D-Link xStack DGS-3610 Series User Manual

Chapter 28 OSPF Routing Protocol Configuration DGS-3610 Series Configuration Guide
28-8
commands, you can allow X.25 and frame relay to have the broadcast capability, so that the
OSPF can see the networks like X.25 and frame relay as the broadcast networks.
The point-to-multipoint network interface can be seen as the marked point-to-point interface
of one or multiple neighbors. When the OSPF is configured as the point-to-multipoint
network type, multiple host routes will be created. The point-to-multipoint network has the
following advantages over the NBMA network:
 Easy configuration, no needing to configure the neighbors, neither election of the
designated router;
 Small cost, no needing the fully meshed topology
To configure the network type, execute the following commands in the interface
configuration mode:
Command
Function
DGS-3610(config-if)# ip ospf network
{broadcast | non-broadcast | point-to-point |
{point-to-multipoint [non-broadcast]} }
Configure the OSPF network type
For different link encapsulation types, the default network type is shown as below:
 Point-to-point network type
 PPP, SLIP, frame relay point-to-point sub-interface, X.25 point-to-point sub-interface
encapsulation
 NBMA (non-broadcast) network type
Frame relay, X.25 encapsulation (except point-to-point sub-interface)
 Broadcast network type
Ethernet encapsulation
 The default type is not the point-to-multipoint network type
It should be noted that the types of networks at both sides should be consistent with each
other for the configuration. Otherwise, the neighbor Full may appear and the calculation of
the routing is incorrect.
28.2.3.2 Configuring Point-to-Multipoint, Broadcast
Network
When routers are connected via X.25 and frame relay networks, if the network is not a fully
meshed network or you do not want the election of the designated router, you can set the
OSPF interface network type as the point-to-multipoint type. Since the point-to-multipoint
network takes the link as a point-to-point link, multiple host routes will be created. In addition,
all the neighbors have the same cost in the point-to-multiple networks. If you want to make
different neighbors have different costs, you can set them by using the neighbor command.
To configure the point-to-multipoint network type, execute the following commands in the
interface configuration mode:

D-Link xStack DGS-3610 Series Specifications

General

Brand	D-Link
Model	xStack DGS-3610 Series
Category	Switch
Language	English