On Thu, Oct 25, 2007 at 04:47:10PM +1000, Matt Carter wrote: > Firstly, I'm no expert in Cisco buffers, but it seems you have failures all > the way up to and including the Huge buffer pool, which I would think is > most certainly going to result in packet drop.
Yes. But those buffers are *only* for process switched packets. We call them "system buffers". Transient packets being forwarded under interrupt use private particle pools and are not impacted for those packets. > > Secondly, I did come across a bug which looks awefully like the message you > are seeing. > > 006349: Jul 24 00:08:56.164 AEST: %SYS-4-CHUNKMALLOCFAIL: Could not allocate > chunks for CEF: arp throt > Total free: 0, Total inuse: 500, Cause : Not a dynamic chunk > -Process= "<interrupt level>", ipl= 1 -Traceback= 0x60635A94 0x60799A98 > 0x60799AFC 0x614551D8 0x614950A8 0x6016FC94 0x60173F28 0x6084085C 0x60773520 This is some punt protection changes that were put in place. > > TAC response was i was being affected by bug CSCsj25679 Yep. That's the right bug. > > Symptom: %SYS-2-CHUNKMALLOCFAIL messages on c7200 router while sending > traffic > > Conditions: %SYS-2-CHUNKMALLOCFAIL messages on c7200 router can be seen > while box is so much stress with traffic with higher size of packets. > (>=512bytes) > > Workaround: There is no workaround. These messages not impacting any service > like traffic and sessions drop. > > Hi Matt, > > The bug was first found in version 12.4(13.13)T6 and was first fixed in > 12.4(16.13). > > The developer of CSCsj25679 confirmed that your issue is the same with the > bug. However, he still haven't verified the mainline release on which this > bug was first found. > > <...> > > By the way, developer informed me that CSCsj25679 was first seen in > 12.4(13.10). > > > > > > > > > I just recently installed a new 7206VXR/NPE-G2 router, and looking > > at > > > > the logging output I am seeing the following: > > > > > > > > Oct 23 11:27:51.705 EDT: %SYS-4-CHUNKMALLOCFAIL: Could not allocate > > > > chunks for > > > > CEF: arp throt > > > > Total free: 0, Total inuse: 500, Cause : Not a dynamic chunk > > > > -Process= "<interrupt level>", ipl= 1, pid= 77, -Traceback= > > 0x13D5688 > > > > 0x20974 0x20428 0x172B074 0x8BB14 0x686EFC 0x68AAD0 0x682A84 0x66D44C > > > > 0x66C328 > > > > 0x671D50 0x66DA90 0x66C3E4 0x19DDCB4 0x19DDA3C 0x19DB0EC > > > > > > _______________________________________________ > 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/
