Cisco MWR 2941 Installation Manual Page 447
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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
peak rate = CIR(1 + Be / Bc)
where:
• Be is the Excess Burst size.
• Bc is the Committed Burst size.
Peak rate shaping allows the router to burst higher than average rate shaping. However, using peak rate
shaping, the traffic sent above the CIR (the delta) could be dropped if the network becomes congested.
If your network has additional bandwidth available (over the provisioned CIR) and the application or
class can tolerate occasional packet loss, that extra bandwidth can be exploited through the use of peak
rate shaping. However, there may be occasional packet drops when network congestion occurs. If the
traffic being sent to the network must strictly conform to the configured network provisioned CIR, then
you should use average traffic shaping.
Examples The following example sets the uses average rate shaping to ensure a bandwidth of 256 kbps:
shape average 256000
The following example uses peak rate shaping to ensure a bandwidth of 300 kbps but allow throughput
up to 512 kbps if enough bandwidth is available on the interface:
bandwidth 300
shape peak 512000
Related Commands Command Description
bandwidth Specifies or modifies the bandwidth allocated for a class belonging to a
policy map.
class (policy-map) Specifies the name of the class whose policy you want to create or change,
and the default class (commonly known as the class-default class) before
you configure its policy.
policy-map Creates or modifies a policy map that can be attached to one or more
interfaces to specify a service policy.
service-policy Attaches a policy map to an input interface or VC, or an output interface or
VC, to be used as the service policy for that interface or VC.
shape max-buffers Specifies the maximum number of buffers allowed on shaping queues.
- 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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