HP 6125XLG - Configuring an OSPF NSSA Area

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[SwitchA-ospf-1-area-0.0.0.1] quit
# Display OSPF routing information on Switch C.
[SwitchC] display ospf routing
OSPF Process 1 with Router ID 10.4.1.1
Routing Tables
Routing for Network
Destination Cost Type NextHop AdvRouter Area
0.0.0.0/0 4 Inter 10.2.1.1 10.2.1.1 0.0.0.1
10.2.1.0/24 3 Transit 10.2.1.2 10.4.1.1 0.0.0.1
10.4.1.0/24 3 Stub 10.4.1.1 10.4.1.1 0.0.0.1
Total Nets: 3
Intra Area: 2 Inter Area: 1 ASE: 0 NSSA: 0
After this configuration, inter-area routes are removed, and only one external route (a default route)
exists.
Configuring an OSPF NSSA area
Network requirements
• Configure OSPF on all switches and split AS into three areas.
• Configure Switch A and Switch B as ABRs to forward routing information between areas.
• Configure Area 1 as an NSSA area and configure Switch C as an ASBR to redistribute static routes
into the AS.
Figure 24 Network diagram
Configuration procedure
1. Configure IP addresses for interfaces.
2. Enable OSPF (see "Configuring basic OSPF").
3. Configu
re Area 1 as an NSSA area:
# Configure Switch A.
<SwitchA> system-view
[SwitchA] ospf
[SwitchA-ospf-1] area 1