Brocade Multi-Service IronWare Routing Configuration Guide Uživatelský manuál stáhnout pdf (Strana 194)

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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.

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