We had a similar case with microbursts and lots of small packets and after
moving to NPE-G2, we're very happy with it.
Traffic goes up, CPU is blocked at 75%, still no sign of drops.
Regarding the pause frames, i'm too very confused about them being supported.
http://markmail.org/message/y7bjuudmbrfofp6z
--
Tassos
Lars Lystrup Christensen wrote on 11/02/2009 15:47:
Hi John
We had the same issue a few years ago on a Cisco 7204VXR with the NPE-G1
processor. I believe we were told, that we had hit the max capacity of the
router.
______________________________________
Med venlig hilsen / Kind regards
Lars Lystrup Christensen
Director of Engineering, CCIE(tm) #20292
Danske Telecom A/S
Sundkrogsgade 13, 4
2100 K?benhavn ?
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of john douglas
Sent: 11. februar 2009 14:36
To: [email protected]
Subject: [c-nsp] 7301 NPE-G1 gigabit overruns
Hi All,
I am hoping someone may have some guidance.
We have some 7301 NPE-G1 running 12.2(33)SRC3 connected to Catalyst
3560 switch, dot1q trunking with a few Vlans. I find on the 7301
router whenever I try to drive a given gigabit sub interface beyond
about 200mbps I begin to see Input Errors (Overruns) incrementing on
the physical interface and begin exhibiting packet loss. Under the
show controller information I see rx_overrun and rx_int_drop
incrementing - all other Rx error values under "Statistics" section
are zero. On the switch I see pause input incrementing, but no errors.
Cpu is 40%.
I have read other postings about this being attributed to microburst
of traffic but I am still a little unclear I am trying to work out
1) Does the G1 correctly support pause frames?
2) Are there any knobs we can tweak - or we simply hitting the limits
of the silicon?
The short term solution has been to spread the vlan sub interfaces
over the 3 gig interfaces however this leaves me in a situation where
I cannot really use EEM to migrate sub interface config from one
gigabit interface to another should there be a failure, as the target
interface will being exhibiting overruns and loss.
Any advice appreciated,
Kind regards,
John
_______________________________________________
cisco-nsp mailing list [email protected]
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
_______________________________________________
cisco-nsp mailing list [email protected]
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
_______________________________________________
cisco-nsp mailing list [email protected]
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
