Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 291)

On a non-broadcast interface, the routers at either end of this interface must configure non-broadcast
interface type and the neighbor IP address. There is no restriction on the number of routers sharing a
non-broadcast interface (for example, through a hub/switch).
To configure an OSPF interface as a non-broadcast interface, you enable the feature on a physical
interface or a VE, following the ip ospf area statement, and then specify the IP address of the neighbor
in the OSPF configuration. The non-broadcast interface configuration must be done on the OSPF
routers at either end of the link.
For example, the following commands configure VE 20 as a non-broadcast interface.
device(config)# int ve 20
device(config-vif-20)# ip address 10.1.20.4/24
device(config-vif-20)# ip ospf area 0
device(config-vif-20)# ip ospf network non-broadcast
The following commands specify 10.1.20.1 as an OSPF neighbor address. The address specified must
be in the same sub-net as the non-broadcast interface.
device(config)# router ospf
device(config-ospf-router)# neighbor 10.1.20.1
For example, to configure the feature in a network with three routers connected by a hub or switch,
each router must have the linking interface configured as a non-broadcast interface, and the two other
routers must be specified as neighbors.
Configuring OSPF Graceful Restart
OSPF Graceful Restart can be enabled in the following configurations:
• Configuring OSPF Graceful Restart for the Global Instance - In this configuration all OSPF
neighbors other than those used by VRFs are made subject to the Graceful Restart capability. The
restart timer set globally does not apply to Graceful Restart on a configured VRF.
• Configuring OSPF Graceful Restart per VRF - In this configuration all OSPF neighbors for the
specified VRF are made subject to the Graceful Restart capability. The restart timer set for a specific
VRF only applies to that VRF.
Configuring OSPF Graceful Restart for the global instance
OSPF Graceful restart can be configured for the global instance or for a specified Virtual Routing and
Forwarding (VRF) instance. Configuring OSPF Graceful restart for the global instance does not
configure it for any VRFs. The following sections describe how to enable the OSPF graceful restart
feature for the global instance on a device.
Use the following command to enable the graceful restart feature for the global instance on a device.
device(config)# router ospf
device(config-ospf-router)# graceful-restart
Syntax: [no] graceful-restart
Configuring OSPF Graceful Restart time for the global instance
Use the following command to specify the maximum amount of time advertised to a neighbor router to
maintain routes from and forward traffic to a restarting router.
device(config) router ospf
device(config-ospf-router)# graceful-restart restart-time 120
Configuring OSPF Graceful Restart
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