Dell S4048T, Configuration Manual

Page: 721 / 1277

If you try to enter an OSPF process ID, or if you try to enable more OSPF processes than available Layer
3 interfaces, prior to assigning an IP address to an interface and setting the
no shutdown
command,
the following message displays:
Dell(conf)#router ospf 1
% Error: No router ID available.
Assigning a Router ID
In CONFIGURATION ROUTER OSPF mode, assign the router ID.
The router ID is not required to be the router’s IP address. However, Dell Networking recommends using the
IP address as the router ID for easier management and troubleshooting. Optional
process-id
commands
are also described.
• Assign the router ID for the OSPFv2 process.
CONFIG-ROUTER-OSPF-id mode
router-id ip address
• Disable OSPF.
CONFIGURATION mode
no router ospf process-id
• Reset the OSPFv2 process.
EXEC Privilege mode
clear ip ospf process-id
• View the current OSPFv2 status.
EXEC mode
show ip ospf process-id
Example of Viewing the Current OSPFv2 Status
Dell#show ip ospf 55555
Routing Process ospf 55555 with ID 10.10.10.10
Supports only single TOS (TOS0) routes
SPF schedule delay 5 secs, Hold time between two SPFs 10 secs
Number of area in this router is 0, normal 0 stub 0 nssa 0
Dell#
Assigning an OSPFv2 Area
After you enable OSPFv2, assign the interface to an OSPF area. Set up OSPF areas and enable OSPFv2 on an
interface with the
network
command.
You must have at least one AS area: Area 0. This is the backbone area. If your OSPF network contains more
than one area, configure a backbone area (Area ID 0.0.0.0). Any area besides Area 0 can have any number ID
assigned to it.
The OSPFv2 process evaluates the
network
commands in the order they are configured. Assign the network
address that is most explicit first to include all subnets of that address. For example, if you assign the network
address 10.0.0.0 /8, you cannot assign the network address 10.1.0.0 /16 because it is already included in the
first network address.
When configuring the
network
command, configure a network address and mask that is a superset of the IP
subnet configured on the Layer-3 interface for OSPFv2 to use.
Open Shortest Path First (OSPFv2 and OSPFv3) 721