Hi All, we have a PIX 525, with (2) fiber 1GB interfaces, auto neg, connected to a 3750G switch, auto neg. We are incrementing interface counters on the "No Buffer" and "Overrun". The output interpretor tool suggests a few things, but I wanted to pass it out to the community to see if anyone else has run into this issue. I am planing upgrading the PIX OS from 6.3.3 to 7.0.1, then up to 8.0.4 after it runs a few weeks.
interface gb-ethernet0 "Hostdmz" is up, line protocol is up
Hardware is i82543 rev02 gigabit ethernet, address is 000e.0c2b.d2b3
IP address 10.X.X.X, subnet mask 255.255.254.0
MTU 1500 bytes, BW 1 Gbit full duplex
2166496744 packets input, 75837026583963 bytes, 76922875 no buffer
Received 938241735 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 152071 frame, 278320 overrun, 0 ignored, 0 abort
4221379184 packets output, 34008554011956 bytes, 0 underruns
input queue (curr/max blocks): hardware (0/25) software (0/0)
output queue (curr/max blocks): hardware (0/256) software (0/0)
The interface runs over 5,000 PPS with an avg. packet size of 183bytes RX and 591bytes TX
Current traffic is 7.46MB RX 27MB TX
No client complaints to speak of.
Yes, it could be one of the old cosmetic bugs.
You said you would upgrade, please take the PIX to the latest 7.x version it can support and check if these counters still increment. With such low traffic I doubt they will.
I hope it makes sense.
I would suggest tracking link use during the counters increase. With 7Mbps it doesn't make much sense for them to increase. There were some defects in older releases where counters increased without high traffic and they were cosmetic.
I hope it helps.