3Com Switch 7750 Configuration Guide Guide

298 CHAPTER 34: OSPF CONFIGURATION
■ Configuring the network layer address of the interface so that the adjacent
node is reachable at network layer
■ Performing basic OSPF configuration
Configuring the
Network Type of an
OSPF Interface
n
■ After an interface has been configured with a new network type, the original
network type of the interface is removed automatically.
■ Note that, neighboring relationship can be established between two interfaces
configured as broadcast, NBMA, or P2MP only if the interfaces are on the same
network segment.
Setting an NBMA
Neighbor
Some special configurations need to be done on an NBMA network. Since an
NBMA interface cannot discover the adjacent router by broadcasting Hello
packets, you must manually specify the IP address of the adjacent router for the
interface and whether the adjacent router has the right to vote.
Setting the DR Priority
on an OSPF Interface
You can control the DR/BDR election on a broadcast or NBMA network by
configuring the DR priorities of interfaces.
Tabl e 215 Configure the network type of an OSPF interface
Operation Command Description
Enter system view system-view -
Enter interface view
interface interface-type
interface-number
-
Configure the network type
of the OSPF interface
ospf network-type {
broadcast | nbma | p2mp |
p2p }
Optional
By default, the network type
of an interface depends on
the physical interface.
Tabl e 216 Set NBMA neighbor
Operation Command Description
Enter system view system-view -
Enter OSPF view
ospf [ process-id [ router-id
router-id ] ]
Required
Set an NBMA neighbor
peer ip-address [ dr-priority
dr-priority ]
Required
By default, the priority for the
neighbor of an NBMA
interface is 1.
Tabl e 217 Set the DR priority on an OSPF interface
Operation Command Description
Enter system view system-view -
Enter interface view
interface interface-type
interface-number
Required
Set the DR priority on the
OSPF interface
ospf dr-priority priority
Optional
The default DR priority is 1.