Asynchronous Transfer Mode Configuration Guide, Cisco IOS Release 15M&T

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table.

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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 AAL1 CES on AIM-ATM

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

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 the figure below.

Figure 1. AAL1 CES on AIM-ATM Sample Configuration

Configuring AAL1 CES on AIM-ATM
Configuring IMA Groups

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] T1 slot/port TDM-group-number

20. connect connection-name atm slot/port [name of PVC/SVC | vpi/vci] T1 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-v c)# 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-i f)# 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 to add ATM 2/3 to IMA group 0.

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

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 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

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

Feature Information for AAL1 CES on AIM-ATM

The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to . An account on Cisco.com is not required.

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 commands were introduced or modifief: pvc.

Bias-Free Language

Book Title

Asynchronous Transfer Mode Configuration Guide, Cisco IOS Release 15M&T

Chapter Title

AAL1 CES on AIM-ATM

Results

Chapter: AAL1 CES on AIM-ATM

AAL1 CES on AIM-ATM

Finding Feature Information

Prerequisites for AAL1 CES on AIM-ATM

Restrictions for AAL1 CES on AIM-ATM

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

Feature Information for AAL1 CES on AIM-ATM

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