Guest

Preview Tool

Cisco Bug: CSCuj73571 - cat4k : CPU queue gets stuck with DHCPv6 control packets.

Last Modified

Nov 27, 2020

Products (2)

  • Cisco Catalyst 4000 Series Switches
  • Cisco Catalyst 4000 Series Switches

Known Affected Releases

15.2(1)E 15.2(3.5)T

Description (partial)

Symptom:ARP, IGMP and other control protocols stop being processed.
<br><br>

Conditions:Sup8E running 3.3.0XO, or Sup7E/Sup7L-E/4500X running 3.5.0E.
<br>
Multiple iterations of "show platform cpu packet driver" show the following:
<br>
#show platform cpu packet driver <br>
Forerunner Packet Engine 0.28 (0)<br>
Receive Queues: received packets summary<br>
Qu  Capac  Guara  CurPo  Unpro  Accum   Kept  BperP           Packets<br>
 2   2512    112   2303      0      3   2511     64            339959 <--- Kept stays at 2511, Packets does not increment<br>
 8   1008    512     67      0      3      3     64                67<br>
 9   2512    304     96      0      0      0    433                96<br>
Receive Queues: dropped packets summary<br>
Qu     Total Packets      Drop No Cell      Drop Overrun     Drop Underrun<br>
 2            339959         100390067                 0                 0 <--- Drop No Cell increments
<br><br>

Related Community Discussions

Upgrading stack switch 3750 to switch 4506-E with sup8E
Hi guy Recently we broguht 4506-E with Supp-8E and when connect our Stack switch 3750 with 4506 port gi2/1 in trunk mode and configure vlan 1 with ip address, from clinet site i can ping the 4506 ping for sudden period and after than i cannot ping it.  
Latest activity: Apr 08, 2014
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.