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3Com Switch 7750 Series
Command Reference Guide – Routing Protocol Chapter 4 Integrated IS-IS Configuration Commands
4-18
4.1.19 isis circuit-level
Syntax
isis circuit-level [ level-1 | level-1-2 | level-2 ]
undo isis circuit-level
View
Interface view
Parameter
level-1: Specifies to set up only level-1 adjacency for the interface.
level-1-2: Specifies to set up level-1-2 adjacency for the interface.
level-2: Specifies to set up only level-2 adjacency for the interface.
Description
Use the isis circuit-level command to set link adjacency for the level-1-2 router.
Use the undo isis circuit-level command to resume the default configuration of link
adjacency for the level-1-2 router.
An interface can be configured level-1-2 adjacency by default.
This command is only available for a level-1-2 router. If the local host is level-1-2
router and it need to set up some adjacency (level-1 or level-2) with a peer router,
then you can use this command to prescribe the local interface to receive and send
only the hello packets. An interface can receive and send only one type of hello
packet on a point-to-point link. You can use this command to reduce the router’s
processing time to save bandwidth.
Related command: is-level.
Example
# Set the level-1 attributes for Vlan-interface 10 to prohibit sending and receiving
level-2 Hello packets when the interface is connected to a non-backbone router within
the same area.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] interface Vlan-interface 10
[3Com-Vlan-interface10] isis enable
[3Com-Vlan-interface10] isis circuit-level level-1