R0106-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V7)

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OSPFv3 NSSA area configuration example

Network requirements

• Configure OSPFv3 on all routers and split the AS into three areas.

• Configure Router B and Router C as ABRs to forward routing information between areas.

• Configure Area 1 as an NSSA area and configure Router A as an ASBR to redistribute static routes

into the AS.

Figure 95 Network diagram

Configuration procedure

1. Configure IPv6 addresses for interfaces. (Details not shown.)

2. Configure basic OSPFv3 (see "OSPFv3 stub area configuration example").

3. Configur

e Area 1 as an NSSA area:

# Configure Router A.

<RouterA> system-view

[RouterA] ospfv3

[RouterA-ospfv3-1] area 1

[RouterA-ospfv3-1-area-0.0.0.2] nssa

[RouterA-ospfv3-1-area-0.0.0.2] quit

[RouterA-ospfv3-1] quit

# Configure Router B.

<RouterB> system-view

[RouterB] ospfv3

[RouterB-ospfv3-1] area 1

[RouterB-ospfv3-1-area-0.0.0.2] nssa

[RouterB-ospfv3-1-area-0.0.0.2] quit

[RouterB-ospfv3-1] quit

NOTE:

• To allow Router A in the NSSA area to reach other areas within the AS, Router A needs to obtain

a default route. You must provide the keyword default-route-advertise for the nssa command

issued on Router B (the ABR) so that Router A can obtain a default route.

• Configuring the nssa command with the keyword no-summary on Router B can reduce the routin

table size on NSSA routers. On other NSSA routers, you only need to configure the nssa command.