Controlling Spf Calculation Interval - HP FlexFabric 12900E Series Configuration Manual

To specify LSP lengths:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Specify the maximum length
of generated Level-1 LSPs or
Level-2 LSPs.
4. Specify the maximum length
of received LSPs.
Enabling LSP flash flooding
Changed LSPs can trigger SPF recalculation. To advertise the changed LSPs before the router
recalculates routes for faster network convergence, enable LSP flash flooding.
To enable LSP flash flooding:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Enable
flooding.
Enabling LSP fragment extension
Perform this task to enable IS-IS fragment extension for an IS-IS process. The MTUs of all interfaces
running the IS-IS process must not be less than 512. Otherwise, LSP fragment extension does not
take effect.
To enable LSP fragment extension:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Enable
extension.
4. Configure
system ID.

Controlling SPF calculation interval

Based on the LSDB, an IS-IS router uses the SPF algorithm to calculate the shortest path tree with
itself being the root, and uses the shortest path tree to determine the next hop to a destination
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
lsp-length originate size [ level-1 |
level-2 ]
lsp-length receive size
Command
system-view
isis [
vpn-instance-name ]
flash-flood
LSP flash
max-timer-interval flooding-interval | [ level-1 |
level-2 ] ] *
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
LSP fragment
lsp-fragments-extend [ level-1 |
level-1-2 | level-2 ]
a virtual
virtual-system virtual-system-id
process-id ] [
[ flood-count flooding-count
151
Remarks
N/A
N/A
By default, the
length of generated Level-1
LSPs or Level-2 LSPs is 1497
bytes.
By default, the
length of received LSPs is
1497 bytes.
Remarks
N/A
vpn-instance
N/A
|
By default, LSP flash
flooding is disabled.
Remarks
N/A
N/A
By default, this feature is disabled.
By default, no virtual system ID is
configured.
Configure a minimum of one virtual
system to generate extended LSP
fragments.
maximum
maximum