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Im
pl
e
m
en
ting Rout
ing Po
licy o
n Cisco
IOS XR
Softwa
re
Addi
tiona
l Ref
erences
RC
-402
Cisco
IOS XR
Routing
Configur
ation G
uide
1
2
...
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Text Part Number: OL-12285-01
1
CONTENTS
3
Contents
10
Preface
13
Release Modification
15
BGP Functional Overview
17
BGP Router Identifier
18
BGP Default Limits
18
BGP Next Hop Tracking
19
Scoped IPv4/VPNv4 Table Walk
20
BGP Configuration
21
Configuration Modes
22
Neighbor Submode
23
Configuration Templates
24
Template Inheritance Rules
25
Template Inheritance
29
No Default Address Family
33
Routing Policy Enforcement
34
Table Policy
35
Update Groups
36
BGP Cost Community
36
BGP Best Path Algorithm
41
Order of Comparisons
43
Best Path Change Suppression
43
Administrative Distance
44
Figure 3 Back Door Example
45
Multiprotocol BGP
46
Route Dampening
47
BGP Route Reflectors
48
Distributed BGP
51
BGP Keychains
53
IPv6 Provider Edge Multipath
54
IP L3VPN w/L2TPv3
55
Service Provider
56
Enabling BGP Routing
58
Logging Neighbor Changes
63
Adjusting BGP Timers
64
Configuring BGP Weights
68
5. router bgp as-number
99
DETAILED STEPS
100
Example:
101
SUMMARY STEPS
103
Configuring Distributed BGP
105
BGP Load Balancing
121
Redistribution of IGPs to BGP
123
Configuring Keychains for BGP
126
Disabling a BGP Neighbor
130
Monitoring BGP Update Groups
138
Software
139
BGP Confederation: Example
142
BGP Route Reflector: Example
143
Where to Go Next
144
Additional References
145
Technical Assistance
146
EIGRP Functional Overview
149
EIGRP Features
149
EIGRP Components
150
EIGRP Configuration Grouping
151
EIGRP Configuration Modes
151
EIGRP Interfaces
152
Mismatched K Values
153
The Goodbye Message
154
10.1.1.0/24
157
Enabling EIGRP Routing
160
Restrictions
162
/length
164
Monitoring EIGRP Routing
174
Cisco IOS XR Software
177
IS-IS Functional Overview
183
IS-IS Configuration Grouping
184
IS-IS Configuration Modes
184
IS-IS Interfaces
185
Multitopology Configuration
185
Limit LSP Flooding
186
Single-Topology IPv6 Support
187
Multitopology IPv6 Support
187
IS-IS Authentication
187
Nonstop Forwarding
188
Multi-Instance IS-IS
189
Overload Bit on Router
189
Default Routes
190
IS-IS Support for Route Tags
190
Multicast-Intact Feature
190
MPLS TE Forwarding Adjacency
192
MPLS TE Interarea Tunnels
193
IP Fast Reroute
193
Prerequisites
194
Prerequisite
211
Tuning Adjacencies for IS-IS
214
Customizing Routes for IS-IS
219
Enabling Multicast-Intact
224
OSPF Routing Components
240
Autonomous Systems
241
Stub Area
242
Not-so-Stubby Area
242
Area Border Routers
242
OSPF Process and Router ID
243
Supported OSPF Network Types
243
Plain Text Authentication
244
MD5 Authentication
244
Authentication Strategies
244
Key Rollover
244
Default Route for OSPF
245
Route Redistribution for OSPF
248
Graceful Restart for OSPFv3
250
Helper Mode
251
• draft-ietf-ospf-cap-09
255
Enabling OSPF
256
area-id
257
seconds
270
Examples
275
DETAILED STEP
290
Summary Steps
292
ABR 1 Configuration
314
ABR 2 Configuration
314
Standards
316
RIB Administrative Distance
319
RIB Support for IPv4 and IPv6
320
RIB Statistics
320
RIB Quarantining
321
How to Deploy and Monitor RIB
322
Related Documents
329
RIP Functional Overview
332
Split Horizon for RIP
333
Route Timers for RIP
333
Route Redistribution for RIP
334
Enabling RIP
336
Customize RIP
337
Control Routing Information
340
Named Set Form
355
Inline Set Form
355
Routing Policy Language Usage
359
Set community based on MED
360
Persistent Remarks
360
Policy Definitions
361
Parameterization
362
Global Parameterization
363
Boolean Operator Precedence
364
When Attributes Are Modified
365
Default Drop Disposition
365
Control Flow
366
Policy Verification
366
Attached Policy Modification
367
Policy Statements
368
Boolean Conditions
371
Attach Points
372
BGP Policy Attach Points
373
Dampening
374
Default Originate
375
Neighbor Export
375
Neighbor Import
376
Redistribute
377
Show BGP
377
Retain Route-Target
380
Allocate-Label
381
Neighbor-ORF
381
Next-hop
382
Clear-Policy
382
BGP Attributes and Operators
383
OSPF Policy Attach Points
393
Area-out
394
OSPF Attributes and Operators
394
OSPFv3 Policy Attach Points
395
IS-IS Policy Attach Points
396
Default-Information Originate
397
Inter-area-propagate
397
EIGRP Policy Attach Points
398
Default-Accept-In
399
Default-Accept-Out
399
Policy-In
399
Policy-Out
400
If-Policy-In
400
If-Policy-Out
400
RIP Policy Attach Points
401
Global-Inbound
402
Global-Outbound
402
Interface-Inbound
403
Interface-Outbound
403
RIP Attributes and Operators
403
• Nano (default)
405
Defining a Route Policy
407
policy-name
410
Directly Connected Routes
419
Recursive Static Routes
420
Floating Static Routes
421
Default VRF
421
Configuring a Static Route
422
Configuration Examples
430
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