–
The MTU of an Ethernet interface must be greater than or equal to the sum of the
value of
max-size
and 3.
–
The MTU of a P2P interface must be greater than or equal to the value of
max-
size
.
l
Set the refresh interval for LSPs.
1.
Run:
system-view
The system view is displayed.
2.
Run:
isis
[
process-id
]
The IS-IS view is displayed.
3.
Run:
timer lsp-refresh
refresh-time
A refresh interval is set for LSPs.
To synchronize all LSPs in the areas, IS-IS regularly transmits all the current LSPs to
neighbors.
By default, the LSP refresh interval is 900s, and the maximum lifetime of an LSP is
1200s. Ensure that the LSP refresh interval is more than 300s shorter than the
maximum LSP lifetime. This allows new LSPs to reach all routers in an area before
existing LSPs expire.
NOTE
The larger a network, the greater the deviation between the LSP refresh interval and the
maximum LSP lifetime.
l
Set the maximum lifetime for LSPs.
1.
Run:
system-view
The system view is displayed.
2.
Run:
isis
[
process-id
]
The IS-IS view is displayed.
3.
Run:
timer lsp-max-age
age-time
The maximum lifetime is set for LSPs.
When a router generates the system LSP, it fills in the maximum lifetime for this LSP.
After this LSP is received by other routers, the lifetime of the LSP is reduced gradually.
If the router does not receive any more update LSPs and the lifetime of the LSP is
reduced to 0, the LSP will be deleted from the LSDB 60s later if no more updated
LSPs are received.
l
Set the minimum interval at which LSPs are sent.
1.
Run:
system-view
The system view is displayed.
S6700 Series Ethernet Switches
Configuration Guide - IP Routing
6 IS-IS Configuration
Issue 01 (2012-03-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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