Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual de usuario Pagina 169
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Customizing EGP Services
308628-15.0 Rev 00
8-9
Specifying the Gateway Mode
You can configure the EGP router to operate in one of two gateway modes for any
given IP interface:
• Noncore. When the router is configured as a noncore gateway, the AS to
which it belongs acts as a stub AS. It advertises and forwards only traffic that
originated or is destined for a network within its AS.
• Core. When the router is configured as a core gateway, the AS to which it
belongs acts as a transit AS. In core mode, the router can advertise and
forward traffic to networks that are reachable inside or outside its local AS.
If you choose noncore mode, the AS to which this EGP neighbor belongs will act
as a stub AS. That is, it will advertise only networks that reside within the AS.
The default gateway mode is core mode. If the EGP router is reconfigured to run
in noncore mode, Site Manager automatically configures EGP export route filters
on that IP interface. This action suppresses OSPF external routes to EGP and the
advertisement of any networks learned by EGP.
To specify the gateway mode of this EGP neighbor, complete the following steps:
Site Manager Procedure
You do this System responds
1. In the Configuration Manager window,
choose
Protocols
.
The Protocols menu opens.
2. Choose
IP
. The IP menu opens.
3. Choose
EGP
. The EGP menu opens.
4. Choose
Neighbors
. The IP Interface List for EGP window
opens.
5. Click on the IP interface that you want to
edit.
The parameter values for that interface
appear in the window.
6. Click on
EGP Neighbor
. The EGP Neighbors List window opens.
7. Click on the address of the EGP neighbor
that you want to edit.
The parameter values for that neighbor
appear in the window.
8. Set the
Gateway Mode
parameter.
Click
on
Help
or see the parameter description
on page
A-26
.
(continued)
- Configuring IP Exterior 1
- Gateway Protocols 1
- (BGP and EGP) 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 308628-15.0 Rev 00 6
- Before You Begin 15
- Text Conventions 16
- Set Trap Monitor Filters 17
- Acronyms 18
- Related Publications 20
- How to Get Help 21
- Chapter 1 23
- Border Gateway Protocol (BGP) 25
- BGP Concepts and Terminology 26
- Peer-to-Peer Sessions 27
- Interior BGP Routing 28
- IBGP Route Reflector 29
- Equal-Cost Multipath 30
- BGP Updates 30
- Path Attributes 31
- BGP/OSPF Interaction 32
- BGP-4 Confederations 33
- BGP Implementation Notes 34
- Chapter 2 37
- Starting BGP and EGP Services 37
- Deleting EGP from the Router 43
- Chapter 3 45
- Disabling and Reenabling BGP 46
- Supplying a BGP Router ID 48
- Identifying the Local AS 49
- Enabling Multihop Connections 57
- Figure 3-1. BGP Confederation 67
- Selection 69
- Best-Route Selection 71
- Chapter 4 83
- Negotiating the BGP Version 88
- Keeping the Connection Alive 90
- Specifying a Holddown Time 93
- 2.2.2.5: 95
- Setting the Route Echo Switch 100
- Configuring BGP Peers 103
- 308628-15.0 Rev 00 104
- Using Site Manager 109
- Chapter 5 111
- Topic Page 112
- Examples 118
- Announce Policy Guidelines 123
- Chapter 6 139
- Configuring a Route Reflector 139
- Configuring an RR Client 148
- Chapter 7 151
- Chapter 8 161
- Customizing EGP Services 161
- EGP Concepts and Terminology 162
- EGP Implementation Notes 165
- Customizing EGP on the Router 166
- Configuring a Neighbor 167
- Specifying the Gateway Mode 169
- Choosing the Acquisition Mode 171
- Choosing the Poll Mode 172
- Setting Neighbor Timers 173
- Appendix A 175
- Site Manager Parameters 175
- BGP Parameters 176
- BGP Configuration Parameters 177
- BGP Global Parameters 178
- BGP-3 Global Parameter 185
- BGP-4 Global Parameter 185
- BGP Peer Parameters 185
- BGP Event Message Parameters 198
- EGP Parameters 199
- EGP Neighbor Parameters 200
- Routing Policy Parameters 203
- Appendix B 257
- Regular Expression Symbols 268
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