IP Routing Features
Configuring OSPF
To configure the virtual link on Routing Switch-C, enter the following
commands:
HPswitch(ospf)# area 1 virtual-link 10.0.0.1
HPswitch(ospf)# write memory
Syntax: area <ip-addr> | <num> virtual-link <router-id>
The area < ip-addr > | < num > parameter specifies the transit area.
The <router-id> parameter specifies the router ID of the OSPF router at the
remote end of the virtual link. To display the router ID, enter the show ip
command.
See “Modify Virtual Link Parameters” below for descriptions of the optional
parameters.
Modifying Virtual Link Parameters
OSPF has some parameters that you can modify for virtual links. Notice that
these are a subset of the parameters that you can modify for physical inter-
faces. cost is not configured for virtual links, it is calculated by route calcula-
tion.
You can modify default values for virtual links using the following CLI
command at the OSPF router level of the CLI, as shown in the following
syntax:
Syntax: area < num > | < ip-addr > virtual-link < ip-addr > [authentication-key
< string >| md5-auth-key-chain < chain-name-str >] [dead-interval < num >] [hello-
interval < num >] [retransmit-interval < num >] [transmit-delay < num >]
The parameters are described below. For syntax information, at the CLI
prompt, enter the command area help.
Virtual Link Parameter Descriptions
You can modify the following virtual link interface parameters:
Authentication Key: OSPF supports two methods of authentication for each
virtual link—simple password and MD5. In addition, the value can be set to
none, meaning no authentication is performed. Only one method of authenti-
cation can be active on a subnet at a time. The default authentication value is
none. The two authentication methods are configured by different commands:
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