Configuring Ospf Interface Parameters - Cisco Catalyst 6500 Series Configuration Manual

Chapter 8 Configuring IP Addresses, Routing, and DHCP

Configuring OSPF Interface Parameters

Single context mode only
Routed firewall mode only
You can alter some interface-specific OSPF parameters as necessary. You are not required to alter any
of these parameters, but the following interface parameters must be consistent across all routers in an
attached network: ip ospf hello-interval, ip ospf dead-interval, and ip ospf authentication-key. Be
sure that if you configure any of these parameters, the configurations for all routers on your network
have compatible values.
To configure OSPF interface parameters, follow these steps:
To enter the interface configuration mode, enter the following command:
Step 1
FWSM(config)# interface interface_name
Step 2 Enter any of the following commands:
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OL-6392-01
To specify the authentication type for an interface, enter the following command:
FWSM(config-interface)# ospf authentication [message-digest | null]
To assign a password to be used by neighboring OSPF routers on a network segment that is using
the OSPF simple password authentication, enter the following command:
FWSM(config-interface)# ospf authentication-key key
The key can be any continuous string of characters up to 8 bytes in length.
The password created by this command is used as a key that is inserted directly into the OSPF header
when the FWSM software originates routing protocol packets. A separate password can be assigned
to each network on a per-interface basis. All neighboring routers on the same network must have the
same password to be able to exchange OSPF information.
To explicitly specify the cost of sending a packet on an OSPF interface, enter the following
command:
FWSM(config-interface)# ospf cost cost
The cost is an integer from 1 to 65535.
To set the number of seconds that a device must wait before it declares a neighbor OSPF router down
because it has not received a hello packet, enter the following command:
FWSM(config-interface)# ospf dead-interval seconds
The value must be the same for all nodes on the network.
To specify the length of time between the hello packets that the FWSM sends on an OSPF interface,
enter the following command:
FWSM(config-interface)# ospf hello-interval seconds
The value must be the same for all nodes on the network.
Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide
Configuring OSPF
8-9