CoreWatch User’s Manual
269
Chapter 15
Configuring BGP
on the SSR
BGP Overview
The Border Gateway Protocol (BGP) is an exterior gateway protocol that allows IP routers
to exchange network connectivity information. BGP became an internet standard in 1989
(RFC 1105) and the current version, BGP-4, was published in 1994 (RFC 1771). BGP is
typically run between Internet Service Providers. It is also frequently used by multi-
homed ISP customers, as well as large commercial networks.
Autonomous systems that wish to connect their networks together must agree on a
method of exchanging routing information. Interior gateway protocols such as RIP and
OSPF may be inadequate for this task since they are not designed to handle multi-AS and
security issues. Similarly, using static routes may not be the best choice for exchanging
AS-AS routing information because there may be a large number of routes, or the routes
may change often.
Note:
An
Autonomous System
(AS) is defined as a set of routers under a central technical
administration that has a coherent interior routing plan and accurately portrays to
other ASs what routing destinations are reachable by way of it.
In an environment where security is a concern and where using static routes is not
feasible, BGP is often the best choice for an AS-AS routing protocol. BGP prevents the
introduction of routing loops created by multi-homed and meshed AS topologies. BGP
also provides the ability to create and enforce policies at the AS level, such as selectively
determining which AS routes are to be accepted or what routes are to be advertised to
BGP peers.
Содержание SSR-GLX19-02
Страница 1: ...CoreWatch User s Manual 9032564 04...
Страница 2: ...Notice 2 CoreWatch User s Manual...
Страница 20: ...Preface 20 CoreWatch User s Manual...
Страница 64: ...Chapter 5 Changing System Settings 64 CoreWatch User s Manual...
Страница 86: ...Chapter 6 Configuring SSR Bridging 86 CoreWatch User s Manual...
Страница 106: ...Chapter 7 Configuring VLANs on the SSR 106 CoreWatch User s Manual...
Страница 206: ...Chapter 12 Configuring QoS on the SSR 206 CoreWatch User s Manual...
Страница 246: ...Chapter 13 Configuring Security on the SSR 246 CoreWatch User s Manual...
Страница 274: ...Chapter 15 Configuring BGP on the SSR 274 CoreWatch User s Manual Figure 184 BGP Peer Group Definition panel Options tab...
Страница 363: ...CoreWatch User s Manual 363 Chapter 16 Configuring Routing Policies on the SSR 9 Click OK...
Страница 364: ...Chapter 16 Configuring Routing Policies on the SSR 364 CoreWatch User s Manual...
Страница 370: ...Chapter 17 Checking System Status 370 CoreWatch User s Manual...
Страница 390: ...Chapter 18 Monitoring Real Time Performance 390 CoreWatch User s Manual...
Страница 396: ...Chapter 19 Checking the Status of Bridge Tables 396 CoreWatch User s Manual...
Страница 430: ...Chapter 20 Checking the Status of Routing Tables 430 CoreWatch User s Manual...
Страница 442: ...Chapter 22 Obtaining Reports 442 CoreWatch User s Manual...
Страница 456: ...Appendix B CoreWatch Menus 456 CoreWatch User s Manual...