[quagga-dev 7319] Re: VLANs and Timers bug ?

Milan Kocian milon at wq.cz
Sat Oct 31 19:40:38 GMT 2009


On Fri, Oct 30, 2009 at 04:11:44PM +0100, Ingo Flaschberger wrote:
> Hi,
> 
> >> sounds like a multicast bug.
> >> check if multicast (224.0.0.5 / 224.0.0.6) enter and leave the router and
> >> is also seen at other routers.
> >>
> >> check ospf helo timers:
> >> show ip ospf neighbor
> >>
> >> Kind regards,
> >> 	ingo flaschberger
> >>
> >
> > Hello,
> >
> > thanks for the answer and the hint. Multicast seems ok (for me).
> 
> Check with tcpdump if you send and receive multicast messages,
> especially helo's.
> 
> > Then I tried to check command 'show ip ospf neighbor' and
> > I see decrementing till zero and then jump to start value.
> 
> Counters should reset back to "standard" 40sec every 10sec, as 10sec is 
> the helo interval.
> 
> if counters run down to 0, the ospfd does not receive helo's.
> 
> Kind regards,
>  	Ingo Flaschberger
> 
 
I discovered command 'debug ospf packet hello recv detail', hmm :-)
And I see:

Oct 31 20:08:46 172.24.118.98 ospfd[4242]:
----------------------------------------------------- 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]: Header 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   Version 2 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   Type 1 (Hello) 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   Packet Len 48 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   Router ID 172.24.114.2 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   Area ID 0.0.0.0 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   Checksum 0x661b 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   AuType 1 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   Simple Password beLAMone 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]: Hello 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   NetworkMask 255.255.255.224 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   HelloInterval 5 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   Options 18
(*|-|-|EA|-|-|E|*) 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   RtrPriority 5 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   RtrDeadInterval 60 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   DRouter 172.24.118.97 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   BDRouter 172.24.118.98 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:   # Neighbors 1 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:     Neighbor 172.24.118.98 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]: Hello received from
[172.24.114.2] via [eth0.171:172.24.118.98] 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:  src [172.24.118.97], 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:  dst [224.0.0.5] 
Oct 31 20:08:46 172.24.118.98 ospfd[4242]:
----------------------------------------------------- 

So packets are received and logged. So where is disappeared?

regards,

-- 
Milan Kocian



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