Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Instrukcja Użytkownika Strona 91
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Configuring BGP Peers
308628-15.0 Rev 00
4-9
Setting the External Advertisement Timer
After a connection is established, the BGP speaker uses one or more update
messages to send the entire IP routing table (compliant with local BGP announce
policies). BGP, however, does not require the entire routing table to be sent again.
Therefore, the BGP speaker must keep a current version of the routing
information received from all its peers for as long as the connection to each peer is
valid. This information is updated by means of update messages whenever
changes occur.
By default, BGP examines the routing table for changes every 30 seconds. If a
change has occurred, BGP issues an update message on the connection.
You can use the BCC or Site Manager to specify a value for the external
advertisement timer.
Using the BCC
To specify a value for the external advertisement timer, go to a BGP peer prompt
(for example,
box; ip; /jointfilesconvert/97454/bgp; peer/2.2.2.2/2.2.2.3
) and enter:
advertise-time
<
seconds>
seconds
is an integer (from 1 through 2,147,483,647) specifying the minimum
interval at which BGP examines the routing table for changes before issuing an
update message on this peer session.
5. Click on the IP interface for which you
want to edit BGP peer parameters.
6. Click on
BGP Peers
. The BGP Peer List window opens.
7. Click on the peer for which you want to
edit parameters.
The parameters for that peer appear in
the window.
8. Set the
KeepAlive Timer
parameter. Click
on
Help
or see the parameter description
on page A-15
.
9. Click on
Apply
, and then click on
Done
. You return to the IP Interface List for BGP
window.
Site Manager Procedure
(continued)
You do this System responds
- 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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