3Com Switch 4800G 24-Port Configuration Manual page 348

348 C 29: IS-IS C
HAPTER ONFIGURATION
Configuring LSP
Parameters
To do...
Enter interface view
Disable the interface from
sending and receiving hello
packets
An IS-IS router periodically advertises all the local LSPs to maintain the LSP
synchronization in the entire area.
A LSP is given an aging time when generated by the router. When the LSP is
received by another router, its aging time begins to decrease. If the receiving
router does not get the update for the LSP within the aging time, the LSP will be
deleted from the LSDB.
The router will discard a LSP with incorrect checksum. You can configure the
router to ignore the incorrect checksum, which means a LSP will be processed
even with an incorrect LSP checksum.
On the NBMA network, the router will flood a new LSP received from an interface
to other interfaces. This can cause the LSP reflooding on the high connectivity
networks. To avoid this problem, you can make a mesh group of interfaces. The
interface in this group will only flood the new LSP to interfaces outside the mesh
group.
Follow these steps to configure the LSP parameters:
To do...
Enter system view
Enter IS-IS view
Specify a LSP refresh interval
Specify the maximum LSP
aging time
Specify LSP generation
interval
Enable the LSP flash flooding
function
Specify the maximum size of
the originated Level-1 or
Level-2 LSP
Specify the maximum size of
the received Level-1 or Level-2
LSP
Use the command...
interface interface-type
interface-number
isis silent
Use the command...
system-view
isis [ process-id ]
timer lsp-refresh seconds
timer lsp-max-age seconds
timer lsp-generation
maximum-interval
[ initial-interval
[ incremental-interval ] ]
[ level-1 | level-2 ]
flash-flood [ flood-count
flooding-count |
max-timer-interval
flooding-interval | [ level-1 |
level-2 ] ] *
lsp-length originate size
[ level-1 | level-2 ]
lsp-length receive size
Remarks
--
Required
Not disabled by default
Remarks
--
--
Optional
900 seconds by default
Optional
1200 seconds by default
Optional
2 seconds by default
Optional
Not enabled by default
Optional
Both are 1497 bytes by
default
Optional
Both are 1497 bytes by
default