Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 194)

166 Multi-Service IronWare Routing Configuration Guide
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OSPF VRF-Lite for customer-edge routers
Dynamic OSPF activation and configuration
OSPF is automatically activated when you enable it. The protocol does not require a software
reload.
You can configure and save the following OSPF changes without resetting the system:
• All OSPF interface-related parameters (for example: area, hello timer, router dead time cost,
priority, re-transmission time, transit delay)
• All area parameters
• All area range parameters
• All virtual-link parameters
• All global parameters
• creation and deletion of an area, interface or virtual link
• Changes to address ranges
• Changes to global values for redistribution
• Addition of new virtual links
OSPF VRF-Lite for customer-edge routers
When a type 3, 5, or 7 LSA is sent from a provider edge (PE) router to a customer edge (CE) router,
the DN (down) bit in the LSA options field must be set. This prevents any type 3, 5, or 7 LSA
messages sent from the CE router to the PE router from being distributed any farther. The PE router
ignores messages with the DN bit set and does not add these routes to the VRF routing table.
When you enable VRF-Lite on the CE router, the DN setting is ignored, allowing the CE router to add
these routes to the VRF routing table.
To enable VRF-Lite, enter commands such as the following:
Brocade(config)# router ospf vrf 1
Brocade(config-ospf-router-vrf-1)# vrf-lite-capability
Syntax: [no] vrf-lite-capability
Use the no form of the command to disable VRF-Lite. This applies to the VRF instance only. It does
not apply to the default VRF.
NOTE
For vpn4 external routes to be installed on CE routers, the domain-tags on PE routers must be
different that the domain-tags on CE routers.
NOTE
This command applies to CE routers only. This command does not apply to PE routers.