5-32Before configuring this task, you need to consider redundancy for interfaces to avoid the fact that LSPpackets cannot be flooded due to link failures.Follow these steps to add an interface into a mesh group and block an interface:To do… Use the command… RemarksEnter system view system-view ––Enter interface view interface interface-typeinterface-number ––Add the interface to a mesh group isis mesh-groupmesh-group-numberBlock the interface isis mesh-group mesh-blockedRequired to choose either.By default, the interface neitherbelongs to any mesh group nor isblocked.The mesh group feature takes effect only on P2P interfaces.Configuring SPF ParametersWhen the LSDB changes on a router, a route calculation starts. Frequent route calculations consume alot of system resources, while route calculations at a proper interval improve efficiency. You can set anappropriate interval for SPF calculations as needed.Follow these steps to configure the SPF parameters:To do… Use the command... RemarksEnter system view system-view ––Enter IS-IS view isis [ process-id ] [ vpn-instancevpn-instance-name ] ––Configure the SPF calculationintervaltimer spf maximum-interval [ initial-interval[ second-wait-interval ] ]OptionalThe default SPFcalculation interval is 10seconds.Setting the LSDB Overload BitBy setting the overload bit in sent LSPs, a router informs other routers of a failure that makes itincapable of routing and forwarding packets.
