Original Publication Date: 06/15/2010
Updated Date: 03/14/2016
This is the result of a known issue. The BIG-IP 3400 platform may experience interface FIFO and descriptor overruns. Under rare conditions, this issue can cause the interface to temporarily stall, and prevent the TMM and bcm56xxd processes from sending or receiving LACP packets. As a result, the system fails over due to a switchboard failsafe event.
When this issue occurs, error messages that appear similar to the following example may be logged to the /var/log/ltm file:
pvad: 01130003:6: Tmm disconnected!
lacpd: 01160018:1: Internal link 4.1 is UNAVAILABLE.
lacpd: 01160018:1: Non working internal trunk member 4.1 triggers switchboard failsafe take action.
lacpd: 01160016:6: Interface 4.1, link admin status: enabled, link status: up, duplex mode: full, lacp operation state: down
lacpd: 01160013:1: Switchboard FailSafe take action is set
F5 Product Development tracked this issue as CR122775 and it was fixed in BIG-IP version 10.2.0. For information about upgrading, refer to the BIG-IP LTM, ASM, GTM, PSM, Link Controller, WebAccelerator, APM, WAN Optimization, or Edge Gateway release notes.
Additionally, Hotfix-BIGIP-9.4.8-407.0-HF4 has been issued for BIG-IP 9.4.8. You may download this hotfix or later versions of the hotfix from the F5 Downloads site.
To view a list of the latest available hotfixes, refer to SOL9502: BIG-IP hotfix matrix.
For information about the F5 hotfix policy, refer to SOL4918: Overview of F5 critical issue hotfix policy.
For information about installing a hotfix for version 9.x systems, refer to SOL6845: Managing F5 product hotfixes for BIG-IP version 9.x systems.