Ospf Network-Type - 3Com S7906E Command Reference Manual

Use the undo ospf mtu-enable command to restore the default.
By default, an interface adds a MTU of 0 into DD packets, that is, no real MTU is added.
Note that:
After a virtual link is established via a Tunnel, two devices on the link from different vendors may
have different MTU values. To make them consistent, set the attached interfaces' default MTU to 0.
This configuration is not supported on the null interface.
Examples
# Enable the interface to add the real MTU value into DD packets.
<Sysname> system-view
[Sysname] interface vlan-interface 10
[Sysname-Vlan-interface10] ospf mtu-enable

ospf network-type

Syntax
ospf network-type { broadcast | nbma | p2mp | p2p }
undo ospf network-type
View
Interface view
Default Level
2: System level
Parameters
broadcast: Specifies the network type as Broadcast.
nbma: Specifies the network type as NBMA.
p2mp: Specifies the network type as P2MP.
p2p: Specifies the network type as P2P.
Description
Use the ospf network-type command to set the network type for an interface.
Use the undo ospf network-type command to restore the default network type for an interface.
By default, the network type of an interface depends on its link layer protocol.
For Ethernet, and FDDI, the default network type is broadcast.
For ATM, FR, and X.25, the default network type is NBMA.
For PPP, LAPB, HDLC, and POS, the default network type is P2P.
Note that:
If a router on a broadcast network does not support multicast, you can configure the interface's
network type as NBMA.
If any two routers on an NBMA network are directly connected via a virtual link, that is, the network
is fully meshed, you can configure the network type as NBMA; otherwise you need to configure it as
P2MP for two routers having no direct link to exchange routing information via another router.
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