ProLiant BL p-Class GbE2 Interconnect Switch Application Guide
OSPF 119
2. Configure a simple text password up to eight characters for each OSPF IP interface in Area 0 on switches
1, 2, and 3.
>> # /cfg/l3/ospf/if 1
>> OSPF Interface 1 # key test
>> OSPF Interface 1 # ../if 2
>> OSPF Interface 2 # key test
>> OSPF Interface 1 # ../if 3
>> OSPF Interface 3 # key test
3. Enable OSPF authentication for Area 2 on switch 4.
>> # /cfg/l3/ospf/aindex 2/auth password
4. Configure a simple text password up to eight characters for the virtual link between Area 2 and Area 0 on
switches 2 and 4.
>> # /cfg/l3/ospf/virt 1/key packard
Use the following commands to configure MD5 authentication on the switches shown in the figure:
1. Enable OSPF MD5 authentication for Area 0 on switches 1, 2, and 3
>> # /cfg/l3/ospf/aindex 0/auth md5
2. Configure MD5 key ID for Area 0 on switches 1, 2, and 3.
>> # /cfg/l3/ospf/md5key 1/key test
3. Assign MD5 key ID to OSPF interfaces on switches 1, 2, and 3.
>> # /cfg/l3/ospf/if 1
>> OSPF Interface 1 # mdkey 1
>> OSPF Interface 1 # ../if 2
>> OSPF Interface 2 # mdkey 1
>> OSPF Interface 1 # ../if 3
>> OSPF Interface 3 # mdkey 1
4. Enable OSPF MD5 authentication for Area 2 on switch 4.
>> # /cfg/l3/ospf/aindex 2/auth md5
5. Configure MD5 key for the virtual link between Area 2 and Area 0 on switches 2 and 4.
>> # /cfg/l3/ospf/md5key 2/key packard
6. Assign MD5 key ID to OSPF virtual link on switches 2 and 4.
>> # /cfg/l3/ospf/virt 1/mdkey 2
Host routes for load balancing
GbE2 software implementation of OSPF includes host routes. Host routes are used for advertising network device
IP addresses to external networks, accomplishing the following goals:
• ABR Load Sharing
As a form of load balancing, host routes can be used for dividing OSPF traffic among multiple ABRs. To
accomplish this, each switch provides identical services but advertises a host route for a different IP address
to the external network. If each IP address serves a different and equal portion of the external world,
incoming traffic from the upstream router should be split evenly among ABRs.
• ABR Failover
Complementing ABR load sharing, identical host routes can be configured on each ABR. These host routes
can be given different costs so that a different ABR is selected as the preferred route for each server and the
others are available as backups for failover purposes.