Dell S6100 Configuration Manual page 583

After the OSPF process and the VRF are tied together, the OSPF process ID cannot be used again in the system.
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.
You can assign the area in the following step by a number or with an IP interface address.
• Enable OSPFv2 on an interface and assign a network address range to a specific OSPF area.
CONFIG-ROUTER-OSPF-id mode
Open Shortest Path First (OSPFv2 and OSPFv3) 583