HP 6125XLG Layer 3 - Ip Routing Configuration Manual page 157

must dynamically adjust the LSP packet size to fit the smallest interface MTU, which takes time and affects
other services.
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 LSP flash
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 LSP fragment
extension.
4. Configure a virtual system
ID.
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 [ process-id ] [ vpn-instance vpn-instance-name ]
flash-flood [ flood-count flooding-count |
max-timer-interval flooding-interval | [ level-1 |
level-2 ] ] *
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
lsp-fragments-extend [ level-1 |
level-1-2 | level-2 ]
virtual-system virtual-system-id
145
Remarks
N/A
N/A
By default, the maximum length
of generated Level-1 LSPs or
Level-2 LSPs is 1497 bytes.
By default, the maximum length
of received LSPs is 1497 bytes.
Remarks
N/A
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 at least one virtual system to
generate extended LSP fragments.