Dell Force10 E1200i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 678
Enable fast-convergence
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www.dell.com | support.dell.com FTOS#show ip ospf 34 int GigabitEthernet 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 GigabitEthernet 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# Enable fast-convergence The fast-convergence CLI sets the minimum origination and arrival LSA parameters to zero (0), allowing rapid route calculation. When fast-convergence is disabled, 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. Use the following command in the ROUTER OSPF mode to enable or disable fast-convergence. 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. 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. The following example shows the convergence settings when fast-convergence is enabled and the second example shows settings when fast-convergence is disabled. These displays appear with the show ip ospf command. 678 | Open Shortest Path First (OSPFv2 and OSPFv3)
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