3Com S7902E Command Reference Manual - page 782
1-50
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:
z
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.
z
This configuration is not supported on the null interface.
Examples
# Enable the interface to add the real MTU value into DD packets.
[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.
z
For Ethernet, and FDDI, the default network type is broadcast.
z
For ATM, FR, and X.25, the default network type is NBMA.
z
For PPP, LAPB, HDLC, and POS, the default network type is P2P.
Note that:
z
If a router on a broadcast network does not support multicast, you can configure the interface’s
network type as NBMA.
z
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.