Ospf Features; Ospf Configuration Task List - H3C S7500 Series Operation Manual

Operation Manual – Routing Protocol
H3C S7500 Series Ethernet Switches
As described in RFC 1587, Type-7 LSAs and Type-5 LSAs mainly differ in the
following two ways:
Type-7 LSAs are generated and advertised in an NSSA, where Type-5 LSAs will
not be generated or advertised.
Type-7 LSAs can only be advertised in an NSSA area. When Type-7 LSAs reach
an ABR, the ABR can convert part of the routing information carried in the Type-7
LSAs into Type-5 LSAs and advertise the Type-5 LSAs. Type-7 LSAs are not
directly advertised to other areas (including the backbone area).

4.1.7 OSPF Features

S7500 series support the following OSPF features:
Stub area: Stub area is defined to reduce the cost for the routers in the area to
receive ASE routes.
NSSA area: NSSA area is defined to remove the limit on the topology in a stub
area.
OSPF multi-process: Multiple OSPF processes can run on a router.
Sharing discovered routing information with other dynamic routing protocols: At
present, OSPF supports importing the routes of other dynamic routing protocols
(such as RIP), and static routes as OSPF external routes into the AS to which the
router belongs. In addition, OSPF supports advertising the routing information it
discovered to other routing protocols.
Authentication key: OSPF supports the authentication of the packets between
neighboring routers in the same area by using one of the two methods: plain text
authentication key and MD5 authentication key.
Flexible configuration of router interface parameters: For a router interface, you
can configure the following OSPF parameters: output cost, Hello interval,
retransmission interval, interface transmission delay, route priority, dead time for
a neighboring router, and packet authentication mode and authentication key.
Virtual link: Virtual links can be configured.

4.2 OSPF Configuration Task List

Complete the following tasks to configure OSPF:
Basic OSPF Configuration
OSPF Area Attribute Configuration
Task
4-8
Chapter 4 OSPF Configuration
Remarks
Required
Optional