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

From: Steffen Baur (
Date: Wed Sep 22 1999 - 04:01:22 EDT


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

##       Network Operation Center, German science network (DFN)        ##
## finger ##
##               >>>>>>  mailto:  <<<<<<               ##
##  Phone: +49 711-63314-112, FAX +49 711-63314-133 (business hours)   ##

This archive was generated by hypermail 2b29 : Sun Aug 04 2002 - 04:12:06 EDT