HP HPE FlexNetwork 7500 series, Configuration Manual

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Step Command Remarks
3. Specify the LSP refresh
interval.
timer lsp-refresh seconds
By default, the LSP refresh
interval is 900 seconds.
4. Specify the LSP generation
interval.
timer lsp-generation
maximum-interval
[ minimum-interval
[ incremental-interval ] ] [ level-1 |
level-2 ]
By default:
•
The maximum interval
is 5 seconds.
•
The minimum interval
is 50 milliseconds.
•
The incremental
interval is 200
milliseconds.
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 acknowledgment is
received within a configurable interval, IS-IS will retransmit the LSP.
To configure LSP sending intervals:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Specify the minimum
interval for sending LSPs
and the maximum LSP
number that can be sent at
a time.
isis timer lsp time [ count count ]
By default, the minimum
interval is 33 milliseconds,
and the maximum LSP
number that can be sent at a
time is 5.
4. Specify the LSP
retransmission interval on
a P2P link.
isis timer retransmit seconds
By default, the LSP
retransmission interval on a
P2P link is 5 seconds.
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, configure the maximum size of generated LSP
packets to be smaller than the smallest interface MTU in the area. Without the configuration, the
routers 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 Command Remarks
1. Enter system view.
system-view N/A
2. Enter IS-IS view.
isis
[ process-id ] [
vpn-instance
vpn-instance-name ]
N/A
3. Specify the maximum length
of generated Level-1 LSPs or
Level-2 LSPs.
lsp-length originate size [ level-1 |
level-2
]
By default, the maximum
length of generated Level-1
LSPs or Level-2 LSPs is 1497
bytes.