Cisco IOS Asynchronous Transfer Mode Configuration Guide, Release 12.4T - AAL1 CES on AIM-ATM [Cisco IOS Software Releases 12.4 T]

Table Of Contents

AAL1 CES on AIM-ATM

Contents

Prerequisites for AAL1 CES on AIM-ATM

Restrictions for the AAL1 CES on AIM-ATM Feature

Information About AAL1 CES on AIM-ATM

CES

How to Configure AAL1 CES on AIM-ATM

Configuring AAL1 CES on AIM-ATM

Configuring IMA Groups

Configuration Examples for AAL1 CES on AIM-ATM

Configuring AAL1 CES on AIM-ATM: Example

Verifying the AAL1 CES on AIM-ATM Feature : Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Command Reference

Feature Information for AAL1 CES on AIM-ATM

AAL1 CES on AIM-ATM

First Published: May 27, 2004

Last Updated: September 12, 2008

The AAL1 CES on AIM-ATM feature adds circuit emulation service (CES) over ATM AAL1 to Cisco 3660 and Cisco 3745 routers.

Finding Feature Information in This Module

Your Cisco IOS software release may not support all of the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To reach links to specific feature documentation in this module and to see a list of the releases in which each feature is supported, use the "Feature Information for AAL1 CES on AIM-ATM" section.

Finding Support Information for Platforms and Cisco IOS and Catalyst OS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Contents

•Prerequisites for AAL1 CES on AIM-ATM

•Restrictions for the AAL1 CES on AIM-ATM Feature

•Information About AAL1 CES on AIM-ATM

•How to Configure AAL1 CES on AIM-ATM

•Configuration Examples for AAL1 CES on AIM-ATM

•Additional References Additional References

•Command Reference

•Feature Information for AAL1 CES on AIM-ATM

Prerequisites for AAL1 CES on AIM-ATM

The AAL1 CES on AIM-ATM feature requires a Cisco 3660 or Cisco 3745 with an AIM-ATM or AIM-ATM-VOICE-30 installed.

Restrictions for the AAL1 CES on AIM-ATM Feature

•AIM-ATM and AIM-ATM-VOICE-30 network modules support a maximum of four T1/E1s. This can consist of two incoming and two outgoing, or three incoming and one outgoing T1/E1s. An IMA group cannot be split between multiple AIMs.

•You cannot install two AIM-ATM modules in a cellular site router. If two AIMs are needed, install one AIM-ATM and one AIM-ATM-VOICE-30.

•This feature supports only synchronous clocking. SRTS and adaptive clocking are not supported.

•This feature supports only structured CES without CAS.

•ATM subinterfaces do not support AAL1 CES.

Information About AAL1 CES on AIM-ATM

The AAL1 CES on AIM-ATM feature, along with the ATM Cell Switching and Lossless Compression R1 feature, enables wireless service providers to optimize the bandwidth used to backhaul the traffic from a cell site to the mobile central office for more efficient use of existing T1 and E1 lines.

CES

CES is a technique specified by the ATM Forum for carrying constant bit-rate traffic over an ATM network. CES is a cell-based technology where voice traffic is adapted for an ATM network using AAL1, and the circuit is emulated across an ATM network.

How to Configure AAL1 CES on AIM-ATM

The sample configuration in this section is based on Figure 1.

Figure 1 AAL1 CES on AIM-ATM Sample Configuration

Configuring AAL1 CES on AIM-ATM

To configure AAL1 CES on AIM-ATM, perform the steps in this section.

SUMMARY STEPS

1. enable

2. configure terminal

3. network-clock-participate slot number

4. network-clock-participate slot number

5. network-clock-participate aim number

6. controller t1 | e1 slot/port

7. mode atm aim aim-slot

8. controller t1 | e1 slot/port

9. tdm-group tdm-group-no timeslots timeslot-list

10. tdm-group tdm-group-no timeslots timeslot-list

11. interface atm interface-number/subinterface-number

12. pvc vpi/vci [ces]

13. ces-cdv time

14. exit

15. pvc vpi/vci ces

16. ces-cdv time

17. exit

18. exit

19. connect connection-name atm slot/port [name of PVC/SVC|vpi/vci] E1 slot/port TDM-group-number

20. connect connection-name atm slot/port [name of PVC/SVC|vpi/vci] E1 slot/port TDM-group-number

DETAILED STEPS
Command or Action

Purpose

Step 1

enable
Example:

Router> enable

Enables privileged EXEC mode. Enter your password when prompted.

Step 2

configure terminal
Example:

Router# configure terminal

Enters global configuration mode.

Step 3

network-clock-participate slot number
Example:

Router(config)# network-clock-participate slot 1

Enables the network module in the specified slot to use the network clock for its timing.

Step 4

network-clock-participate slot number
Example:

Router(config)# network-clock-participate slot 2

Enables the network module in the specified slot to use the network clock for its timing.

Step 5

network-clock-participate aim number
Example:

Router(config)# network-clock-participate aim 0

Specifies that the AIM in Slot 0 will derive clocking from the network source.
Step 6
controller t1 | e1 slot/port
Example:

Router(config)# controller e1 1/0
Enters controller configuration mode for the selected T1 or E1.
Step 7
mode atm aim aim-slot 
Example::
Router(config-controller)# mode atm aim 1
Sets the mode of the T1 or E1 controller in AIM Slot 1.
Step 8
controller t1 | e1 slot/port
Example:

Router(config)# controller e1 2/0
Enters controller configuration mode for the selected T1 or E1.
Step 9
tdm-group tdm-group-no timeslots timeslot-list 
Example:
Router(config-controller)# tdm-group 1 
timeslots 1
Configure a TDM channel group for the T1 or E1 interface.

tdm-group-no is a value from 0 to 23 for T1 and from 0 to 30 for E1; it identifies the group.

timeslot-list is a single number, numbers separated by commas, or a pair of numbers separated by a hyphen to indicate a range of timeslots. The valid range is from 1 to 24 for T1. For E1, the range is from 1 to 31.
Step 10
tdm-group tdm-group-no timeslots timeslot-list 
Example:
Router(config-controller)# tdm-group 2 
timeslots 17-31
Configure a TDM channel group for the T1 or E1 interface.
Step 11
interface atm 
interface-number/subinterface-number
Example:
Router(config) # interface atm 1/0
Enters configuration mode for the selected ATM interface.
Step 12
pvc vpi/vci [ces]
Example:
Router(config-if)# pvc 4/44 ces
Creates a PVC for the virtual path identifier (VPI) and virtual channel identifier (VCI) and specifies CES encapsulation. Enters interface-ATM-VC configuration mode.
Step 13
ces-cdv time
Example:
Router(config-if-ces-vc)# ces-cdv 500
Configures the cell delay variation (CDV). The configuration command has the format ces-cdv <time> where the time is the maximum tolerable cell arrival jitter with a range of 1 to 65535 microseconds.
Step 14
exit
Example:
Router(config-if-ces-vc)# exit
Exits back to interface configuration mode.
Step 15
pvc vpi/vci ces
Example:
Router(config-if)# pvc 8/88 ces
Creates a second PVC and enters interface-ATM-VC configuration mode.
Step 16
ces-cdv time
Example:
Router(config-if-ces-vc)# ces-cdv 1000
Configures the CDV for 1000 microseconds.
Step 17
exit
Example:
Router(config-if-ces-vc)# exit
Exits back to interface configuration mode.
Step 18
exit
Example:
Router(config-if)# exit
Exits back to configuration mode.
Step 19
connect connection-name atm slot/port [name of 
PVC/SVC | vpi/vci] T1 slot/port 
TDM-group-number
Example:
Router(config)# connect alpha ATM 1/0 4/44 E1 
2/0 1
Defines connections between T1 or E1 controller ports and the ATM interface.
Step 20
connect connection-name atm slot/port [name of 
PVC/SVC | vpi/vci] T1 slot/port 
TDM-group-number
Example:
Router(config)# connect alpha ATM 1/0 8/88 E1 
2/0 2
Defines connections between T1 or E1 controller ports and the ATM interface.
Configuring IMA Groups

To configure IMA groups, perform the steps in this section.

SUMMARY STEPS

1. enable

2. configure terminal

3. network-clock-participate slot number

4. network-clock-participate aim number

5. controller t1 | e1 slot/port

6. mode atm aim aim-slot

7. interface atm interface-number/subinterface-number

8. ima-group group-number

9. exit

10. Repeat Step 7 through Step 9.

11. interface atm slot/imagroup-number

12. pvc vpi/vci [ces]

13. partial-fill octet

14. exit

15. pvc vpi/vci [ces]

16. ces-cdv time

17. exit

18. exit

19. connect connection-name atm slot/port [name of PVC/SVC|vpi/vci] E1 slot/port TDM-group-number

DETAILED STEPS
Command or Action

Purpose

Step 1

enable
Example:

Router> enable

Enables privileged EXEC mode. Enter your password when prompted.

Step 2

configure terminal
Example:

Router# configure terminal

Enters global configuration mode.

Step 3

network-clock-participate slot number
Example:

Router(config)# network-clock-participate slot 2

Enables the network module in the specified slot to use the network clock for its timing.

Step 4

network-clock-participate aim number
Example:

Router(config)# network-clock-participate aim 0

Specifies that the AIM in Slot 0 will derive clocking from the network source.
Step 5
controller t1 | e1 slot/port
Example:

Router(config)# controller e1 1/0
Enters controller configuration mode for the selected T1 or E1.
Step 6
mode atm aim aim-slot 
Example::
Router(config-controller)# mode atm aim 1
Sets the mode of the T1 or E1 controller in AIM Slot 1.
Step 7
interface atm 
interface-number/subinterface-number
Example:
Router(config)# interface atm 2/1
Enters configuration mode for the selected ATM interface.
Step 8
ima-group group-number
Example:
Router(config-if)# ima-group 0
Specifies that the link is included in an IMA group. Enter an IMA group number from 0 to 3.
Step 9
exit
Example:

Router(config-if)# exit
Exits interface configuration mode.
Step 10

Repeat Step 7 through Step 9 to add ATM 2/3 to IMA group 0.
Step 11
interface atm slot/imagroup-number
Example:
Router(config)# interface atm 0/ima0
Enter interface configuration mode for the IMA group.
Step 12
pvc vpi/vci [ces]
Example:
Router(config-if)# pvc 5/55 ces 
Creates a PVC for the virtual path identifier (VPI) and virtual channel identifier (VCI) and specifies CES encapsulation. Enters interface-ATM-VC configuration mode.
Step 13
partial-fill octet
Example:
Router(config-if-ces-vc)# partial-fill 35
Configures the number of AAL1 user octets per cell for CES. The range of values is 1-46 for T1 and 20-47 for E1.

Note Partial fill and CDV cannot be modified under a CES PVC that is part of any connection. Do not establish the connection until after you enter the partial-fill and CDV values.
Step 14
exit
Example:
Router(config-if-ces-vc)# exit
Exits back to interface configuration mode.
Step 15
pvc vpi/vci [ces]
Example:
Router(config-if)# pvc 6/66 ces
Creates a PVC for the virtual path identifier (VPI) and virtual channel identifier (VCI) and specifies CES encapsulation. Enters interface-ATM-VC configuration mode.
Step 16
ces-cdv time
Example:
Router(config-if-ces-vc)# ces-cdv 1000
Configures the CDV for 1000 microseconds.
Step 17
exit
Example:
Router(config-if-ces-vc)# exit
Exits back to interface configuration mode.
Step 18
exit
Example:
Router(config-if)# exit
Exits back to configuration mode.
Step 19
connect connection-name atm slot/port [name of 
PVC/SVC|vpi/vci] E1 slot/port TDM-group-number
Example:
Router(config)# connect alpha-IMA atm0/ima0 
5/55 E1 2/0 1 
Establishes the connection between the T1 or E1 controller ports and the IMA group.
Configuration Examples for AAL1 CES on AIM-ATM

This section provides the following configuration examples:

•Configuring AAL1 CES on AIM-ATM: Example

•Verifying the AAL1 CES on AIM-ATM Feature : Example

Configuring AAL1 CES on AIM-ATM: Example

The following is a sample configuration for the AAL1 CES on AIM-ATM feature.
network-clock-participate slot 1 
network-clock-participate slot 2 
network-clock-participate aim 1
controller E1 2/0
 framing NO-CRC4 
 clock source internal
 tdm-group 1 timeslots 1 
Note TDM-group defined for 1 timeslot.
 tdm-group 2 timeslots 17-31
Note TDM-group defined for 15 timeslots.
interface ATM2/2
 scrambling-payload
 no atm ilmi-keepalive
 pvc 4/44 ces         
Note Default CDV value set to 5 microseconds.
 pvc 8/88 ces
  ces-cdv 1000            
Note Default CDV value set to 1 second.
connect alpha-tim ATM2/2 4/44 E1 2/0 1
connect beta-tim ATM2/2 8/88 E1 2/0 2   
Note CES connections for TDM-AAL1 CES PVCs.
interface ATM2/1
 ima-group 0
 scrambling-payload
 no atm ilmi-keepalive
interface ATM2/3
 ima-group 0
 scrambling-payload
 no atm ilmi-keepalive
int atm0/ima0
pvc 5/55 ces   
Note Default CDV value set to 5 microseconds.
 partial-fill 35
Note Range of partial-fill 1-46 for T1 or 20-47 for E1.
 pvc 6/66 ces
  ces-cdv 1000             
connect alpha-IMA atm0/ima0 5/55 E1 2/0 1 
Verifying the AAL1 CES on AIM-ATM Feature : Example

The following shows sample output from the show connection all command. This command displays all ATM-TDM connections:
Router# show connection all
ID   Name               Segment 1            Segment 2           State       
========================================================================
.
.
2    V-220-800          E1 2/2(VOICE) 00     DSP 08/00/00        UP          
4    1ds0               ATM2/2 pvc 4/44      E1 2/0 01           UP          
5    V-201-801          E1 2/0(VOICE) 01     DSP 08/00/01        UP          
6    seimens            ATM2/2 pvc 8/88      E1 2/0 02           UP          
.
.
The following example shows sample output from the show connection name command. This command displays segments used, CDV, and partial fill values for CES connections. Default CDV is set for 5 milliseconds.
Router# show connection name 1ds0
Connection: 4 - 1ds0
 Current State: UP
 Segment 1:  ATM2/2 pvc 4/44
 Segment 2:  E1 2/0 01
  TDM timeslots in use: 1 (1 total)
 Internal Switching Elements: VPD
 CES-CDV: 5000 usec, Partial Fill: 0 bytes
The following example shows sample output from the show atm pvc command. This command displays all PVCs in use. It also displays the Allocated Peak Value for each connection.
Router# show atm pvc
           VCD /                                        Peak  Avg/Min Burst
Interface  Name         VPI   VCI  Type   Encaps   SC   Kbps   Kbps   Cells Sts
2/3        TDM10         15   150  PVC    CES-AAL1 CBR     723               UP
2/3        TDM11         20   200  PVC    CES-AAL1 CBR     795               UP
Note Only synchronous clocking is supported.

Additional References

The following sections provide references related to the AAL1 CES on AIM-ATM feature.

Related Documents

Related Topic

Document Title

ATM commands

Cisco IOS Asynchronous Transfer Mode Command Reference

Configuring voice features

Cisco IOS Voice Configuration Library, Release 12.4T

Configuring ATM advanced integration modules

AIM-ATM, AIM-VOICE-30, and AIM-ATM-VOICE-30 on the Cisco 2600 Series, Cisco 3660, and Cisco 3700 Series

Configuring high-density voice network modules

Digital E1 Packet Voice Trunk Network Module Interfaces

Standards

Standard

Title

None

—

MIBs

MIB

MIBs Link

None

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs

RFCs

RFC

Title

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.

—

Technical Assistance

Description

Link

The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

http://www.cisco.com/techsupport

Command Reference

The following commands are introduced or modified in the feature or features documented in this module. For information about these commands, see the Cisco IOS Asynchronous Transfer Mode Command Reference at http://www.cisco.com/en/US/docs/ios/atm/command/reference/atm_book.html. For information about all Cisco IOS commands, use the Command Lookup Tool at http://tools.cisco.com/Support/CLILookup or a Cisco IOS master commands list.

•pvc

Feature Information for AAL1 CES on AIM-ATM

Table 1 lists the features in this module and provides links to specific configuration information. Only features that were introduced or modified in Cisco IOS Releases 12.2(1), 12.0(3)S, 12.2(33)SRA, 12.2(33)SXH, or later releases appear in the table.

Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.

Table 1 Feature Information for AAL1 CES on AIM-ATM

Feature Name

Releases

Feature Information

AAL1 CES on AIM-ATM

12.3(8)T

The AAL1 CES on AIM-ATM feature adds circuit emulation service (CES) over ATM AAL1 to Cisco 3660 and Cisco 3745 routers. CES is a technique specified by the ATM Forum for carrying constant bit-rate traffic over an ATM network. It is a cell-based technology where voice traffic is adapted for an ATM network using AAL1, and the circuit is emulated across an ATM network. This feature, along with the ATM Cell Switching and Lossless Compression R1 feature, enables wireless service providers to optimize the bandwidth used to backhaul the traffic from a cell site to the mobile central office for more efficient use of existing T1 and E1 lines.

In 12.3(8)T, this feature was introduced on the Cisco 3660 and Cisco 3745 routers.

The following sections provide information about this feature:

•CES

•Configuring AAL1 CES on AIM-ATM

•Configuring IMA Groups

The following commands were introduced or modified: pvc.

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Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.

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