Setup Guide

In the following example, the dead interval is set at 4x the hello interval (shown in bold).
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
• Troubleshooting OSPFv2
1 Congure a physical interface. Assign an IP address, physical or Loopback, to the interface to enable Layer 3 routing.
2 Enable OSPF globally. Assign network area and neighbors.
3 Add interfaces or congure other attributes.
4 Set the time interval between when the switch receives a topology change and starts a shortest path rst (SPF) calculation.
Use timers spf delay holdtime
NOTE
: To set the interval time between the reception of topology changes and calculation of SPF in milli seconds, use
the timers spf delay holdtime msec command.
Example
DellEMC#
DellEMC#conf
DellEMC(conf)#router ospf 1
DellEMC(conf-router_ospf-1)#timer spf 2 5 msec
DellEMC(conf-router_ospf-1)#
DellEMC(conf-router_ospf-1)#show config
594
Open Shortest Path First (OSPFv2 and OSPFv3)