Reference Guide

374 | Open Shortest Path First (OSPFv2)
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Figure 20-13. show ip ospf process-id interface Command Example
Enable Fast-Convergence
The fast-convergence CLI sets the minimum origination and arrival LSA parameters to zero (0), allowing
rapid route calculation. When you disable fast-convergence, origination and arrival LSA parameters are set
to 5 seconds and 1 second, respectively.
Setting the convergence parameter (1-4) indicates the actual convergence level. Each convergence setting
adjusts the LSA parameters to zero, but the fast-convergence parameter setting allows for even finer tuning
of the convergence speed. The higher the number, the faster the convergence.
To enable or disable fast-convergence, use the following command in ROUTER OSPF mode.
Command Syntax Command Mode Usage
fast-convergence {number} CONFIG-ROUTER-OSPF-id Enable OSPF fast-convergence and specify the
convergence level.
Parameter: 1-4
The higher the number, the faster the convergence.
When disabled, the parameter is set at 0 (Figure 20-15).
Note: A higher convergence level can result in occasional loss of OSPF
adjacency. Generally, convergence level 1 meets most convergence
requirements. Higher convergence levels should only be selected following
consultation with Dell Force10 technical support.
FTOS#show ip ospf 34 int
TenGigabitEthernet 0/0 is up, line protocol is down
Internet Address 10.1.2.100/24, Area 1.1.1.1
Process ID 34, Router ID 10.1.2.100, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State DOWN, Priority 1
Designated Router (ID) 10.1.2.100, Interface address 0.0.0.0
Backup Designated Router (ID) 0.0.0.0, Interface address 0.0.0.0
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 13:39:46
Neighbor Count is 0, Adjacent neighbor count is 0
TenGigabitEthernet 0/1 is up, line protocol is down
Internet Address 10.1.3.100/24, Area 2.2.2.2
Process ID 34, Router ID 10.1.2.100, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 10.1.2.100, Interface address 10.1.3.100
Backup Designated Router (ID) 0.0.0.0, Interface address 0.0.0.0
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
No Hellos (Passive interface)
Neighbor Count is 0, Adjacent neighbor count is 0
Loopback 45 is up, line protocol is up
Internet Address 10.1.1.23/24, Area 2.2.2.2
Process ID 34, Router ID 10.1.2.100, Network Type LOOPBACK, Cost: 1
Loopback interface is treated as a stub Host.
FTOS#
Interface is not running the
OSPF protocol.