Administrator Guide

Examples of Setting and Viewing a Dead Interval
In the following example, the dead interval is set at 4x the hello interval (shown in bold).
Dell(conf)#int gigabitethernet 2/2
Dell(conf-if-gi-2/2)#ip ospf hello-interval 20
Dell
(conf-if-gi-2/2)#ip ospf dead-interval 80
Dell(conf-if-gi-2/2)#
In the following example, the dead interval is set at 4x the hello interval (shown in bold).
Dell (conf-if-gi-2/2)#ip ospf dead-interval 20
Dell (conf-if-gi-2/2)#do show ip os int gigabitethernet 1/3
GigabitEthernet 2/2 is up, line protocol is up
Internet Address 20.0.0.1/24, Area 0
Process ID 10, Router ID 1.1.1.2, Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 1.1.1.2, Interface address 30.0.0.1
Backup Designated Router (ID) 1.1.1.1, Interface address 30.0.0.2
Timer intervals configured, Hello 20, Dead 80, Wait 20, Retransmit 5
Hello due in 00:00:04
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 1.1.1.1 (Backup Designated Router)
Dell (conf-if-gi-2/2)#
Conguration Information
The interfaces must be in Layer 3 mode (assigned an IP address) and enabled so that they can send and receive trac. The OSPF process
must know about these interfaces.
To make the OSPF process aware of these interfaces, they must be assigned to OSPF areas.
You must congure OSPF GLOBALLY on the system in CONFIGURATION mode.
NOTE
: Loop back routes are not installed in the Route Table Manager (RTM) as non-active routes.
OSPF features and functions are assigned to each router using the CONFIG-INTERFACE commands for each interface.
NOTE
: By default, OSPF is disabled.
Conguration Task List for OSPFv2 (OSPF for IPv4)
You can perform the following tasks to congure Open Shortest Path First version 2 (OSPF for IPv4) on the switch. Two of the tasks are
mandatory; others are optional.
The following conguration tasks include two mandatory tasks and several optional tasks:
• Enabling OSPFv2 (mandatory)
• Assigning a Router ID
• Assigning an OSPFv2 Area (mandatory)
• Enable OSPFv2 on Interfaces
• Conguring Stub Areas
• Enabling Passive Interfaces
• Enabling Fast-Convergence
• Changing OSPFv2 Parameters on Interfaces
• Enabling OSPFv2 Authentication
• Creating Filter Routes
• Applying Prex Lists
• Redistributing Routes
548
Open Shortest Path First (OSPFv2 and OSPFv3)