Configuring Spf Parameters; Assigning A High Priority To Is-Is Routes - HP MSR2000 series Configuration Manual

Enabling LSP fragment extension
After LSP fragment extension is enabled for an IS-IS process, the MTUs of all the interfaces running the
IS-IS process must not be less than 512; otherwise, LSP fragment extension will not take effect.
At least one virtual system must be configured for the router to generate extended LSP fragments. An IS-IS
process allows 50 virtual systems.
To enable LSP fragment extension:
Step
1. Enter system view.
2. Enter IS-IS view.
Enable LSP fragment
3.
extension and specify the
working mode.
4. Configure a virtual system
ID.

Configuring SPF parameters

When the LSDB changes on a router, a route calculation starts. Frequent route calculations consume a lot
of system resources. You can set an appropriate interval for SPF calculations to improve efficiency.
To configure the SPF parameters:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Configure the SPF
calculation interval.

Assigning a high priority to IS-IS routes

An IS-IS topology change causes network convergence. By assigning a high priority to specific IS-IS
routes, you can achieve faster network convergence.
To assign a high priority to IS-IS routes:
Step
1. Enter system view.
2. Enter IS-IS view.
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
lsp-fragments-extend [ [ level-1 | level-1-2 |
level-2 ] | [ mode-1 | mode-2 ] ] *
virtual-system virtual-system-id
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
timer spf maximum-interval [ initial-interval
[ second-wait-interval ] ]
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
152
Remarks
N/A
N/A
Not enabled by default.
Not configured by default.
Remarks
N/A
N/A
Optional.
The default SPF calculation
interval is 10 seconds.
Remarks
N/A
N/A