H3C Technologies H3C S7500E Series Switches - Manual (Page 98)

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The DR priority configured with the ospf dr-priority command and the one configured with the peer
command have the following differences:
z The former is for actual DR election.
z The latter is to indicate whether a neighbor has the election right or not. If you configure the DR
priority for a neighbor as 0, the local router will consider the neighbor has no election right, and
thus no hello packet is sent to this neighbor, reducing the number of hello packets for DR/BDR
election on networks. However, if the local router is the DR or BDR, it sends hello packets to the
neighbor with priority 0 for adjacency establishment.
Configuring the OSPF Network Type for an Interface as P2MP
Follow these steps to configure the OSPF network type for an interface as P2MP:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Configure the OSPF network
type for the interface as P2MP
ospf network-type p2mp
[ unicast ]
Required
By default, the network type of an
interface depends on the link layer
protocol.
After you configure the OSPF
network type for an interface as
P2MP unicast, all packets are
unicast over the interface. Thus the
interface cannot broadcast hello
packets to discover neighbors. In
that case, you need to manually
specify the IP address of the
neighboring interface.
Exit to system view quit —
Enter OSPF view
ospf [ process-id | router-id
router-id | vpn-instance
instance-name ] *
—
Specify a neighbor and its DR
priority on a P2MP unicast
network
peer ip-address [ cost value |
dr-priority dr-priority ]
Required if the interface type is
P2MP unicast