ipv6 default-route-advertise
Function
The ipv6 default-route-advertise command configures the wireless access controller to advertise default IPv6 routes.
The undo ipv6 default-route-advertise disables the wireless access controller from advertising default IPv6 routes.
By default, the wireless access controller does not advertise default IPv6 routes.
Format
ipv6 default-route-advertise [ always | match default | route-policy route-policy-name ] [ cost cost | tag tag | [ level-1 | level-2 | level-1-2 ] ] * [ avoid-learning ]
undo ipv6 default-route-advertise
Parameters
| Parameter | Description | Value |
|---|---|---|
| always | Indicates that the wireless access controller always advertises default IPv6 routes. | - |
| match default | Indicates that if the routing table contains a default IPv6 route generated by other routing protocols but not IS-IS, the default route is advertised through an LSP. | - |
| route-policy route-policy-name | Specifies the name of a route-policy. A Level-1-2 device advertises default routes to the IS-IS routing domain only when there are external routes matching the route-policy in the routing table of the device. This prevents routing blackhole when link faults make some important external routes unavailable but default routes are still advertised. This route-policy does not affect external route import in IS-IS. | The value is a string of 1 to 40 case-sensitive characters without spaces. |
| cost cost | Specifies the cost value of an advertised default route. | The value is an integer that ranges from 0 to 4261412864. |
| tag tag | Specifies the tag value of an advertised default route. | The value is an integer that ranges from 1 to 4294967295. |
| level-1 | Sets the level of advertised default IPv6 routes to Level-1. If the level is not specified, Level-2 default routes are generated by default. | - |
| level-2 | Sets the level of advertised default IPv6 routes to Level-2. If the level is not specified, Level-2 default routes are generated by default. | - |
| level-1-2 | Sets the level of advertised default IPv6 routes to Level-1-2. If the level is not specified, Level-2 default routes are generated by default. | - |
| avoid-learning | Prevents an IS-IS process from learning default routes and adding them to the routing table. If there has been an active default IPv6 route in the routing table, the default IPv6 route becomes inactive after this parameter is specified. | - |
Usage Guidelines
- Configure IS-IS on a Level-1-2 device to advertise default routes into the IS-IS routing domain.
- Configure IS-IS on a Level-1-2 device to import routes of other routing domains into the IS-IS routing domain.
Using the route-policy, you can force IS-IS to generate default routes only when there are matched routes in the routing table.
If the apply isis level-1 command is used in the route-policy view, IS-ISv6 can generate default routes in Level-1 LSPs. If the apply isis level-1 command is used in the route-policy view, IS-IS can generate default routes in Level-1 LSPs.
If the apply isis level-2 command is used in the route-policy view, IS-ISv6 can generate default routes in Level-2 LSPs.
If the apply isis level-1-2 command is used in the route-policy view, IS-ISv6 can generate default routes in Level-1 and Level-2 LSPs.
The ipv6 default-route-advertise command can take effect only after IPv6 is enabled for the IS-IS process by the ipv6 enable command.
