[c-nsp] need an idea -- router's all TCP sessions STUCK

[Rodney Dunn]

What is the case number for this?

I think I saw an email go by about it
showing up as CEF drops for the packets if
so that would explain why a clear ip route *
fixes it and the other commands don't.

Rodney

On Sun, Nov 28, 2004 at 07:48:10PM +0100, Kinczli Zoltán wrote:
> Hello,
>  
>   i'd need an idea here...
>  
> A router (c72k w NPE-G1, 12.3(6a)) runs OSPF, and MP-BGP, it's an MPLS/VPN PE.
> Roughly in each 2,5-3 hours all of its TCP sessions (LDP and BGP) get stucked: hold timer exp, nbr down.
>  
> Strange:
>    all OSPF neighbors are up and happy
>    router can only ping neighbors via serial interfaces
>         there are ATM uplinks, and serial 'downlink' to other/further PEs and CEs
>    router can not initiate TCP sessions via the 'pingable' serial I/Fs,  ... nor via the others
>  
> A clear ip route * solves the issue!
>  
> all of the following together won't solve the issue though:
> - shut/no shut on I/Fs with routing sources behind them (ospf neighbors),
> - clear ip ospf proc
> - clear adj
> - clear tcp tcb *
> - clear ip bg ne *
>  
> what's the difference between the clear ip route * and them?
>  
> there is plenty of contniuous free mem available... just before all of you ask:
>  
> router#sh mem summ
>                 Head    Total(b)     Used(b)     Free(b)   Lowest(b)  Largest(b)
> Processor   62C7A200   456678912    28742624   427936288   425854868   425109588
>       I/O    E000000    33554432     9864712    23689720    22977192    23398272
> 
>  
> other info:
>  
> in  deb ip tcp trans there are lots of:
> >> Nov 27 22:19:18.587 CET: TCP: Alert! Received a broadcast packet from x.y.z.o
>         from different sources, not our address space
>  
>  
> thanks for any idea
>   -zoltan
> 
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