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Implementing BGP on Cisco IOS XR Software
How to Implement BGP on Cisco IOS XR Software
RC-71
Cisco IOS XR Routing Configuration Guide
Resetting Neighbors Using BGP Dynamic Inbound Soft Reset
Perform this task to trigger an inbound soft reset of the specified address families for the specified group or
neighbors.
Resetting neighbors is useful if you change the inbound policy for the neighbors or any other
configuration that affects the sending or receiving of routing updates. If an inbound soft reset is
triggered, BGP sends a REFRESH request to the neighbor if the neighbor has advertised the
ROUTE_REFRESH capability. To determine whether the neighbor has advertised the
ROUTE_REFRESH capability, use the show /jointfilesconvert/86220/bgp neighbors command.
SUMMARY STEPS
1. show /jointfilesconvert/86220/bgp neighbors
2. clear /jointfilesconvert/86220/bgp {ipv4 | ipv6 | all} {unicast | multicast | all} {* | ip-address | as-number | external} soft in
DETAILED STEPS
Resetting Neighbors Using BGP Outbound Soft Reset
Perform this task to trigger an outbound soft reset of the specified address families for the specified group
or neighbors.
Resetting neighbors is useful if you change the outbound policy for the neighbors or any other
configuration that affects the sending or receiving of routing updates.
If an outbound soft reset is triggered, BGP resends all routes for the address family to the given
neighbors.
To determine whether the neighbor has advertised the ROUTE_REFRESH capability, use the show /jointfilesconvert/86220/bgp
neighbors command.
Command or Action Purpose
Step 1
show /jointfilesconvert/86220/bgp neighbors
Example:
RP/0/RP0/CPU0:router# show /jointfilesconvert/86220/bgp neighbors
Verifies that received route refresh capability from the
neighbor is enabled.
Step 2
clear /jointfilesconvert/86220/bgp {ipv4 | ipv6 | all} {unicast |
multicast | all} {* |
ip-address
|
as-number
|
external} soft in
Example:
RP/0/RP0/CPU0:router# clear /jointfilesconvert/86220/bgp ipv4 unicast
10.0.0.1 soft in
Soft resets a BGP neighbor.
• The * keyword resets all BGP neighbors.
• The ip-address argument specifies the address of the
neighbor to be reset.
• The as-number argument specifies that all neighbors
that match the autonomous system number be reset.
• The external keyword specifies that all external
neighbors are reset.
- 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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