Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manuale Utente Pagina 84
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Configuring IP Exterior Gateway Protocols (BGP and EGP)
5-26
308628-14.00 Rev 00
Using Site Manager
Disabling BayRS Local Preference Calculation and Route Selection
A BGP speaker calculates a local preference value for each route that it receives
from an external peer and passes this value as the local_pref attribute in routing
updates that it announces to its internal BGP (IBGP) peers. A BGP speaker that
receives a routing update from an IBGP peer uses the local_pref attribute in its
best-route selection process.
By default, BGP calculates a local-preference value by using the algorithm
described in “
Calculating BGP-4 Local Preference Values” on page 5-27. The
best-route selection process is described in “
Best-Route Selection” on page 5-28.
Different implementations of BGP have different ways of arriving at a local
preference value. However, within an AS, all BGP speakers should use the same
method to determine local preference and to select the best routes.
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
BGP
. The BGP menu opens.
4. Choose
BGP Peers
. The Edit BGP Global Parameters window
opens.
5. Set the following parameters:
• Tcp Authentication
• Tcp Md5 Key Storage
• Tcp Md5 Key
Click on
Help
or see the parameter
descriptions beginning on page A-17
.
6. Click on
OK
. Site Manager returns you to the
Configuration Manager window.
Note:
For a comparison of
the Nortel Networks BCC and Site Manager
equivalents for Cisco router configuration commands, see Appendix C,
“Translating Cisco to Nortel Networks Equivalents.”
- 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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