Bug ID 558858: Unexpected loss of communication between slots of a vCMP Guest

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP vCMP(all modules)

Known Affected Versions:
11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2 HF1, 11.5.3 HF1, 11.5.3 HF2, 11.5.4 HF1, 11.5.4 HF2, 11.4.1, 11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,

Fixed In:
11.6.1 HF1, 11.5.4 HF3

Opened: Nov 18, 2015

Severity: 3-Major

Related Article: K80079953


1. Within the vCMP guest, the affected slot shows the other slot(s) to be offline. When logged into any other "offline" slot, the slot shows itself to be online. 2. Within the vCMP guest, on the affected slot, the log files (such as /var/log/ltm) have stopped recording log entries from the other slot(s). 3. Within the vCMP guest, on the affected slot, the eth1 interface shows TX increasing but RX not increasing. The eth1 interface on other slots shows both TX and RX increasing.


The number of working slots in a vCMP guest is reduced to 1 slot. The effect on traffic may range from none to severe.


Only affects vCMP guests with 2 or more slots on VIPRION C2000-series chassis.


Within the vCMP guest, login to the command line (vconsole or SSH) of the affected slot and run the following: ifconfig eth1 down ; ifconfig eth1 up Alternatively, from the hypervisor, modify the vCMP guest to the Configured state, and wait to confirm the vCMP guest has stopped on all slots. Then return the vCMP guest to the Deployed state.

Fix Information

This release no long exhibits loss of communication between slots of a vCMP Guest.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips