486 CHAPTER 26: INTEGRATED IS-IS CONFIGURATION COMMANDS
is-level Syntax
is-level { level-1 | level-1-2 | level-2 }
undo is-level
View
IS-IS view
Parameter
level-1: Configures the router to operate at Level-1, only calculate the intra-area
routes and maintain the LSDB of L1.
level-1-2: Configures the router to operate at Level-2, calculate both the L1 and
L2 routes and maintain the LSDB of L1 and L2.
level-2: Configures the router to operate at Level-2, only switch L2 LSP and
calculate the L2 routes and maintain the LSDB of L2.
Description
Use the is-level command to configure the level of the IS-IS router.
Use the undo is-level command to restore the default value.
By default, the value is level-1-2.
We recommend setting the system Level, when you configure IS-IS.
If there is only one area, you are recommended to set the level of all the routers as
Level-1 or Level-2, because it is not necessary for all the routers to maintain two
identical databases. You are recommended to set all the routers to Level-2 for
convenient future extension, when applying them to IP network.
Related command: isis circuit-level.
Example
# Set the current router to operate at Level-1.
[SW8800] isis
[3Com-isis] is-level level-1
log-peer-change Syntax
log-peer-change
undo log-peer-change
View
IS-IS view
Parameter
None
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