The ipv6 circuit default-tag command sets the administrative tag value for an IS-IS IPv6 interface.
The undo ipv6 circuit default-tag command restores the default value of the administrative tag.
By default, the administrative tag value for all IS-IS IPv6 interfaces is 0.
ipv6 circuit default-tag tag [ level-1 | level-2 ]
undo ipv6 circuit default-tag [ tag ] [ level-1 | level-2 ]
| Parameter | Description | Value |
|---|---|---|
| tag | Specifies the administrative tag value of the route imported by an IPv6 interface. | The value is an integer ranging from 1 to 4294967295. |
| level-1 | Sets the administrative tag value for a Level-1 IPv6 interface. | - |
| level-2 | Sets the administrative tag value for a Level-2 IPv6 interface. | - |
If neither level-1 nor level-2 is specified in the ipv6 circuit default-tag command, the administrative tag value is set for all Level-1 and Level-2 IPv6 interfaces.
The administrative tag value is advertised together with the routing information.
When the cost style of IS-IS is narrow or narrow-compatible, the administrative tag value is not advertised in the LSP and does not takes effect
When the cost type of IS-IS is wide, wide-compatible, or compatible, the administrative tag value is advertised in the LSP.
The ipv6 circuit default-tag command can take effect only after IPv6 is enabled for the IS-IS process by the ipv6 enable command.