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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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Defining the Current Area as a Stub Area

Defining the Current Area as a Stub Area

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run ospf [ process-id ]

    The OSPF process view is displayed.

  3. Run area area-id

    The OSPF area view is displayed.

  4. Run stub [ no-summary ]

    The current area is configured as a stub area.

    If the parameter no-summary is specified, an ABR is disabled from sending summary LSAs to a stub area. The parameter no-summary takes effect in the area only when the stub command is configured on an ABR.

    To configure an area as a stub area, you need to run the stub command on all switches in the area.

    AS external routes carried in Type 5 LSAs cannot be advertised within a stub area. Therefore, the switches in a stub area learn AS external routes from an ABR. The ABR automatically generates a summary LSA (Type 3 LSA) with the link state ID being 0.0.0.0 and the network mask being 0.0.0.0 and then advertises the LSA in the entire stub area.

  5. (Optional) Run stub default-route-advertise backbone-peer-ignore

    The ABR is disabled from checking the neighbor status of the backbone area before it generates a Type 3 LSA carrying a default route and advertises it to the stub area.

  6. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100074760

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