162 
ospf mtu-enable 
Use ospf mtu-enable to enable an interface to add the interface MTU into DD packets. 
Use undo ospf mtu-enable to restore the default. 
Syntax 
ospf mtu-enable 
undo ospf mtu-enable 
Default 
The MTU in DD packets is 0. 
Views 
Interface view 
Predefined user roles 
network-admin 
Usage guidelines 
After a virtual link is established through a tunnel, two devices on the link from different vendors might 
have different MTU values. To make them consistent, restore the interfaces' MTU to the default value 0. 
After you configure this command, the interface checks whether the MTU in a received DD packet is 
greater than its own MTU. If yes, the interface discards the packet. 
Examples 
# Enable VLAN-interface 10 to add the interface MTU value into DD packets. 
<Sysname> system-view 
[Sysname] interface vlan-interface 10 
[Sysname-Vlan-interface10] ospf mtu-enable 
ospf network-type 
Use ospf network-type to set the network type for an interface.  
Use undo ospf network-type to restore the default network type for an interface. 
Syntax 
ospf network-type { broadcast | nbma | p2mp [ unicast ] | p2p [ peer-address-check ] } 
undo ospf network-type 
Default 
By default, the network type of an interface depends on its link layer protocol: 
•  For Ethernet and FDDI, the network type is broadcast. 
•  For ATM, FR, and X.25, the network type is NBMA. 
•  For PPP, LAPB, HDLC, and POS, the network type is P2P. 
Views 
Interface view