Ospf Stub Area Configuration Example - HP 5500 EI series Configuration Manual

0.0.0.0/32
10.1.1.0/24
10.2.1.0/24
10.3.1.0/24
10.4.1.0/24
11.2.1.0/24
11.2.1.0/32
11.2.1.2/32
11.2.1.255/32
127.0.0.0/8
127.0.0.0/32
127.0.0.1/32
127.255.255.255/32
224.0.0.0/4
224.0.0.0/24
255.255.255.255/32
5. Configure route summarization:
# Configure route summarization on Router B to advertise a single route 10.0.0.0/8.
[RouterB-ospf-1] asbr-summary 10.0.0.0 8
# Display the IP routing table on Router A.
[RouterA] display ip routing-table
Destination/Mask
0.0.0.0/32
10.0.0.0/8
11.2.1.0/24
11.2.1.0/32
11.2.1.2/32
11.2.1.255/32
127.0.0.0/8
127.0.0.0/32
127.0.0.1/32
127.255.255.255/32
224.0.0.0/4
224.0.0.0/24
255.255.255.255/32
The output shows that routes 10.1.1.0/24, 10.2.1.0/24, 10.3.1.0/24 and 10.4.1.0/24 are
summarized into a single route 10.0.0.0/8.

OSPF stub area configuration example

Network requirements
• Enable OSPF on all routers, and split the AS into three areas.
Configure Router A and Router B as ABRs to forward routing information between areas.
•
Direct 0
OSPF 150
OSPF 150
OSPF 150
OSPF 150
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Destinations : 13
Proto Pre
Direct 0
OSPF 150
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
Direct 0
0 127.0.0.1
1 11.2.1.1
1 11.2.1.1
1 11.2.1.1
1 11.2.1.1
0 11.2.1.2
0 11.2.1.2
0 127.0.0.1
0 11.2.1.2
0 127.0.0.1
0 127.0.0.1
0 127.0.0.1
0 127.0.0.1
0 0.0.0.0
0 0.0.0.0
0 127.0.0.1
Routes : 13
Cost NextHop
0 127.0.0.1
2 11.2.1.1
0 11.2.1.2
0 11.2.1.2
0 127.0.0.1
0 11.2.1.2
0 127.0.0.1
0 127.0.0.1
0 127.0.0.1
0 127.0.0.1
0 0.0.0.0
0 0.0.0.0
0 127.0.0.1
102
InLoop0
Eth1/1
Eth1/1
Eth1/1
Eth1/1
Eth1/1
Eth1/1
InLoop0
Eth1/1
InLoop0
InLoop0
InLoop0
InLoop0
NULL0
NULL0
InLoop0
Interface
InLoop0
Eth1/1
Eth1/1
Eth1/1
InLoop0
Eth1/1
InLoop0
InLoop0
InLoop0
InLoop0
NULL0
NULL0
InLoop0