The pbb i-tag command configures an I-SID for an I-EVPN instance.
The undo pbb i-tag command deletes the I-SID of an I-EVPN instance.
By default, no I-SID is configured for an I-EVPN instance.
Usage Scenario
An I-SID uniquely identifies a broadcast domain. One I-EVPN instance corresponds to one I-SID. If two PEs share the same I-SID, the two PEs belong to the same BUM group.
Precautions
Only an I-EVPN instance with an I-SID configured can be bound to a B-EVPN instance.
Running the undo pbb i-tag command unbinds an I-EVPN instance from a B-EVPN instance and deletes the B-MAC address configured for the I-EVPN instance. An I-SID cannot be modified after being configured. To change an I-SID, delete it using the undo pbb i-tag command and reconfigure a new one using the pbb i-tag command.