3Com S7902E, Configuration Manual

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Follow these steps to add an interface into a mesh group and block an interface:
To do… Use the command… Remarks
Enter system view system-view ––
Enter interface view
interface interface-type
interface-number
––
Add the interface to a mesh
group isis mesh-group
mesh-group-number
Block the interface
isis mesh-group
mesh-blocked
Required to choose either.
By default, the interface neither
belongs to any mesh group nor
is blocked.
The mesh group feature takes effect only on P2P interfaces.
Configuring SPF Parameters
When the LSDB changes on a router, a route calculation starts. Frequent route calculations consume a
lot of system resources, while route calculations at a proper interval improve efficiency. You can set an
appropriate interval for SPF calculations as needed.
Follow these steps to configure the SPF parameters:
To do… Use the command... Remarks
Enter system view system-view ––
Enter IS-IS view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
––
Configure the SPF
calculation interval timer spf maximum-interval
[ initial-interval [ second-wait-interval ] ]
Optional
The default SPF
calculation interval is 10
seconds.
Setting the LSDB Overload Bit
By setting the overload bit in sent LSPs, a router informs other routers of a failure that makes it
incapable of routing and forwarding packets.
When an IS-IS router cannot record the complete LSDP due to running out of memory or some other
reasons, it will calculate wrong routes. To make troubleshooting easier in this case, you can temporarily
isolate the router from the IS-IS network by setting the overload bit.
Follow these steps to set the LSDB overload bit:
To do… Use the command… Remarks
Enter system view system-view ––
Enter IS-IS view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
––