Summary
After upgrading to either VOSS 9.1.0.0 or 9.1.1.0, VSP 4900 switches with VIM5-4YE module may not establish link properly on VIM ports after a reboot. If encountered, ports can be recovered by reverting to a software version on the 8.10.x or 9.0.x code stream or upgrading to 9.2.0
Background
An improper initialization of the VIM port speed may occur and prevent the ports on the VIM from establishing link after upgrading a VSP 4900 with VIM5-4YE module to VOSS 9.1.0.0 or 9.1.1.0.
Impact
The software will need to be reverted to a VOSS 8.10.x or 9.0.x code version in order to recover links connected to the VIM module.
Products Affected
VSP 4900 with VIM5-4YE modules
Software Affected
- VOSS 9.1.0.0
- VOSS 9.1.1.0
Symptoms
VIM5-4YE ports on the VSP 4900 platform may not establish link after upgrading to VOSS 9.1.0.0 or 9.1.1.0
Workaround
Use of VOSS versions 8.10.6.1, 9.0.5.1 or 9.2.0.0 will avoid this problem prior to availability of the fix release.
Solutions
This issue will be addressed in the VOSS 9.1.2.0 release and later.
9.1.2.0 - target GA mid-June 2025
Please see the full field notice here for more details and future updates.
