Dell BigIron RX Series, Configuration Manual

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BigIron RX Series Configuration Guide 697
53-1002253-01
Configuring OSPF
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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 on a device, enter the show ip command.
Refer to “Modify virtual link parameters” on page 697 for descriptions of the optional parameters.
Modify virtual link parameters
OSPF has some parameters that you can modify for virtual links. Notice that these are the same
parameters as the ones you can modify for physical interfaces.
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: [no] area <num> | <ip-addr> virtual-link <ip-addr> [authentication-key [0 | 1] <string> ]
[dead-interval <num> ]
[hello-interval <num> ] [md5-authentication key-activation-wait-time <num> | key-id
<num> [0 | 1] key <string> ]
[retransmit-interval <num> ] [transmit-delay <num> ]
The parameters are described below.
Virtual link parameter descriptions
You can modify the following virtual link interface parameters.
Authentication Key This parameter allows you to assign different authentication methods on a
port-by-port basis. OSPF supports three methods of authentication for
each interface—none, simple password, and MD5. Only one method of
authentication can be active on an interface at a time.
The simple password method of authentication requires you to configure
an alphanumeric password on an interface. The password can be up to
eight characters long. The simple password setting takes effect
immediately. All OSPF packets transmitted on the interface contain this
password. All OSPF packets received on the interface are checked for this
password. If the password is not present, then the packet is dropped.
The MD5 method of authentication encrypts the authentication key you
define. The authentication is included in each OSPF packet transmitted.
MD5 Authentication Key When simple authentication is enabled, the key is an alphanumeric
password of up to eight characters. When MD5 is enabled, the key is an
alphanumeric password of up to 16 characters that is later encrypted and
included in each OSPF packet transmitted. You must enter a password in
this field when the system is configured to operate with either simple or
MD5 authentication.
MD5 Authentication Key ID The Key ID is a number from 1 – 255 and identifies the MD5 key that is
being used. This parameter is required to differentiate among multiple
keys defined on a router.