Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.0P1 - Page 624

Changing OSPFv2 Parameters on Interfaces In Dell Networking OS, you can modify the OSPF settings on the interfaces. Some interface parameter values must be consistent across all interfaces to avoid routing errors. For example, set the same time interval for the hello packets on all routers in the OSPF network to prevent misconfiguration of OSPF neighbors. To change OSPFv2 parameters on the interfaces, use any or all of the following commands. • Change the cost associated with OSPF traffic on the interface. CONFIG-INTERFACE mode ip ospf cost • cost: The range is from 1 to 65535 (the default depends on the interface speed). • Change the time interval the router waits before declaring a neighbor dead. CONFIG-INTERFACE mode ip ospf dead-interval seconds • seconds: the range is from 1 to 65535 (the default is 40 seconds). The dead interval must be four times the hello interval. The dead interval must be the same on all routers in the OSPF network. • Change the time interval between hello-packet transmission. CONFIG-INTERFACE mode ip ospf hello-interval seconds • seconds: the range is from 1 to 65535 (the default is 10 seconds). The hello interval must be the same on all routers in the OSPF network. • Use the MD5 algorithm to produce a message digest or key, which is sent instead of the key. CONFIG-INTERFACE mode ip ospf message-digest-key keyid md5 key • keyid: the range is from 1 to 255. • Key: a character string. NOTE: Be sure to write down or otherwise record the key. You cannot learn the key after it is configured. You must be careful when changing this key. NOTE: You can configure a maximum of six digest keys on an interface. Of the available six digest keys, the switches select the MD5 key that is common. The remaining MD5 keys are unused. • Change the priority of the interface, which is used to determine the Designated Router for the OSPF broadcast network. CONFIG-INTERFACE mode ip ospf priority number • number: the range is from 0 to 255 (the default is 1). • Change the retransmission interval between LSAs. CONFIG-INTERFACE mode ip ospf retransmit-interval seconds 624 Open Shortest Path First (OSPFv2 and OSPFv3)