Layer 3 Routing Commands 1661
console(config-if-vlan1)#ip ospf dead-interval 30
ip ospf hello-interval
Use the ip ospf hello-interval command in Interface Configuration mode to
set the OSPF hello interval for the specified interface. Use the no form of the
command to return the interval to the default value.
Syntax
ip ospf hello-interval seconds
no ip ospf hello-interval
• seconds — Number of seconds to wait before sending Hello packets from
the interface. (Range: 1–65535)
Default Configuration
10 is the default number of seconds.
Command Mode
Interface Configuration (VLAN) mode.
User Guidelines
The value for the length of time must be the same for all routers attached to a
network.
Example
The following example sets the OSPF hello interval at 30 seconds.
console(config-if-vlan1)#ip ospf hello-interval 30
ip ospf mtu-ignore
Use the ip ospf mtu-ignore command in Interface Configuration mode to
disable OSPF maximum transmission unit (MTU) mismatch detection.
OSPF Database Description packets specify the size of the largest IP packet
that can be sent without fragmentation on the interface. When a router
receives a Database Description packet, it examines the MTU advertised by
the neighbor. By default, if the MTU is larger than the router can accept, the
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