11.1.2 OSPF functions

The table below lists the functionality provided by OSPF. The Switch allows the division of an AS into up to four OSPF networks, and can exchange, calculate, and generate routing information for OSPF networks individually. This functionality is called OSPF multi-backbone. Each independent OSPF network is called an OSPF domain.

OSPF must be configured for each OSPF domain.

When OSPF is used with VRF, each VRF can be partitioned into a maximum of four domains.

Table 11-1 OSPF functions

Functionality	OSPF
Forwarding addresses for external AS routes	OK
NSSA	OK
Per	OK
Non-broadcast (NBMA) networks	OK
Equal-cost multipath	OK
Virtual links	OK
Multi-backbone	OK
Graceful restart	OK
Stub router	OK