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Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5 Command Reference, Cisco IOS Release 15.1(3)MR
OL-26895-01
Chapter Cisco MWR 2941 Router Command Reference, Release 15.1(3)MR
router /jointfilesconvert/475093/bgp
Usage Guidelines This command allows you to set up a distributed routing core that automatically guarantees the loop-free
exchange of routing information between autonomous systems.
Prior to January 2009, BGP autonomous system numbers that were allocated to companies were 2-octet
numbers in the range from 1 to 65535 as described in RFC 4271, A Border Gateway Protocol 4 (BGP-4).
Due to increased demand for autonomous system numbers, the Internet Assigned Number Authority
(IANA) will start in January 2009 to allocate four-octet autonomous system numbers in the range from
65536 to 4294967295. RFC 5396, Textual Representation of Autonomous System (AS) Numbers,
documents three methods of representing autonomous system numbers. Cisco has implemented the
following two methods:
• Asplain—Decimal value notation where both 2-byte and 4-byte autonomous system numbers are
represented by their decimal value. For example, 65526 is a 2-byte autonomous system number and
234567 is a 4-byte autonomous system number.
• Asdot—Autonomous system dot notation where 2-byte autonomous system numbers are
represented by their decimal value and 4-byte autonomous system numbers are represented by a dot
notation. For example, 65526 is a 2-byte autonomous system number and 1.169031 is a 4-byte
autonomous system number (this is dot notation for the 234567 decimal number).
For details about the third method of representing autonomous system numbers, see RFC 5396.
Asdot Only Autonomous System Number Formatting
In Cisco IOS Release 12.0(32)S12, 12.4(24)T, Cisco IOS XE Release 2.3, and later releases, the 4-octet
(4-byte) autonomous system numbers are entered and displayed only in asdot notation, for example, 1.10
or 45000.64000. When using regular expressions to match 4-byte autonomous system numbers the asdot
format includes a period which is a special character in regular expressions. A backslash must be entered
before the period for example, 1\.14, to ensure the regular expression match does not fail. Table 1-7
shows the format in which 2-byte and 4-byte autonomous system numbers are configured, matched in
regular expressions, and displayed in show command output in Cisco IOS images where only asdot
formatting is available.
Asplain as Default Autonomous System Number Formatting
In Cisco IOS Release 12.0(32)SY8, 12.2(33)SXI1, 12.0(33)S3, Cisco IOS XE Release 2.4, and later
releases, the Cisco implementation of 4-byte autonomous system numbers uses asplain as the default
display format for autonomous system numbers, but you can configure 4-byte autonomous system
numbers in both the asplain and asdot format. In addition, the default format for matching 4-byte
autonomous system numbers in regular expressions is asplain, so you must ensure that any regular
expressions to match 4-byte autonomous system numbers are written in the asplain format. If you want
to change the default show command output to display 4-byte autonomous system numbers in the asdot
12.2(33)MRA This command was integrated into Cisco IOS Release 12.2(33)MRA.
15.0(1)MR This command was integrated into Cisco IOS Release 15.0(1)MR.
Release Modification
Table 1-7 Asdot Only 4-Byte Autonomous System Number Format
Format Configuration Format
Show Command Output and Regular Expression
Match Format
asdot 2-byte: 1 to 65535
4-byte: 1.0 to 65535.65535
2-byte: 1 to 65535
4-byte: 1.0 to 65535.65535
- Release 15.1(3)MR 1
- Configuring a Policy Map 14
- Restrictions 15
- Policy Map Configuration Mode 27
- Class Characteristics 27
- Predefined Default Class 27
- Tail Drop or WRED 27
- Fragments 28
- If ID Choice Is Anything Else 72
- Unique Device Identifier 73
- Cisco HWIC-4SHDSL 88
- SNAP Encapsulation Example 96
- OL-26895-01 105
- • n393—1 to 10. Default is 4 133
- • proxy-register 187
- • list access-list 187
- • route-map map-name 187
- Support for Serial Lines 194
- Syntax Description 195
- Keepalive Time Interval 203
- Line Failure 203
- Dropped Packets 203
- DSCP Values 226
- Match Packets on DSCP Values 227
- • match access-group 231
- • match input-interface 231
- • match mpls experimental 231
- • match protocol 231
- Precedence Values and Names 233
- IPv4-Specific Traffic Match 233
- IPv6-Specific Traffic Match 234
- Support Restrictions 237
- ATM Mode Example 247
- CAS Mode Example 247
- Router(config)# no mpls ip 250
- Release 12.2(33)SRB 259
- • QL-PRC 275
- • QL-SSU-A 275
- • QL-SSU-B 275
- • QL-SEC 275
- • QL-DNU 275
- All Supported Platforms 303
- Hierarchical Policy Maps 304
- How Bandwidth Is Calculated 305
- • conform-action is transmit 311
- • exceed-action is drop 311
- • violate-action is drop 311
- Token Buckets 314
- Updating Token Buckets 315
- Marking Traffic 315
- Two-Rate Policing 316
- Syntax for Percent 318
- Command Application 332
- • Data encapsulation type 334
- • Control protocol 334
- • 4—1 packet every 16 seconds 336
- • 3—1 packet every 8 seconds 336
- • 2—1 packet every 4 seconds 336
- • 1—1 packet every 2 seconds 336
- • 0—1 packet every second 336
- Command Description 341
- Router(config)# exit 358
- Weighted Fair Queueing 366
- • Control network loops 376
- • Handle link failures 376
- • Improve convergence time 376
- the following adapters: the 409
- to specify the “from-field” 412
- • EF (expedited forwarding) 420
- Precedence Value and Queueing 421
- 2. ip tos reflect 429
- 3. ip tos tos-value 429
- Command Compatibility 440
- Bit Settings 440
- Precedence Value 441
- Committed Information Rate 449
- IMA Group 456
- M-PAIR Group 456
- 1-PAIR and 2-PAIR Group 456
- DSL Group with 1 Pair 458
- DSL Group with 2 Pairs 458
- DSL Group with 3 Pairs 458
- DSL Group with 4 Pairs 458
- • Interface name and number 471
- • Identifier (group ID) 475
- ADSL: Example 490
- • Domain name 495
- • Domain index 495
- • Domain level 495
- Field Description 504
- Reliability Errors 524
- Protocol Errors 524
- UNI Id Identifier of the UNI 526
- EVC Id Identifier of the EVC 526
- • Local and remote OAM mode 528
- • Remote platform identity 528
- • Remote loopback events 531
- Traffic Policing: Example 583
- Tunnel Marking: Example 588
- ATM Shared Port Adapter 590
- (continued) 595
- Policing 597
- Policing and Shaping 599
- Traffic Shaping: Example 600
- UDP encapsulation 613
- • priority is 128 647
- Router(config-if)# 648
- • Up to 2 queues 670
- • Up to 2 interfaces 670
- • 1 queue and 1 interface 670
- Router(config-if)# switchport 672
- GRE Tunneling Example 693
- Peak Value 705
- Average Value 705
- Burst Value 705
- Activating the Primary Member 709
- Activating the Backup Member: 709
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