Cisco Catalyst 6500 Series Configuration Manual page 132

Configuring OSPF
To enable OSPF MD5 authentication, enter the following command:
•
FWSM(config-interface)# ospf message-digest-key key_id md5 key
Set the following values:
–
–
Usually, one key per interface is used to generate authentication information when sending packets
and to authenticate incoming packets. The same key identifier on the neighbor router must have the
same key value.
We recommend that you not keep more than one key per interface. Every time you add a new key,
you should remove the old key to prevent the local system from continuing to communicate with a
hostile system that knows the old key. Removing the old key also reduces overhead during rollover.
To set the priority to help determine the OSPF designated router for a network, enter the following
•
command:
FWSM(config-interface)# ospf priority number_value
The number_value is between 0 to 255.
To specify the number of seconds between link-state advertisement (LSA) retransmissions for
•
adjacencies belonging to an OSPF interface, enter the following command:
FWSM(config-interface)# ospf retransmit-interval seconds
The seconds must be greater than the expected round-trip delay between any two routers on the
attached network. The range is from 1 to 65535 seconds. The default is 5 seconds.
To set the estimated number of seconds required to send a link-state update packet on an OSPF
•
interface, enter the following command:
FWSM(config-interface)# ospf transmit-delay seconds
The seconds is from 1 to 65535 seconds. The default is 1 second.
This example shows how to configure the OSPF interfaces:
FWSM(config)# router ospf 2
FWSM(config-router)# network 2.0.0.0 255.0.0.0 area 0
FWSM(config-router)# interface inside
FWSM(config-interface)# ospf cost 20
FWSM(config-interface)# ospf retransmit-interval 15
FWSM(config-interface)# ospf transmit-delay 10
FWSM(config-interface)# ospf priority 20
FWSM(config-interface)# ospf hello-interval 10
FWSM(config-interface)# ospf dead-interval 40
FWSM(config-interface)# ospf authentication-key cisco
FWSM(config-interface)# ospf message-digest-key 1 md5 cisco
FWSM(config-interface)# ospf authentication message-digest
Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide
8-10
key_id—An identifier in the range from 1 to 255.
key—Alphanumeric password of up to 16 bytes.
Chapter 8 Configuring IP Addresses, Routing, and DHCP
OL-6392-01