high etherStatsDropEvents on 5500G link

[Huet_Gildas]

Hello,

we've got some stranges etherStatsDropEvents ( which might affect users) on a gigabit link between a 5500G-EI and a 8800 :

8800(G2/1/4) <--Gigabit link over a duplex monomode optic link--> 5500G(G1/0/28)

Infos about link :

• 8800 Side :<8807-INFO>dis interface GigabitEthernet 2/1/4
   GigabitEthernet2/1/4 current state :UP
   IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 0020-9c69-894b
   Description: Vers 5500ST-CARENE-1er
   The Maximum Transmit Unit is 1500
   Media type is optical fiber, loopback not set
   Port hardware type is 1000_BASE_LX_SMF
   1000Mbps-speed mode, full-duplex mode
   Link speed type is autonegotiation, link duplex type is autonegotiation
   Flow-control is not enabled
   Arp Nonflooding is not enabled
   The Maximum Frame Length is 1552
   Broadcast MAX-ratio: 50%
   Allow jumbo frame to pass
   PVID: 1
   Link-status hold interval:3 Sec
   Port link-type: trunk
    VLAN passing  : 1(default vlan), 2-11, 17, 111, 129
    VLAN permitted: 1(default vlan), 2-11, 17, 111, 129
    Trunk port encapsulation: IEEE 802.1q
   Last 300 seconds input:  1565 packets/sec 3846912 bits/sec     0%
   Last 300 seconds output:  2037 packets/sec 12267208 bits/sec     1%
   Input(total):  20619121903 packets, 7309526229726 bytes
           - broadcasts, - multicasts
   Input(normal):  20619121903 packets, 7309526229726 bytes
           133285186 broadcasts, 12925708 multicasts
   Input:  0 input errors, 0 runts, 0 giants,  0 throttles, 0 CRC
           0 frame,  19 overruns, - aborts, 19 ignored, - parity errors
   Output(total): 31966706806 packets, 19250045819665 bytes
           - broadcasts, - multicasts, 0 pauses
   Output(normal): 31966706806 packets, 19250045819665 bytes
           2345717057 broadcasts, 5258223487 multicasts, 0 pauses
   Output: 0 output errors,  - underruns, - buffer failures
           0 aborts, 0 deferred, - collisions, 0 late collisions
           - lost carrier, - no carrier
   Receive Packet Peak Value Info: 4954408 bits/sec, happened at 09:51:33 12-7-2012
   Transmit Packet Peak Value Info: 18627184 bits/sec, happened at 08:46:54 12-7-2012

• 5500 Side :<5500ST-CARENE_(100)>dis interface GigabitEthernet 1/0/28
   GigabitEthernet1/0/28 current state : UP
   IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 001e-c1ff-8dd8
   Description: VERS 8807-INFO
   Media type is optical fiber, loopback not set
   Port hardware type is 1000_BASE_LX_SFP
   1000Mbps-speed mode, full-duplex mode
   Link speed type is autonegotiation, link duplex type is autonegotiation
   Flow-control is not enabled
   The Maximum Frame Length is 1522
   Broadcast MAX-ratio: 50%
   Unicast MAX-ratio: 100%
   Multicast MAX-ratio: 100%
   Forbid jumbo frame to pass
   PVID: 1
   Mdi type: auto
   Port link-type: trunk
    VLAN passing  : 1(default vlan), 2-11, 17, 111, 129
    VLAN permitted: 1(default vlan), 2-11, 17, 111, 129
    Trunk port encapsulation: IEEE 802.1q
   Last 300 seconds input:  1899 packets/sec 1333004 bytes/sec
   Last 300 seconds output:  1495 packets/sec 480691 bytes/sec
   Input(total):  317730283 packets, 201086529168 bytes
           13397715 broadcasts, 12080325 multicasts, 0 pauses
   Input(normal):  - packets, - bytes
           - broadcasts, - multicasts, - pauses
   Input:  0 input errors, 0 runts, 0 giants,  - throttles, 0 CRC
           - frame,  - overruns, 0 aborts, - ignored, - parity errors
   Output(total): 248973916 packets, 93924014071 bytes
           1234294 broadcasts, 211074 multicasts, 0 pauses
   Output(normal): - packets, - bytes
           - broadcasts, - multicasts, - pauses
   Output: 0 output errors,  - underruns, - buffer failures
           0 aborts, 0 deferred, 0 collisions, 0 late collisions
           0 lost carrier, - no carrier

The problem :<5500ST-CARENE_(100)>dis rmon statistics GigabitEthernet 1/0/28
Statistics entry 1 owned by null is VALID.
  Interface : GigabitEthernet1/0/28<ifIndex.4227841>
  etherStatsOctets         : 2703730845, etherStatsPkts          : 566284690
  etherStatsBroadcastPkts  : 14637734  , etherStatsMulticastPkts : 12295396
  etherStatsUndersizePkts  : 0         , etherStatsOversizePkts  : 0
  etherStatsFragments      : 0         , etherStatsJabbers       : 0
  etherStatsCRCAlignErrors : 0         , etherStatsCollisions    : 0
  etherStatsDropEvents (insufficient resources): 3788010
  Packets received according to length:
  64     : 10424027  ,  65-127  : 232562449 ,  128-255  : 115869383
  256-511: 42867378  ,  512-1023: 14416633  ,  1024-1518: 15065064

It doesn't seem to come the 5500 himself, because it doesn't happen on anothers interfaces :

<5500ST-CARENE_(100)>dis rmon statistics GigabitEthernet 2/0/1
Statistics entry 4 owned by null is VALID.
  Interface : GigabitEthernet2/0/1<ifIndex.75497497>
  etherStatsOctets         : 3995614300, etherStatsPkts          : 21885558
  etherStatsBroadcastPkts  : 1014858   , etherStatsMulticastPkts : 503748
  etherStatsUndersizePkts  : 0         , etherStatsOversizePkts  : 0
  etherStatsFragments      : 0         , etherStatsJabbers       : 0
  etherStatsCRCAlignErrors : 0         , etherStatsCollisions    : 0
  etherStatsDropEvents (insufficient resources): 0
  Packets received according to length:
  64     : 4843283   ,  65-127  : 1793161   ,  128-255  : 890667
  256-511: 189319    ,  512-1023: 1711089   ,  1024-1518: 12458039

Version of the 5500:

<5500ST-CARENE_(100)>dis vers
3Com Corporation
SuperStack 4 Switch 5500G-EI Software Version 3Com OS V3.02.04s56
Copyright (c) 2004-2007 3Com Corporation and its licensors, All rights reserved.
SuperStack 4 Switch 5500G-EI uptime is 27 weeks, 6 days, 1 hour, 2 minutes

3Com SuperStack 4 Switch 5500G-EI 24-Port with 1 MIPS Processor
128M    bytes SDRAM
16384K  bytes Flash Memory
Config Register points to FLASH

Hardware Version is REV.C
CPLD Version is 002
Bootrom Version is 4.03
[Subslot 0] 24GE+4SFP  Hardware Version is REV.C
[Subslot 2] 2 STACK Hardware Version is REV.C

This problem seems to triggers a snmp trap ( cf IMC screenshot)

Can someone tell me what can provide these etherStatsDropEvents and how to resolve ?

Regards

Gildas Huet

P.S. This thread has been moved from Switches, Hubs, Modems (Legacy ITRC forum) to Comware-Based. -HP Forum Moderator