs around 1000ms to IP addresses on PA-A3
subinterfaces, too. It can be fixed with a shutdown/ no shutdown of
the subinterface. The high RTTs normally start after a crash of a VIP
in another slot (which happens regularly recently :-( ).

                        Steffen Baur, DFN-NOC

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