Use this command to configure IS-IS authentication key chain on an interface.
| keychain | Specifies the name of the key chain. Valid values are up to 16 alpha-numeric characters. |
| level-1 | (Optional) Specifies that the key chain configuration should be restricted to level 1. |
| level-2 | (Optional) Specifies that the key chain configuration should be restricted to level 2. |
If no level option is specified, the key chain is applied to both level 1 and level 2.
Interface configuration.
Key chain authentication is only performed if a key chain is configured.
Entering a key chain on an interface overrides any device level key chain or password configuration. Both a key chain and password can not coexist on an interface. If a password configuration already exists on the interface, it must be removed before configuring an interface level key chain.
You can specify authentication for an entire instance of IS-IS instead of at the interface level using authentication key-chain.
The “no” form of this command removes the authentication key-chain interface configuration.
This example shows how to configure the VLAN 100 IS-IS authentication key chain to keychainlv1 and restricts the key chain configuration to level 1:
System(rw)->configure System(rw-config)->interface vlan 100 System(rw-config-intf-vlan.0.100)->isis authentication key-chain keychainlv1 level-1 System(rw-config-intf-vlan.0.100)->
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