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Configuration Guide - IP Unicast Routing

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of IP Unicast Routing, including IP Routing, Static Route, RIP, RIPng, OSPF, OSPFv3, IPv4 IS-IS, IPv6 IS-IS, BGP, Routing Policy, and PBR.
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Advertising a Default Route

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

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The interface view is displayed.

  3. 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.

    The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.

    NOTE:

    If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.

  4. Run ripng default-route { only | originate } [ cost cost | tag tag ]*

    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.

  5. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100074760

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