Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual de usuario Pagina 172
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Configuring IP Exterior Gateway Protocols (BGP and EGP)
10-10
308628-14.00 Rev 00
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 the core mode, it can advertise and forward
traffic to networks that are reachable inside or outside of 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, the 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.
You can use Site Manager to specify the gateway mode of this EGP neighbor.
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 you want. The parameter values for that interface
appear in the window.
6. Set the
Gateway Mode
parameter.
Click
on
Help
or see the parameter description
on page
A-25
.
7. Click on
Apply
, and then click on
Done
. Site Manager returns you to the
Configuration Manager window.
- Configuring IP Exterior 1
- Gateway Protocols (BGP and 1
- Trademarks 2
- Statement of Conditions 2
- Contents 5
- 308628-14.00 Rev 00 10
- 308628-14.00 Rev 00 11
- Before You Begin 15
- Text Conventions 16
- Set Trap Monitor Filters 17
- Acronyms 18
- Hard-Copy Technical Manuals 19
- How to Get Help 20
- Chapter 1 21
- Border Gateway Protocol (BGP) 23
- BGP Concepts and Terminology 24
- Peer-to-Peer Sessions 25
- Interior BGP Routing 26
- IBGP Route Reflector 27
- Equal-Cost Multipath 28
- BGP Updates 28
- Path Attributes 29
- BGP/OSPF Interaction 30
- BGP-4 Confederations 30
- BGP Implementation Notes 31
- Chapter 2 33
- <mask> 34
- Starting BGP 35
- Chapter 3 37
- Deleting BGP from the Router 39
- Starting EGP 40
- Deleting EGP from the Router 42
- Customizing EGP 42
- Next-hop address 0 44
- Next-hop mask 0 44
- Chapter 4 45
- The IP global prompt appears 46
- Defining a Static Route 53
- Chapter 5 59
- Enabling and Disabling BGP 60
- Supplying a BGP Identifier 62
- Identifying the Local AS 63
- Enabling Multihop Connections 69
- Configuring BGP as a Soloist 72
- Best-Route Selection 86
- <name> 91
- Chapter 6 95
- Negotiating the BGP Version 100
- Keeping the Connection Alive 101
- Using the BCC 102
- Using Site Manager 102
- Specifying a Holddown Time 104
- Setting the Route Echo Switch 110
- Chapter 7 117
- Defining a BGP Accept Policy 118
- Using Site Manage 126
- (continued) 129
- (continued) 131
- Chapter 8 141
- Configuring a Route Reflector 141
- Configuring an RR Client 149
- 2.2.2.3): 150
- Chapter 9 153
- Chapter 10 163
- Customizing EGP Services 163
- EGP Concepts and Terminology 164
- EGP Implementation Notes 167
- Customizing EGP on the Router 168
- Supplying a Local AS Number 169
- Configuring a Neighbor 170
- Specifying the Gateway Mode 172
- Choosing the Acquisition Mode 174
- Choosing the Poll Mode 175
- Setting Neighbor Timers 176
- Appendix A 177
- Site Manager Parameters 177
- BGP Configuration Parameters 178
- BGP Global Parameters 178
- BGP-3 Global Parameter 186
- BGP-4 Global Parameter 186
- BGP Peer Parameters 186
- BGP Event Message Parameters 198
- EGP Parameters 200
- EGP Neighbor Parameters 201
- IP Parameters 204
- IP Interface Parameters 206
- IP Global Parameters 220
- Static Route Parameters 227
- Adjacent Host Parameters 230
- Appendix B 235
- Routing Policies 235
- Appendix C 289
- Commands 296
- Regular Expression Symbols 300
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