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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
shape (policy-map class)
Usage Guidelines The measurement interval is the committed burst size (Bc) divided by committed information rate (CIR).
Bc cannot be set to 0. If the measurement interval is too large (greater than 128 milliseconds), the system
subdivides it into smaller intervals.
If you do not specify the committed burst size (Bc) and the excess burst size (Be), the algorithm decides
the default values for the shape entity. The algorithm uses a 4 milliseconds measurement interval, so Bc
is CIR * (4 / 1000).
Burst sizes larger than the default committed burst size (Bc) need to be explicitly specified. The larger
the Bc, the longer the measurement interval. A long measurement interval may affect voice traffic
latency, if applicable.
When the excess burst size (Be) is not configured, the default value is equal to the committed burst size
(Bc).
Examples The following example configures a shape entity with a CIR of 1 Mbps and attaches the policy map
called dts-interface-all-action to interface pos1/0/0:
policy-map dts-interface-all-action
class class-interface-all
shape average 1000000
interface pos1/0/0
service-policy output dts-interface-all-action
Traffic Shaping Overhead Accounting for ATM
When a parent policy has ATM overhead accounting enabled for shaping, you are not required to enable
accounting at the child level using the police command. In the following configuration example, ATM
overhead accounting is enabled for bandwidth on the gaming and class-default class of the child policy
map named subscriber_classes and on the class-default class of the parent policy map named
subscriber_line. The voip and video classes do not have ATM overhead accounting explicitly enabled.
These priority classes have ATM overhead accounting implicitly enabled because the parent policy has
ATM overhead accounting enabled. Notice that the features in the parent and child policies use the same
encapsulation type.
policy-map subscriber_classes
12.2SX This command is supported in the Cisco IOS Release 12.2SX train.
Support in a specific 12.2SX release of this train depends on your
feature set, platform, and platform hardware.
12.2(31)SB6 This command was enhanced to specify an offset size when
calculating ATM overhead and implemented on the Cisco 10000
series router for the PRE3.
12.2(33)SRC Support for the Cisco 7600 series router was added.
12.2(33)SB Support for the Cisco 7300 series router was added.
Cisco IOS XE Release 2.1 This command was implemented on Cisco ASR 1000 series routers
12.4(20)MR This command was integrated into Cisco IOS Release 12.4(20)MR.
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
- 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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