HP 6125XLG Layer 3 - Ip Routing Configuration Manual page 156

If such a change occurs frequently, excessive LSPs are generated, consuming a large amount of
router resources and bandwidth. To solve the problem, you can adjust the LSP generation interval.
When network changes are not frequent, the minimum-interval is adopted. If network changes
become frequent, the LSP generation interval is incremented by incremental-interval × 2
number of calculation times) each time a generation occurs until the maximum-interval is reached.
To specify the LSP refresh interval and generation interval:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Specify the LSP refresh
interval.
4. Specify the LSP
generation interval.
3. Specify LSP sending intervals.
If a change occurs in the LSDB, IS-IS advertises the changed LSP to neighbors. You can specify the
minimum interval for sending these LSPs to control the amount of LSPs on the network.
On a P2P link, IS-IS requires an advertised LSP be acknowledged. If no acknowledgement is
received within a configurable interval, IS-IS will retransmit the LSP.
To configure LSP sending intervals:
Step
1. Enter system view.
2. Enter interface view.
3. Specify the minimum
interval for sending LSPs
and the maximum LSP
number that can be sent at a
time.
4. Specify the LSP
retransmission interval on a
P2P link.
Specifying LSP lengths
IS-IS messages cannot be fragmented at the IP layer because they are directly encapsulated in frames.
IS-IS routers in an area must send LSPs smaller than the smallest interface MTU in the area.
If the IS-IS routers have different interface MTUs, HP recommends configuring the maximum size of
generated LSP packets to be smaller than the smallest interface MTU in the area. Otherwise, the routers
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
timer lsp-refresh seconds
timer lsp-generation maximum-interval
[ minimum-interval
[ incremental-interval ] ] [ level-1 |
level-2 ]
Command
system-view
interface interface-type
interface-number
isis timer lsp time [ count
count ]
isis timer retransmit seconds
144
Remarks
N/A
N/A
By default, the LSP refresh
interval is 900 seconds.
By default:
•
The maximum interval is
5 seconds.
•
The minimum interval is
20 milliseconds.
•
The incremental interval
is 200 milliseconds.
Remarks
N/A
N/A
By default, the minimum interval is
33 milliseconds, and the maximum
LSP number that can be sent at a
time is 5.
By default, the LSP retransmission
interval on a P2P link is 5 seconds.
n-2 (n is the