[j-nsp] SNMP stat from PE-4GE-TYPE1-SFP-IQ2

Alain Briant alain.briant at c-s.fr
Fri Mar 28 09:18:41 EDT 2008

Hello Eric

The behavior you're describing is strange but it makes me thinking that 
this kind of card on the M7i has 4 ports with over subscription (the 
total bandwidth for the card is 1gig) so divided by 4,  it gives each 
port about 250M bps !

I don't know if this is the reason of your problem and it can seem to be 
a silly way to think about it but you should have this in mind.


Eric Van Tol a écrit :

>Hi all,
>I'm having some trouble graphing traffic stats from a PE-4GE-TYPE1-SFP-IQ2 from multiple network monitoring boxes.  The issue seems to be that when the traffic for one of the ports on the PIC reaches > ~200Mb/s the graphs become jagged.  I am using SNMPv2, as well as 64-bit counters.  Stats on other non-IQ2 PICs seem to work fine at >200M.  This one particular interface has MAC accounting enabled, but I doubt that's the problem.  I'm on an M7i running 8.5R1.13.
>Has anyone else come across this?  I looked through the JUNOS bugs and couldn't really find anything relevant.  I'm pretty sure that it's not my NMS or how I'm graphing, as I have three different sources (MRTG, Cacti, and Solarwinds Orion) currently graphing the interface and all show the same jagged results.
>juniper-nsp mailing list juniper-nsp at puck.nether.net

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