Configuring Ospf On The Nbma Or P2Mp Network; Establishing The Configuration Task - Huawei S6700 Series Configuration Manual

S6700 Series Ethernet Switches
Configuration Guide - IP Routing

4.4 Configuring OSPF on the NBMA or P2MP Network

This section describes how to configure OSPF and modify attributes on the NBMA or point-to-
multipoint (P2MP) network to flexibly construct the OSPF network.

4.4.1 Establishing the Configuration Task

To implement OSPF functions, configure OSPF on the NBMA or P2MP network.
Applicable Environment
As shown in
protocols.
Table 4-1 Network types supported by OSPF
Network Type
Broadcast
Non-broadcast
multiple access
(NBMA)
Point-to-point
(P2P)
Issue 01 (2012-03-15)
Table 4-1, OSPF classifies networks into four types based on the types of link layer
NOTE
Differentiated OSPF configurations that are applicable to the NBMA network and P2MP network are
provided in this section.The OSPF configurations not provided here are applicable to the four types of
networks.
Characteristic
On the broadcast network, Hello
packets, LSU packets, and LSAck
packets are multicasted; DD
packets and LSR packets are
unicasted.
On an NBMA network, Hello
packets, DD packets, LSR
packets, LSU packets, and LSAck
packets are unicasted.
The NBMA network must be fully
meshed. Any two switches on the
NBMA network must be directly
reachable.
On a P2P network, Hello packets,
DD packets, LSR packets, LSU
packets, and LSAck packets are
multicasted.
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4 OSPF Configuration
Default Configuration
If the link layer protocol is
Ethernet or Fiber Distributed Data
Interface (FDDI), OSPF regards
the network as a broadcast
network by default.
If the link layer protocol is ATM,
OSPF regards the network as an
NBMA network by default.
If the link layer protocol is PPP,
HDLC, or Link Access Procedure
Balanced (LAPB), OSPF regards
the network as a P2P network by
default.
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