[j-nsp] juniper m5 and flapping pings

[Harry Reynolds]

You should try pinging through the box. Locally generated ICMP traffic
is low-priority and may experience significant jitter. There is no way
to alter the priority (or lack of) in JUNOS software, so the best bet is
to generate the traffic elsewhere.

HTHs.
 

> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net 
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of 
> Florian Taeger
> Sent: Monday, March 28, 2005 5:50 AM
> To: Erdem Sener
> Cc: juniper-nsp at puck.nether.net
> Subject: RE: [j-nsp] juniper m5 and flapping pings
> 
> I'm pinging via the box ... I tried different servers ... 
> everywhere the same problem. I even changed switches etc. It 
> must be the m5 causing this problem.
> but why ...
> 
> Regards
> 
> Florian
> 
> Quoting Erdem Sener <erdem.sener at borusantelekom.com>:
> 
> >
> > Hi Florian,
> >
> > Are you pinging 'from' the box itself or "via" the box? In 
> case you're 
> > experiencing this "from" the box, you should check whether 
> if you have 
> > logging enabled on a firewall filter applied to interface(s).
> >
> > You could also do a "show chassis cfeb" and check the CPU status.
> >
> > Cheers,
> > Erdem
> >
> >> -----Original Message-----
> >> From: juniper-nsp-bounces at puck.nether.net
> >> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Florian 
> >> Taeger
> >> Sent: Monday, March 28, 2005 4:37 PM
> >> To: juniper-nsp at puck.nether.net
> >> Subject: [j-nsp] juniper m5 and flapping pings
> >>
> >> Hi everybody,
> >>
> >> I'm just experiencing some very strange behaviour of a m5 
> router. The 
> >> router is used to speek bgp with around 200 peers and with 3x 
> >> 1000Base-SX and 4x 100Base-TX interfaces.
> >> Everything seems to work properly, but every 45 to 60 seconds the 
> >> pings to all external targets jump up to 40ms (or even
> >> 80ms) for some ms. Then everything works fine again at <5ms.
> >> I tried to change the chassis to a m10 but the problem itself does 
> >> not disappear. I even changed the pics, but again the 
> problem did not 
> >> disapear. I don't think the router engine causes this problem - 
> >> everything else workes fine (routing itself, ...).
> >>
> >> So I'm not quite sure what could cause this behaviour. The 
> router is 
> >> at a cpu load < 30% ...
> >>
> >> Does anyone of you know this issue? Any suggestions? I do 
> not have a 
> >> spare routing engine, so I'm not able to change this part at the 
> >> moment. Everything else (chassis, pics) were changed in the past - 
> >> without any change of the problem.
> >>
> >> Best regards,
> >>
> >> Florian
> >>
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> >>
> >
> >
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