OSPFv3 Commands 803
Syntax
ipv6 ospf hello-interval 
seconds
no ipv6 ospf hello-interval
•
seconds
 — A valid positive integer which represents the length of time of the OSPF hello 
interval. The value must be the same for all routers attached to a network. (Range: 1-65535 
seconds)
Default Configuration
10 seconds is the default value of 
seconds
.
Command Mode
Interface Configuration (VLAN, Tunnel, Loopback) mode.
User Guidelines
This command has no user guidelines.
Example
The following example sets the OSPF hello interval at 15 seconds.
console(config)#interface vlan 15
console(config-if-vlan15)#ipv6 ospf hello-interval 15
ipv6 ospf mtu-ignore
Use the ipv6 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 Database Description 
packet is rejected and the OSPF adjacency is not established.
Syntax
ipv6 ospf mtu-ignore
no ipv6 ospf mtu-ignore
Default Configuration
Enabled is the default state.