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Implementing BGP on Cisco IOS XR Software
Information About Implementing BGP on Cisco IOS XR Software
RC-10
Cisco IOS XR Routing Configuration Guide
RP/0/RP0/CPU0:router# show /jointfilesconvert/86220/bgp neighbors 192.168.2.2
BGP neighbor is 192.168.2.2, remote AS 1, local AS 140, external link
Remote router ID 0.0.0.0
BGP state = Idle
Last read 00:00:00, hold time is 180, keepalive interval is 60 seconds
Received 0 messages, 0 notifications, 0 in queue
Sent 0 messages, 0 notifications, 0 in queue
Minimum time between advertisement runs is 15 seconds
For Address Family: IPv4 Unicast
BGP neighbor version 0
Update group: 0.1
eBGP neighbor with no inbound or outbound policy; defaults to 'drop'
Route refresh request: received 0, sent 0
0 accepted prefixes
Prefix advertised 0, suppressed 0, withdrawn 0, maximum limit 524288
Threshold for warning message 75%
Connections established 0; dropped 0
Last reset 00:02:03, due to BGP neighbor initialized
External BGP neighbor not directly connected.
4. Otherwise, the default value is used. In the example that follows, neighbor 10.0.101.5 has the
minimum time between advertisement runs set to 30 seconds (default) because the neighbor is not
configured to use the neighbor configuration or the neighbor group configuration:
RP/0/RP0/CPU0:router(config)# router /jointfilesconvert/86220/bgp 140
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp)# neighbor-group AS_1
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbrgrp)# remote-as 1
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbrgrp)# exit
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbrgrp)# neighbor-group adv_15
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbrgrp)# remote-as 10
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbrgrp)# advertisement-interval 15
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbrgrp)# exit
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp)# neighbor 10.0.101.5
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbr)# use neighbor-group AS_1
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbr)# exit
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp)# neighbor 10.0.101.10
RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbr)# use neighbor-group adv_15
The following output from the show /jointfilesconvert/86220/bgp neighbors command shows that the advertisement interval
used is 30 seconds:
RP/0/RP0/CPU0:router# show /jointfilesconvert/86220/bgp neighbors 10.0.101.5
BGP neighbor is 10.0.101.5, remote AS 1, local AS 140, external link
Remote router ID 0.0.0.0
BGP state = Idle
Last read 00:00:00, hold time is 180, keepalive interval is 60 seconds
Received 0 messages, 0 notifications, 0 in queue
Sent 0 messages, 0 notifications, 0 in queue
Minimum time between advertisement runs is 30 seconds
For Address Family: IPv4 Unicast
BGP neighbor version 0
Update group: 0.2
eBGP neighbor with no inbound or outbound policy; defaults to 'drop'
Route refresh request: received 0, sent 0
0 accepted prefixes
Prefix advertised 0, suppressed 0, withdrawn 0, maximum limit 524288
Threshold for warning message 75%
Connections established 0; dropped 0
- Text Part Number: OL-5554-05 1
- CONTENTS 3
- Contents 10
- Preface 11
- Obtaining Documentation 12
- Documentation Feedback 13
- Submitting a Service Request 15
- BGP Functional Overview 18
- BGP Router Identifier 19
- BGP Default Limits 19
- BGP Configuration 20
- Neighbor Submode 21
- Configuration Templates 22
- Template Inheritance Rules 23
- Template Inheritance 27
- No Default Address Family 31
- Routing Policy Enforcement 32
- Update Groups 34
- BGP Best Path Algorithm 34
- Comparing Pairs of Paths 35
- Order of Comparisons 36
- Multiprotocol BGP 37
- Route Dampening 39
- BGP Route Reflectors 40
- Enabling BGP Routing 44
- Logging Neighbor Changes 50
- Adjusting BGP Timers 50
- Configuring BGP Weights 54
- Configuring a BGP Neighbor 74
- Disabling a BGP Neighbor 85
- Monitoring BGP Update Groups 91
- BGP Confederation: Example 94
- IS-IS Functional Overview 101
- IS-IS Configuration Grouping 101
- IS-IS Interfaces 102
- Multitopology Configuration 102
- Limit LSP Flooding 102
- Single-Topology IPv6 Support 103
- Nonstop Forwarding 104
- Multitopology IPv6 Support 104
- Multi-Instance IS-IS 105
- Overload Bit on Router 105
- Default Routes 106
- Multicast-Intact Feature 106
- Prerequisites 107
- DETAILED STEPS 108
- Restrictions 109
- SUMMARY STEPS 110
- Example: 113
- Example:: 117
- Prerequisite 126
- Summary Steps 134
- Customizing Routes for IS-IS 135
- Software 138
- Where to Go Next 140
- Additional References 140
- Technical Assistance 141
- OSPF Functional Overview 145
- OSPF Routing Components 148
- Backbone Area 149
- Stub Area 149
- Not-so-Stubby Area (NSSA) 149
- OSPF Process and Router ID 150
- Supported OSPF Network Types 151
- Authentication Strategies 152
- Key Rollover 152
- Default Route for OSPF 153
- Route Redistribution for OSPF 155
- Graceful Restart for OSPFv3 157
- Restart Mode 158
- Enabling OSPF 161
- Examples 180
- address mask 185
- Enabling Graceful Restart 198
- ABR 1 Configuration 207
- ABR 2 Configuration 207
- Cisco IOS XR Software 211
- Overview of RIB 212
- RIB Administrative Distance 213
- RIB Support for IPv4 and IPv6 213
- How to Deploy and Monitor RIB 214
- Routing Policy Language 222
- Named Set Form 224
- Inline Set Form 224
- Named Form 225
- Inline Form 226
- Routing Policy Language Usage 227
- Set community based on MED 228
- Policy Definitions 229
- Parameterization 230
- Boolean Operator Precedence 231
- When Attributes Are Modified 232
- Default Drop Disposition 233
- Control Flow 233
- Policy Verification 234
- Policy Statements 235
- Disposition 236
- Boolean Conditions 238
- Attach Points 239
- BGP Policy Attach Points 240
- Dampening 241
- Default Originate 241
- Neighbor Export 242
- Neighbor Import 242
- Redistribute 243
- Show bgp 244
- Table Policy 245
- BGP Attributes and Operators 245
- OSPF Policy Attach Points 247
- OSPFv3 Policy Attach Points 248
- IS-IS Policy Attach Points 250
- Attached Policy Modification 251
- Defining a Route Policy 253
- policy-name 256
- Directly Connected Routes 265
- Recursive Static Routes 265
- Floating Static Routes 266
- Configuring a Static Route 266
- Configuration Examples 271
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