Configuring Mesh Groups of IS-IS Interfaces
A mesh group is a set of routing devices that are fully connected; that is, they have a fully meshed topology. When link-state PDU packets are being flooded throughout an area, each router within a mesh group receives only a single copy of an link-state PDU packet instead of receiving one copy from each neighbor, thus minimizing the overhead associated with the flooding of link-state PDU packets.
To create a mesh group and designate that an interface is part of the group, assign a mesh-group number to all the routing device interfaces in the group:
To prevent an interface in the mesh group from flooding link-state PDUs, configure blocking on that interface:
For a list of hierarchy levels at which you can include these statements, see the statement summary sections for these statements.
