Alcatel-Lucent 6850-48 参照ガイド
OmniSwitch CLI Reference Guide
September 2009
page 41-1
41 OSPF Commands
Open Shortest Path First routing (OSPF) is a shortest path first (SPF) or link-state protocol. OSPF is an
interior gateway protocol (IGP) that distributes routing information between routers in a single autono-
mous system (AS). OSPF chooses the least-cost path as the best path.
interior gateway protocol (IGP) that distributes routing information between routers in a single autono-
mous system (AS). OSPF chooses the least-cost path as the best path.
Each participating router distributes its local state (i.e., the router’s usable interfaces and reachable neigh-
bors) throughout the AS by flooding. In a link-state protocol, each router maintains a database describing
the entire AS topology. This database is built from the collected link state advertisements of all routers.
Each multi-access network that has at least two attached routers has a designated router and a backup
designated router. The designated router floods a link state advertisement for the multi-access network and
has other special responsibilities.
bors) throughout the AS by flooding. In a link-state protocol, each router maintains a database describing
the entire AS topology. This database is built from the collected link state advertisements of all routers.
Each multi-access network that has at least two attached routers has a designated router and a backup
designated router. The designated router floods a link state advertisement for the multi-access network and
has other special responsibilities.
OSPF allows collections of contiguous networks and hosts to be grouped together. A group, together with
the routers having interfaces to any one of the included networks, is called an area. Each area runs a sepa-
rate copy of the basic link-state routing algorithm. This means that each area has its own topological data-
base, as explained in the previous section.
the routers having interfaces to any one of the included networks, is called an area. Each area runs a sepa-
rate copy of the basic link-state routing algorithm. This means that each area has its own topological data-
base, as explained in the previous section.
Alcatel-Lucent’s version of OSPF complies with RFCs 1370, 1850, 2328, 2370, 3101, and 3623.
MIB information for OSPF is as follows:
Filename:
AlcatelIND1DrcTm.mib
Module: ALCATEL-IND1-DRCTM-MIB
Filename: AlcatelIND1Ospf.mib
Module: ALCATEL-IND1-OSPF-MIB
Module: ALCATEL-IND1-OSPF-MIB
Filename: IETF_OSPF.MIB
Module: OSPF-MIB
Module: OSPF-MIB