Switch 7700 Command reference Guide, v2.0

OSPF Configuration Commands 153
■ Non-Broadcast Muli-access (nbma): If Frame Relay, ATM, HDLC or X.25 is
adopted, OSPF defaults the network type to NBMA.
■ Point-to-Multipoint (p2mp): OSPF will not default the network type of any link
layer protocol to p2mp. The general undertaking is to change a partially
connected NBMA network to p2mp network if the NBMA network is not
fully-meshed.
■ Point-to-point (p2p): If PPP, LAPB or POS is adopted, OSPF defaults the network
type to p2p.
NBMA means that a network is non-broadcast and multi-accessible. ATM is a
typical example for it. The user can configure the polling interval to specify the
interval of sending polling hello packets before the adjacency of the neighboring
routers is formed.
Configure the interface type to nonbroadcast on a broadcast network without
multi-access capability.
Configure the interface type to p2mp if not all the routers are directly accessible
on an NBMA network.
Change the interface type to p2p if the router has only one peer on the NBMA
network.
When the network type of an interface is NBMA or it is changed to NBMA
manually, the peer command must be used to configure the neighboring point.
Related command: ospf dr-priority.
Example
Set the interface Vlan-interface 1 to NBMA type.
[SW7700]interface Vlan-interface 1
[SW7700-Vlan-interface1]ospf network-type nbma
ospf timer dead Syntax
ospf timer dead seconds
undo ospf timer dead
View
VLAN interface view
Parameter
seconds Enter the amount of dead time allowed, in seconds, in the range 1 to
65535.
Description
Using the ospf timer dead command, you can configure the amount of dead
time allowed to OSPF neighbors, in seconds.
Using the undo ospf timer dead command, you can restore the default value.
By default, the dead time allowed to OSPF neighbors is 40 seconds.