Advertising a Default Route

Context

In an IPv6 routing table, a default route is a route to network ::/0. If the destination address of a packet does not match any entry in the routing table, the packet is sent through a default route.

There are two methods to advertise RIPng default routes. You can configure a device to advertise RIPng default routes according to networking requirements.

Procedure

Run system-view
The system view is displayed.
Run interface interface-type interface-number
The interface view is displayed.
(Optional) On an Ethernet interface, run undo portswitch
The interface is switched to Layer 3 mode.

By default, an Ethernet interface works in Layer 2 mode.

Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support switching between Layer 2 and Layer 3 modes.
Run ripng default-route { only | originate } [ cost cost ]
The device is configured to advertise RIPng default routes.

By default, there is no default route in the RIPng routing domain.

Configure the device to advertise default routes according to networking requirements:
- only: configures the device to advertise only IPv6 default routes (::/0), suppressing the advertisement of other routes. If the local device is located on the network edge and the details of the local network need to be hidden, you can set this parameter to enable the devices on other networks to access the local network only through the local device.
- originate: configures the device to advertise IPv6 default routes (::/0) without affecting the advertisement of other routes. If the local device is located on the network edge and some details of the local network need to be hidden, you can set this parameter to enable the devices on other networks to use the default route when connecting to certain devices on the local network.
The device advertises generated RIPng default routes using Update packets through a specified interface regardless of whether these routes exist in the local IPv6 routing table.