Huawei Quidway S6500 Series Operation Manual page 175

Operation Manual - Routing Protocol
Quidway S6500 Series Ethernet Switches
4.2.4 Configuring Router ID
Router ID is a 32-bit unsigned integer that uniquely identifies a router within an AS.
Router ID can be configured manually. If Router ID is not configured, the system will
select the IP address of an interface automatically. When you do that manually, you
must guarantee that the IDs of any two routers in the AS are unique. A common
undertaking is to set the router ID to be the IP address of an interface on the router.
Perform the following configurations in system view.
Table 4-4 Configuring router ID
Configure Router ID
Remove the router ID
To ensure stability of OSPF, the user should determine the division of router IDs and
manually configure them when implementing network planning.
4.2.5 Configuring the Network Type on the OSPF Interface
The route calculation of OSPF is based upon the topology of the adjacent network of
the local router. Each router describes the topology of its adjacent network and
transmits it to all the other routers.
OSPF divides networks into four types by link layer protocol:
Broadcast: If Ethernet or FDDI is adopted, OSPF defaults the network type to
broadcast.
Non-Broadcast Multi-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 connected.
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.
Operation
Huawei Technologies Proprietary
4-7
Chapter 4 OSPF Configuration
Command
router id router-id
undo router id