Go to main content

Managing Network Datalinks in Oracle® Solaris 11.4

Exit Print View

Updated: November 2020

VLANs and the STP and TRILL Protocols

VLANs are ignored by the standards-compliant STP. The bridging protocol computes just one loop-free topology by using tag-free BPDU messages, and uses this tree topology to enable and disable links. You must configure any duplicate links that are provisioned in your networks such that when those links are automatically disabled by STP, the configured VLANs are not disconnected. You must either run all VLANs everywhere on your bridged backbone or carefully examine all redundant links.

The TRILL protocol does not follow the complex STP rules. Instead, TRILL automatically encapsulates packets that have the VLAN tag intact and passes them through the network.