Black Box LRU4240 - Manual (Page 186)

174 SALES: 0870 90 10 750 Dual Trunk E1 Router User’s Guide
Dual Trunk E1 Router
ip ospf dead-interval, show ip ospf interface
Equivalent Commands
ospf hello-interval
ip ospf network
Use the ip ospf network command to configure the OSPF network type to a type different from the default for the media.
Use the no form of this command to return to the default value.
Command Syntax
ip ospf network broadcast|non-broadcast|point-to-point|point-to-multipoint
no ip ospf network
broadcast Sets the network type to broadcast.
non-broadcast Sets the network type to NBMA.
point-to-multipoint Sets the network type to point-to-multipoint.
point-to-point Sets the network type to point-to-point.
Default
Broadcast type.
Command Mode
interface mode
Usage
Use the ip ospf network command to configure Broadcast Networks as Nonbroadcast Multiaccess Networks (NBMA) and vice
versa. You would need to do this if you have routers in your network that do not support multicast addressing.
This command saves you from having to configure neighbors. Configuring NBMA networks requires a fully meshed network or a
virtual circuit connecting every router. In case the network is not fully meshed, configure the OSPF network type as a point-to-
multipoint network. Routing between two routers that are not directly connected will go through a third router that has virtual
circuits to both routers.
Examples
The following example shows setting the network to point-to-point type on the fxp0 interface.
ospfd# configure terminal
ospfd(config)# interface fxp0
ospfd(config-if)# ip ospf network point-to-point
Equivalent Commands
ospf network
ip ospf priority
Use the ip ospf priority command to set the router priority to determine the designated router for the network.
Use the no form of this command to return to the default value.
Command Syntax
ip ospf priority <1-255> (A.B.C.D)
no ip ospf priority (A.B.C.D)
A.B.C.D = IP address of the interface.
Default
The default priority is 1.
Command Mode
Interface mode
Usage
Set the priority to help determine the OSPF Designated Router (DR) for a network. If two routers attempt to become the DR, the
router with the higher router priority becomes the DR. If the router priority is the same for two routers, the router with the higher
router ID takes precedence.
Only routers with nonzero router priority values are eligible to become the designated or backup designated router.
Configure router priority for multiaccess networks only and not for point-to-point networks.
Examples
The following example shows setting the OSPF priority value to 3 on the fxp0 interface for the IP address 10.10.10.50.
ospfd# configure terminal