06-13-2012 12:10 AM
Hello Cisco,
I have seen a few cases with what appear to be bogus counter increments on multiple ports for example as follows:
fc2/15 is up
Port description is VMAX 601194-FA08F1
Hardware is Fibre Channel, SFP is short wave laser w/o OFC (SN)
Port WWN is 20:4f:00:0d:ec:2a:11:40
Admin port mode is F, trunk mode is off
snmp link state traps are enabled
Port mode is F, FCID is 0x01001f
Port vsan is 121
Speed is 2 Gbps
Transmit B2B Credit is 20
Receive B2B Credit is 16
Receive data field Size is 2112
Beacon is turned off
5 minutes input rate 491910485133076760 bits/sec, 61488810641634595 bytes/sec, 61489146735798893 frames/sec
5 minutes output rate 491912172380660848 bits/sec, 61489021547582606 bytes/sec, 61489146840890389 frames/sec
18446744022123834516 frames input, 18446645859856220640 bytes
0 discards, 18446744073709551614 errors
18446744073709551615 CRC, 0 unknown class
0 too long, 0 too short
18446744052814023184 frames output, 18446707443362223868 bytes
0 discards, 0 errors
18446744073709551614 input OLS, 18446744073709551615 LRR, 0 NOS, 0 loop inits
18446744073709551615 output OLS, 0 LRR, 18446744073709551615 NOS, 0 loop inits
16 receive B2B credit remaining
20 transmit B2B credit remaining
20 low priority transmit B2B credit remaining
Interface last changed at Wed Mar 14 23:26:10 2012
See CRC, OLS, LRR, NOS = 18446744073709551615.
This number equates to 2^64 -1. The maximum possible value of a 64-bit counter?
I would suspect a bug - any known issues or bugs?
NXOS 4.2(7d)
thanks.
06-13-2012 05:27 AM
It looks like a rare cosmetic issue with Gen1 linecards, which go end of support later this year. Does the problem return after clearing the counters?
06-14-2012 12:02 AM
looks ok after clearing
12-11-2012 07:28 AM
For non-Gen1 linecards, it may be this bug.
CSCud05214 Large FC interface counters
http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCud05214&from=summary
Fixed in NX-OS 5.2(8) and above.
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