Configuring Spf Parameters; Setting The Lsdb Overload Bit - 3Com S7906E Configuration Manual

Follow these steps to add an interface into a mesh group and block an interface:
To do...
Enter system view
Enter interface view
Add the interface to a mesh
group
Block the interface
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...
Enter system view
Enter IS-IS view
Configure the SPF
calculation interval

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...
Enter system view
Enter IS-IS view
Use the command...
system-view
interface interface-type
interface-number
isis mesh-group
mesh-group-number
isis mesh-group
mesh-blocked
Use the command...
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
timer spf maximum-interval
[ initial-interval [ second-wait-interval ] ]
Use the command...
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
1-30
Remarks
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Required to choose either.
By default, the interface neither
belongs to any mesh group nor
is blocked.
Remarks
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Optional
The default SPF
calculation interval is 10
seconds.
Remarks
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