"sol12326: Serial failover is not currently supported between VIPRION chassis" says this issue applies to versions of v11.3.0 and below. But the article hasn't been updated since 12/19/2012.
Can anybody confirm this issue has been resolved in v11.5.1?
This has not changed and is likely to stay that way. We are in the process of updating the affected versions in the article. This configuration is a challenge due to the clustered nature of the chassis; network failover is instead recommended.
If this is a feature that you are needing, please open a support case so that we can log your interest.