Layer 3 Routing Commands 1661console(config-if-vlan1)#ip ospf dead-interval 30ip ospf hello-intervalUse the ip ospf hello-interval command in Interface Configuration mode toset the OSPF hello interval for the specified interface. Use the no form of thecommand to return the interval to the default value.Syntaxip ospf hello-interval secondsno ip ospf hello-interval• seconds — Number of seconds to wait before sending Hello packets fromthe interface. (Range: 1–65535)Default Configuration10 is the default number of seconds.Command ModeInterface Configuration (VLAN) mode.User GuidelinesThe value for the length of time must be the same for all routers attached to anetwork.ExampleThe following example sets the OSPF hello interval at 30 seconds.console(config-if-vlan1)#ip ospf hello-interval 30ip ospf mtu-ignoreUse the ip ospf mtu-ignore command in Interface Configuration mode todisable OSPF maximum transmission unit (MTU) mismatch detection.OSPF Database Description packets specify the size of the largest IP packetthat can be sent without fragmentation on the interface. When a routerreceives a Database Description packet, it examines the MTU advertised bythe neighbor. By default, if the MTU is larger than the router can accept, the
