Usage Scenario
PBB VPLS divides an HVPLS network into an access VPLS domain and a backbone VPLS domain by deploying I-VSIs and B-VSIs on access-, aggregation-, and core-layer devices. In the access VPLS domain, I-VSIs provide VPLS services; in the backbone VPLS domain, B-VSIs provide VPLS services.
VSIs in PBB VPLS consist of I-VSIs and B-VSIs. A B-VSI processes B-MAC addresses and uses the configured peer address to determine a PW's remote PE. A B-VSI must be enabled before being configured. To enable a B-VSI, run the
pbb b-vsi enable command.
Prerequisites
PBB VPLS uses LDP as the signaling protocol. A signaling protocol and a VSI ID have been configured using the pwsignal ldp and vsi-id commands, respectively.
The IDs of an I-VSI and a B-VSI on the local end must be different.
Configuration Impact
The undo pbb b-vsi enable command deletes all PBB VPLS configurations of a B-VSI and unbinds I-VSIs from the B-VSI. Therefore, exercise caution when using this command.
Precautions
- The pbb b-vsi enable and vsi vsi-name b-vsi commands can both enable a B-VSI. You can use either one.
- Enable I-VSIs and B-VSIs before configuring them. The I-VSIs and B-VSIs can be configured in a random order.
- A VSI bound to an AC interface cannot be configured as a B-VSI.
- An mVSI cannot be configured as a B-VSI.
- A B-VSI can be configured with a peer address, but cannot be bound to any AC interface.