R2511-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V5)

Figure 22 Network diagram

Configuration procedure

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

2. Configuring OSPF basic functions (see "Configuring OSPF basic functions").

3. Configu

re Area 1 as an NSSA area:

# Configure Router A.

<RouterA> system-view

[RouterA] ospf

[RouterA-ospf-1] area 1

[RouterA-ospf-1-area-0.0.0.1] nssa

[RouterA-ospf-1-area-0.0.0.1] quit

# Configure Router C.

<RouterC> system-view

[RouterC] ospf

[RouterC-ospf-1] area 1

[RouterC-ospf-1-area-0.0.0.1] nssa

[RouterC-ospf-1-area-0.0.0.1] quit

[RouterC-ospf-1] quit

NOTE:

• To allow Router C in the NSSA area to reach other areas within the AS, you must provide the

keyword default-route-advertise for the nssa command issued on Router A (the ABR) so Router C

can obtain a default route.

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

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

# Display routing information on Router C

[RouterC] display ospf routing

OSPF Process 1 with Router ID 10.4.1.1

Routing Tables

Routing for Network

Destination Cost Type NextHop AdvRouter Area

10.2.1.0/24 3 Transit 10.2.1.2 10.4.1.1 0.0.0.1