Re:

TTL expired is a fairly good indicator of a loop. Do a traceroute.

--
Marko Milivojevic - CCIE #18427
:: This message was sent from a mobile device. I apologize for errors and brevity. ::
On Jul 5, 2012, at 12:03, <mohd-mousa_at_hotmail.com> wrote:
> Hi Folks.
> 
> I have strange behaivor while I was labbing today,when i tried to ping
> from R2 lo0 to router R4 fas0/0 ( there is multiple redis between them )
> the ping doesn't happen, but when i did the ping from f0/0 of R4 to R2 lo0
> the pinging was fine..
> 
> 
> I tried to trace and debug ip icmp, the result showed that R4 received the
> packet and stopped there,
> 
> This is the output :
> 
> ICMP: time exceeded (time to live) sent to 10.10.10.5 (dest was 10.10.10.6)
> time exceeded (time to live) sent to 10.10.10.5 (dest was 10.10.10.6)
> time exceeded (time to live) sent to 10.10.10.2 (dest was 216.100.1.6)
> ICMP: time exceeded (time to live) sent to 10.10.10.2 (dest was 216.100.1.6)
> ICMP: time exceeded (time to live) sent to 10.10.10.4 (dest was 10.10.10.6)
> ICMP: time exceeded (time to live) sent to 10.10.10.2 (dest was 216.30.100.5)
> ICMP: time exceeded (time to live) sent to 10.10.10.2 (dest was 216.30.100.5)
> ICMP: time exceeded (time to live) sent to 10.10.10.2 (dest was 216.30.100.5)
> 
> Guys,my console was hangging from the output, could any one tell me
> whats the meaning of this output ?
> 
> could this relate to routing loops, i turned debug ip routing but didn't see
> route flapping ?
> 
> 
> I made multiple redistribution but not on this router!!!
> any additional configration will be happy to provide, but i don't want to make
> my post long and boring.
> 
> 
> 
> Thanks in advance.
> 
> 
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