[c-nsp] GSR 12008 physical loop ping problem?

[Sorin CONSTANTINESCU]

Thanks a lot! 

Still, how do you manage to find the BugIDs so easily? :)

-- 
Sorin CONSTANTINESCU
consta at gmail.com
Linux Registered User #222086

On Tue, 16 Nov 2004 21:34:19 +0100, Oliver Boehmer (oboehmer)
<oboehmer at cisco.com> wrote:
> Sortin,
> 
> 
> 
> > I'm bothering you with another possible problem i've discovered today,
> > while trying to test this router and some linecards before i put them
> > to work ;)
> >
> > So... i looped an STM-1 interface with a Fiber patch, the line
> > protocol went up, and i could ping the interface (HDLC encapsulation),
> > but, see below:
> 
> > Sending 100, 4470-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds:
> > !.!.!.!.!.!.!.!.!.!.
> > Success rate is 50 percent (10/20), round-trip min/avg/max = 1/1/4 ms
> > Router#p
> 
> bort.
> > Sending 100, 750-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds:
> > !!!!!!!.!!!!!!!.!!!!!!!.!!!!!!!.!!!!!!!.!!!!!!!.!!!!!!!.!!!!!!!.!!!!!!
> > !!.!!!!!!!!.!!!!!!!!.!!!!!!!!.
> > Success rate is 88 percent (88/100), round-trip min/avg/max = 1/1/4 ms
> > Router#p
> 
> >
> > Only if i ping with small packets, i don't have packet loss.
> >
> > The STM-1 port isn't broken. I connected it into another router, and
> > it works fine with 4470 bytes pachets with DF set.
> >
> > Should this happen?
> 
> Please check out CSCea11267 (pinging to own POS interface fails). We
> heavily rate-limit this ICMP traffic (i.e. sourced from our own address)
> towards the Linecard CPU, this is why it works with smaller pings (less
> traffic).
> 
>        oli
>