Formation and maintenance of ISIS-SPB adjacencies

ISIS-SPB only supports point-to-point links within an IS-IS level 1. It sends P2P hellos between directly connected nodes to form and maintain adjacencies. To forward traffic on an adjacency, two SPBM neighbors must meet the following requirements:

• The neighbors have the same configuration digest for MSTI 4092.

• The neighbors have the same B-VLAN to ECT algorithm mapping.

• The neighbors have valid link metric values.

	NOTE: In SPBM, you must map all B-VLANs to MSTI 4092.