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3Com Switch 7750 Series
Command Reference Guide – Routing Protocol Chapter 3 OSPF Configuration Commands
3-43
If there is any router not supporting multicast addresses on a broadcast network, the
network type of the interface can be changed to NBMA. Alternatively, the network type
of the interface can be changed from NBMA to broadcast.
For a non-broadcast multi-accessible network to be of NBMA type, any two routers in
the network must be directly reachable to each other through a virtual circuit. In other
words, the network must be fully-meshed.
For a network not meeting this condition, the network type of the interface must be
changed to point-to-multipoint. In this way, routing information can be exchanged
between two routers not directly reachable to each other through another router that is
directly reachable to the two routers.
If only two routers run OSPF in the same network segment, the network type of the
interface can also be changed to point-to-point.
Note that you must use the peer command to configure the peer if the network type of
the interface is NBMA or manually changed to NBMA with the ospf network-type
command.
Related command: ospf dr-priority.
Example
# Set the interface Vlan-interface 10 to NBMA type.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] interface Vlan-interface 10
[3Com-Vlan-interface10] ospf network-type nbma
3.1.37 ospf timer dead
Syntax
ospf timer dead seconds
undo ospf timer dead
View
Interface view
Parameter
seconds: Dead interval of the OSPF neighbor. It is in seconds and ranges from 1 to
65535.
Description
Use the ospf timer dead command to configure the dead interval of the OSPF peer.