Enterasys csx400 安装指导
Chapter 2: About the CSX400
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CyberSWITCH CSX400 and CSX400-DC Installation Guide
Input Idle Time-out —
Input Idle Time-out allows you to determine the amount of time necessary
for data packets to be received, before the interface is automatically disconnected.
Output Idle Time-out —
Output Idle Time-out allows you to determine the amount of time
necessary for data packets to be transmitted, before the interface is automatically disconnected.
The IP-OSPF Routing Protocol
Open Shortest Path First (OSPF) is a link state routing protocol developed for Internet Protocol
(IP) networks. OSPF distributes routing information between routers belonging to a single
autonomous system. In an autonomous system, routers exchange routing information through a
common routing protocol.
(IP) networks. OSPF distributes routing information between routers belonging to a single
autonomous system. In an autonomous system, routers exchange routing information through a
common routing protocol.
OSPF was designed primarily for the Internet environment and supports variable length subnet
masks, Type of Service (TOS) based routing, packet authentication, and the tagging of externally
derived routing information.
masks, Type of Service (TOS) based routing, packet authentication, and the tagging of externally
derived routing information.
OSPF, based upon link-state technology, was developed by the Internet Engineering Task Force
(IETF). The IETF developed OSPF based upon the shortest path first algorithm to serve large,
heterogeneous networks.
(IETF). The IETF developed OSPF based upon the shortest path first algorithm to serve large,
heterogeneous networks.
A key feature of OSPF is the speed in which it responds to topological changes, commonly
referred to as “convergence time.” OSPF generates a minimal amount of routing protocol traffic
compared to most distance vector protocols.
referred to as “convergence time.” OSPF generates a minimal amount of routing protocol traffic
compared to most distance vector protocols.
Cabletron’s implementation of OSPF is based on RFC 1247 — OSPF Version 2 and RFC 1253 —
OSPF Version 2 Management Information Base.
OSPF Version 2 Management Information Base.
IP-OSPF Hierarchy
IP-OSPF operates within a hierarchy of entities:
Autonomous System
An Autonomous System (AS) is a set of routers and networks under a common administration.
Routers inside an AS are called “interior gateways” and the protocol is called Interior Gateway
Protocol (IGP). OSPF is an IGP.
Routers inside an AS are called “interior gateways” and the protocol is called Interior Gateway
Protocol (IGP). OSPF is an IGP.
An autonomous system may contain one or more networks, but each network within the
autonomous system may or may not support subnetting. Each autonomous system possesses a
16-bit decimal number assigned by the Network Information Center (NIC). Every router
belonging to an autonomous system must be configured with the same autonomous system
number.
autonomous system may or may not support subnetting. Each autonomous system possesses a
16-bit decimal number assigned by the Network Information Center (NIC). Every router
belonging to an autonomous system must be configured with the same autonomous system
number.