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Table of Contents

Call Control Interface Configuration

Call Control Interface Configuration

The Cisco MGX 8260 works in conjunction with Media Gateway Controller (MGC) servers or Soft Switches and the Public Switched Telephone Network (PSTN) to control voice and data calls.

Understanding MGCP

This section describes how to configure and view MGCP (Media Gateway Control Protocol). The Cisco MGX 8260 implements the standard MGCP protocol stack (see Figure 5-1).


Figure 5-1: MGCP Protocol Stack


The protocol stack contains the following layers:

Only the IP layer requires configuration. The following diagram shows how to configure MGCP IP addresses in a fully-redundant system (see Figure 5-2).


Figure 5-2: MGCP Addresses and Ports


The minimal system consists of a primary MGC network, the MGX 8260 Media Gateway, and an IP network. You can add the secondary network or MGC for more reliable operation.

Configuration Tasks for MGCP

To configure MGCP, you perform the following tasks:

Configuring the MGCP Domain Name and Viewing Connection Status

Before beginning this procedure, obtain the domain name for your MGCP interface.

To configure the domain name and view connection status information, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click MGCP.

Step 3   Click Default.

The MGCP Default Setting screen opens.


Step 4   Interpret the connection status information as follows:

Parameter

Description

 Connection Status


 The current status of the MGCP connection, as follows:


  • unknown—undefined status
    

  • connected—message is sent and response to it is received
    

  • connecting—message is sent and waiting for response
    

  • noSuchName—no domain name/IP address is found
    

  • noResponse—timeout on message 
    



 Con. Status Time Stamp


 The time the connection status last changed.

Step 5   In the Domain Name section, click Set.

The MGCP Domain Name Setting screen opens.

Step 6   Enter the domain name or IP address of the MGX 8260, and click Modify.

Configuring MGCP IP Addresses

Before beginning this procedure, obtain the IP addresses and ports for your MGCP interface. Make sure your IP and port selections do not conflict with other equipment on the networks.

To configure MGCP IP addresses, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click MGCP.

Step 3   Click Default.

The MGCP Default Setting screen opens.


Step 4   Interpret the connection status information as follows:

Parameter

Description

 Connection Status


 The current status of the MGCP connection, as follows:


  • unknown—undefined status
    

  • connected—message is sent and response to it is received
    

  • connecting—message is sent and waiting for response
    

  • noSuchName—no domain name/IP address is found
    

  • noResponse—timeout on message 
    



 Con. Status Time Stamp


 The time the connection status last changed.

Step 5   Click Set in either the Primary, Secondary, or Local sections of the MGCP Default Setting form.

The respective Primary MGCP Setting, Secondary MGCP Setting, or Local MGCP Setting form opens.

Step 6   Specify the MGCP parameters:

Parameter

Description

 Primary MGCP Address 1


 The IP address of the primary MGC for network 1. Use the standard dot notation for IP addresses.


 Primary MGCP UDP Port 1


 The default UDP port of the primary MGC for network 1.


 Primary MGCP Address 2


 The IP address of the primary MGC for network 2. Use the standard dot notation for IP addresses.


 Primary MGCP UDP Port 2


 The default UDP port of the primary MGC for network 2.


 Secondary MGCP Address 1


 The IP address of the secondary MGC for network 1. Use the standard dot notation for IP addresses.


 Secondary MGCP UDP Port 1


 The default UDP port of the secondary MGC for network 1.


 Secondary MGCP Address 2


 The IP address of the secondary MGC for network 2. Use the standard dot notation for IP addresses.


 Secondary MGCP UDP Port 2


 The default UDP port of the secondary MGC for network 2.


 Local Address 1


 The IP address of the Media Gateway interface for network 1. This address needs to be on the same subnet as the Primary MGCP Address. Specify the IP address in standard dot notation.


 Local Primary Port 1


 The primary UDP port of the Media Gateway interface for network 1.


 Local Address 2


 The IP address of the Media Gateway interface for network 2. This address needs to be on the same subnet as the Secondary MGCP Address. Specify the IP address in standard dot notation.


 Local Primary Port 2


 The primary UDP port of the Media Gateway interface for network 2.

Step 7   Click Modify. The system configures the MGCP IP addresses.

Configuring MGCP Core Settings

MGCP core settings enable and disable the protocol and control how it works.

To configure MGCP core parameters, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click MGCP.

Step 3   Click Core.

The MGCP Core Setting screen opens, displaying the status, settings, and other information related to MGCP messages.


Step 4   Interpret the core status information as follows:

Parameter

Description

 Operational Status


 The administrative state, as follows:


  • up—MGCP is up and running
    

  • bringUpInProgress—MGCP is coming up
    

  • shutDownInProgress—MGCP is shutting down
    

  • down—MGCP is administratively down
    



 Incoming Messages With Bad Version


 The total number of incoming messages delivered to the protocol entity that were for an unsupported protocol version.


 UnRecognized Packets


 The number of unrecognized packets.


 Capabilities Package Name


 A list of the capabilities packages:


  • Generic Media Package 
    

  • DTMF package 
    

  • MF Package 
    

  • Trunk Package
    

  • Line Package 
    

  • Handset Package 
    

  • RTP Package
    

  • Network Access Server Package 
    

  • Announcement Server Package 
    

  • Script Package

Step 5   Click Set.

The MGCP Core Setting screen opens.


Step 6   Enter new MGCP core parameters.

Parameter

Description

 Request Timeout


 The time to wait before retransmitting packets. Values: 1 to 100000.


 Request Retries


 The maximum number of retries for a request that times out. Values: 0 to 15.


 Restart InProg. Maximum Waiting Delay 


 The maximum waiting delay, in milliseconds, before the Media Gateway interface sends the Restart In Progress message to the Media Gateway Controller. Values: 0 to 600000.


 Restart Delay


 The delay for a graceful shutdown. Values 0 to 600


 Response TimeOut


 The time in milliseconds to wait before retransmitting unacknowledged messages. Values: 1 to 100000.


 Connectivity Timeout


 The time in milliseconds to wait for a request from MGCP before dropping the link. Values: 1 to 100000.


 Admin. Status


 The desired state of the protocol. Click Set Admin Status to change the setting.


  • 1—up - bring up protocol administratively
    

  • 2—down - bring down protocol administratively
    

  • 3—gracefulDown - gracefully shut down protocol

Step 7   Select (Set) Admin. Status.

Step 8   Select a setting.

Step 9   Click Set New Status to change the value and return to the MGCP Core Setting screen.

Step 10   Click Modify. The system configures the MGCP core settings.

Viewing Message Statistics

To view MGCP message statistics, follow these steps.

Step 1   On the Navigation pane, click Protocol.

Step 2   Click MGCP.

Step 3   Click Message Stats.

The MGCP Message Statistics screen opens, displaying the statistics.


Step 4   Click Display. The system refreshes the display of MGCP statistics.

Configuring Default Call Setup Parameters

Call setup requires the default type of network, packetization period, bandwidth, echo cancellation, silence suppression, type of service, resource reservation, and COT receive and transmit tones. This section describes how to set default values for these parameters.

To configure MCP scalars, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click MGCP.

Step 3   Click MPC Scalars.

The MPC Scalar screen opens.


Step 4   Click Set.

The MPC Scalars Setting screen opens.


Step 5   Select new settings:

Parameter

Description

 Default Type of Network


 The type of network, voice-over-IP, voice-over-ATM, or local


 Packetization Period


 Packetization Period in milliseconds. Value: fixed at 10


 Bandwidth


 The network bandwidth in kbps. Values: 8 and 64 kbps


 Echo Cancellation


 Enables or disables echo cancellation.


 Silence Suppression


 Enables or disables silence suppression.


 Type of Service


 The type of Service. Values: 1-256, where 1 indicates no service type


 Resource Reservation


 The resource reservation type. Values:


  • bestEffort
    

  • guaranteed
    

  • notUsed
    

  • controlledLoad
    



 Default COT Receive Tone


 The default receive tone. For transponder COT, when the media gateway controller does not supply the tones, the default tone the gateway receives is the default COT receive tone. Values:


  • co1
    

  • co2
    



 Default COT Transmit Tone


 The default transmit tone. For transponder COT, when the media gateway controller does not supply the tones, the default tone the gateway transmits is the default COT transmit tone. Values:


  • co1
    

  • co2
    



 Default Encoding Type


 The type of voice encoding when not specified by the MGC:


  • PCMU—G711 Mu -law encoding
    

  • PCMA—G711 A-law encoding
    

  • G729A
    

  • G726_32K

Step 6   Click Modify.

The system configures the MGCP core settings.

Step 7   Go back to the MPC Scalars screen.

Step 8   Click Display.

The system refreshes the display of settings on the MPC Scalars screen.

Understanding Sessions

The session manager organizes individual sessions into groups and sets (see Figure 5-3).


Figure 5-3: Organization of Sessions


The backhaul sessions and groups include the following components:

When adding sessions, you create a structure that supports reliable operation. The goal for a fully-redundant system is to provide multiple management sessions to multiple MGCs via multiple physical networks (see Figure 5-4).


Figure 5-4: Logical Session Model


With full redundancy, you configure the following:

  This assumes that every transport address has corresponding IP interface address and a UDP port unique for that IP address.

If the MGC can't handle all D Channels in one session set, you configure another similar set using different UDP ports and D Channels.

Configuration Tasks for Sessions

To configure ISDN backhaul signaling, perform the following tasks:

Configuring Session Sets

You can view and set session sets.

Viewing Session Set Information

To view session set status, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click Backhaul.

Step 3   Click Set.

The Session Set screen opens.


Step 4   View the session set summary.

Displayed Information

Description

 Index


 The session set index number.


 State


 The state of the session set:


  • idle
    

  • outOfService
    

  • standby
    

  • active
    

  • full
    

  • switchOver
    



 Total Groups


 The total number of groups added to this Session Set.


 Min Slot


 The minimum MGX 8260 slot number for this Session Set.


 Min Line


 The minimum line number for this Session Set. 


 Max Slot


 The maximum MGX 8260 slot number for this Session Set.


 Max Line


 The maximum line number for this Session Set. 


 Redun Mode


 The current redundancy mode:


  • nonFaultTolerant
    

  • faultTolerant
    



 Active Group


 The group number which is in the Active state. Displays -1 if no group is active.


 Switch Failed


 The total number of switchover failures.


 Switch Succeeded


 The total number of switchover successes.


 Down Count


 The number of times the session set went down.

Adding a Session Set

To add a session set, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click Backhaul.

Step 3   Click Set.

The Session Set screen opens.

Step 4   Click the + icon.

The Add Session Set form opens.


Step 5   Configure the session set parameters.

Parameter

Description

 Set Index


 An index number for the new set.


 Redundant Mode


 The redundancy mode:


  • nonFaultTolerant
    

  • faultTolerent
    



 Minimum Slot Number


 The minimum MGX 8260 slot number for this Session Set.


 Range: 1-8 and 11-16


 Maximum Slot Number


 The maximum MGX 8260 slot number for this Session Set.


 Range: 1-8 and 11-16


 Minimum Line Number


 The minimum line number for this Session Set. 


 Range if Min Slot is a BSC: 1-168


 Range if Min Slot is a NSC: 1-16


 Maximum Line Number


 The maximum line number for this Session Set. 


 Range if Max Slot is a BSC: 1-168


 Range if Max Slot is a NSC: 1-16

Step 6   Click Add.

Deleting a Session Set

To delete a session set, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click Backhaul.

Step 3   Click Set.

The Session Set screen opens.

Step 4   Click the - icon for the set you want to delete; then confirm your action.

Configuring Session Groups

You can view and add session groups.

Viewing Session Group Information

To view session set status, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click Backhaul.

Step 3   Click Group.

The Session Group screen opens.


Step 4   View the session group summary.

Displayed Information

Description

 Set Index


 The set number to which this group belongs


 Gr. Index


 The group index number


 Gr. State


 The state of the session group:


  • outOfService
    

  • inService
    



 Use State


 The use state of the session group:


  • none
    

  • standby
    

  • active
    



 Act. Sess


 The active session number of the Group. Displays -1 if no session is active.


 Prev Sess


 The previously active session set ID of the Group.


 Total Sess


 The total number of sessions for the Group.


 Total Act Sess


 The total number of active sessions in the Group


 Sess Fail


 The total number of session failures for the Group. 


 Fail Over Success


 The total number of failover successes for this Group.


 Active Pkts Rcvd


 The total number of packets Received for this Group.


 Standby Pkts Rcvd


 The total number of packets sent by this Group.


 PDU Post Err


 The total number of active packets received for this Group.

Adding a Session Group

To add a session group, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click Backhaul.

Step 3   Click Group.

The Session Group screen opens.

Step 4   Click the + icon.

The Add Session Group form opens.


Step 5   Configure the session group parameters.

Parameter Description

Session Group Index Number

A group number for the new group.

Session Set Index Number

The index number of the set to which this group belongs.

Step 6   Click Add.

Deleting a Session Group

To delete a session group, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click Backhaul.

Step 3   Click Group.

The Session Group screen opens.

Step 4   Click the - icon for the group you want to delete; then confirm your action.

Configuring sessions

You can view and add sessions.

Viewing Session Information

To view session status, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click Backhaul.

Step 3   Click Session.

The Session screen opens.


Step 4   View the session summary.

Displayed Information

Description

 Set Index


 The session set to which the group containing the session manger belongs.


 Group Index


 The session group of which the session is a member.


 Sess. Index


 The session number.


 Priority


 The session connection priority.


 State


 The session state:


  • open
    

  • openWait
    

  • openXfer
    

  • close
    

  • closeWait
    

  • userClose
    

  • autoReset
    



 InUse State


 The use state of the session:


  • outOfService
    

  • inService
    

  • blocked
    



 Local Port


 The local UDP Port.


 Local addr


 The local IP address of the connection.


 Remote Port


 The remote UDP port.


 Remote Addr


 The remote IP address of the connection.

Adding a Session

To add a session connection, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click Backhaul.

Step 3   Click Session.

The Session screen opens.

Step 4   Click the + icon.

The Add Session form opens.


Step 5   Set the Session Index, Group Index, and Set Index.

Parameter

Description

 Session Index


 The session identifier. A session represents a `physical' connection between the media gateway and media gateway controller. 


 Group Index


 Session group identifier. A session group consists of one or more RUDP sessions.


 Set Index


 The session set identifier. A session set is a collection of session groups, each connecting to a different media gateway controller. Use session sets for redundant media gateway controller architectures.

Step 6   Configure the session connection parameters.

Parameter

Description

 Priority


 The session priority.


 Local Port


 The local port for the session.


 Local Address


 The local IP address for the session.


 Remote Port


 The remote port for the session.


 Remote Address


 The remote IP address for the session.

Step 7   Click Add.

Deleting a Session

To delete a session, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click Backhaul.

Step 3   Click Session.

The Session screen opens.

Step 4   Click the - icon for the manager you want to delete; then confirm your action.

Viewing Session Counters

To view session counters, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click Backhaul.

Step 3   Click Session.

The Session screen opens.

Step 4   Click the C icon on the session of interest.

Step 5   The Session Counters screen opens, displaying session counter values.

Understanding ISDN D Channels Usage

The MGX 8260 Media Gateway extends D Channel signaling to a Media Gateway Controller via a backhaul channel (see Figure 5-5).


Figure 5-5: D Channel to Media Gateway Controller


Each BSC contains 168 T1 lines, each a potential Primary Rate ISDN line. An ISDN line contains 24 channels, one of which is the D Channel that carries the signaling information for the other 23 channels. The BSC card can terminate a D Channel signaling stack and pass the payload to a Media Gateway Controller, via the SCC, using a backhaul session.

The following procedures describe how to configure a D Channel for a backhaul session. The procedures assume you already have a DS3 line and have provisioned a PRI ISDN line on one of its circuits. ISDN D Channels can be difficult to configure because they have many settings, so the Cisco MGX 8260 simplifies the process by grouping common settings into two types of profiles:

The Digital Link Service Access Profile (DLSAP) and Media Access Control Service Access Profile (MACSAP) profiles define different levels of the ISDN protocol stack (see Figure 5-6).


Figure 5-6: DLSAP and MACSAP Interfaces


When adding D Channels, you simply specify suitable profiles that contain the desired configuration set. You can create profiles using default settings that accommodate the signaling requirements for common applications.

Configuration Tasks for D Channels

The Cisco MGX 8260 simplifies the process of creating D Channels with DLSAP and MACSAP profiles. These profiles provide a template of parameter settings that you apply when adding D Channels. Changes you make to the profiles only apply to lines you subsequently add, not to lines that already exist. If you want to change the configuration of a D Channel, delete it first and then recreate a new one using the new template.

The following section describes the high-level procedure for configuring a D Channel on an existing DS3 trunk:

Step 1   Define a DLSAP profile (see Adding a MACSAP Profile).

Step 2   Define a MACSAP profile (see Adding a DLSAP Profile).

Step 3   Define a D Channel on a PRI ISDN line within the DS3 trunk, using the profiles you defined in Steps 1 and 2 (see Adding D Channels).

Adding a MACSAP Profile

MACSAP management consists of adding and deleting profiles. You need at least one profile to add D Channels.

To add a MACSAP profile, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click ISDN.

Step 3   Click Macsap Profile.

The Macsap Profile screen opens.


Step 4   Click the + icon.

The Add Macsap Profile form opens.


Step 5   Specify the Macsap profile parameters.

Parameter

Description

 Profile Index


 A numeric identifier for the profile. Values: 1 to 20


 MACSAP Interface


 The type of profile. Value: network


 Link Setup Arbitration Scheme


 The link setup arbitration scheme. Values: passive or active.


 LAPD Type


 The LAPD interface type


 Maximum Outstanding Frames


 The maximum number of sequentially numbered I-frames that may be outstanding. Values: 1 to 255


 Timer Queue Up Threshold


 The upper threshold for I-frame queue. When the I-frame queue size exceeds this threshold, the congestion timer is started and flow-control is turned on. Values: 1 to 32767


 Timer Queue Low Threshold


 The lower threshold for I-frame queue. When the I-frame queue size falls below this threshold, the congestion timer is stopped and flow-control is turned off. Values: 1 to 32767


 Connection Timer


 The connection timer. Values: 1 to 1024


 T201 Timer


 The minimum time between transmissions of the TEI Identity check message, in seconds. Values: 1 to 1024


 T202 Timer


 The minimum time between retransmission of the TEI Identity request message, in seconds. Values 1 to 1024


 TEI Check Timer


 The TEI check timer. The value 1025 means the TEI Check Timer is disabled. Values: 1 to 1025, where 1025 = disables


 N202


 Minimum time between transmissions of TEI Identity check messages


 Lowest Range of Automatic TEI


 The allocated TEI value. When configured for Automatic TEI Assignment, ASP can allocate TEIs greater than or equal to Lowest Automatic TEI. Values: 1 to 127


 Keep Mac Up All The Time


 The state of the Keep MAC Up All The Time flag. Values: true or false

Step 6   Click Add. The system adds the profile and updates the Macsap Profile screen.

Note   If you add an incorrect profile, delete the profile using the - icon and start over.

Adding a DLSAP Profile

DLSAP management consists of adding and deleting profiles. You need at least one profile to add D Channels.

To add a DLSAP profile, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click ISDN.

Step 3   Click Dlsap Profile.

The Dlsap Profile screen opens.


Step 4   Click the + icon.

The Add Dlsap Profile form opens.


Step 5   Specify the Dlsap profile parameters.

Parameter

Description

 Profile Index


 A numeric identifier for the profile. Values: 1 to 20.


 Frame Length


 The frame length, which is the maximum number of octets in an information field. Values: 1 to 1960. Default: 1960.


 Window Size


 The maximum number of sequentially numbered I-frames that may be outstanding. This window-size depends on the modulo. If the modulo is 8, then this range is (1 - 8) and if the modulo is 128, then the range of the window size is (1 - 128).


 Maximum Retransmissions
Count


 The maximum number of retransmissions of a frame. Values: 1 to 1023. Default: 3


 Congestion Timer


 The time after which DLCs are dropped during periods of network congestion, in seconds. Values: 1 to 1023. Default: 200


 T200 Timer


 The wait time before frame transmission may be initiated, in seconds. Values: 1 to 3. Default: 1


 T203 Timer


 The maximum time between retransmission of the TEI identity request message, in seconds. Values 20 to 60. Default: 10


 Modulus


 Each I-frame is sequentially numbered and may have values 0 through (N-1) where N is this modulus. Values: 8 or 128. Default: 128


 TEI Assign


 The Terminal Endpoint Identifier assignment setting:


    

    	1. automatic—TEI is selected by the ASP Layer Management procedure on the network side. Default: 2, which yields a TEI of 1.
    

    	2. nonAutomatic—TEI is selected by the user (default)
    



 Max DLCs


 The maximum number of DLCs for this DLSAP. Values: 1 to 16. Default: 1


 Starting TEIs


 The starting number for reassigning TEIs. This number is used in conjunction with the previous two parameters to number TEIs. For example, if TEI Assignment is nonAutomatic, Maximum DLCs for this DLSAP is 4, and TEI is 14. When a DChannel is added, 4 TEIs starting at 14 are preconfigured. Values: 0 to 63

Step 6   Click Add. The system adds the profile and updates the Dlsap Profile screen.

Deleting a Profile

To delete a dlsap or macsap profile, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click ISDN.

Step 3   Click Dlsap Profile or Macsap Profile.

The Dlsap Profile or Macsap Profile screen opens.

Step 4   Click the - icon for the profile you want to delete; then confirm your action.

Viewing LAPD Parameters

You don't need to configure LAPD, but you can view its status.

To view LAPD status, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click ISDN.

Step 3   Click Lapd.

The LAPD Card Table screen opens.


Step 4   View the LAPD summary.

Displayed Information

Description

 Card Index


 The physical card number


 Number of Phy. Links


 The total number of physical links for this instance of LAPD on the card


 Num of DLCs


 The total number of DLCs for this instance of LAPD on the card


 Num of LAPD Links


 The total number of LAPD links for this instance of LAPD on the card


 Num of ASPs


 The number of Assigned Source Points

Step 5   Click Back to close the screen.

Adding D Channels

The Cisco MGX 8260 communicates with PSTN equipment over Primary Rate Interface (PRI) ISDN D Channels.

Adding a D Channel requires an existing DS3 line and suitable DLSAP and MACSAP profiles.

To add a D Channel, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click ISDN.

Step 3   Click DChan Config.

The DChan Config screen opens.


Step 4   Click the + icon.

The Add D Channel Configuration form opens.


Step 5   Specify the D Channel parameters.

Parameter

Description

 Slot


 The slot number for this DChannel


 Line


 The line number for this DChannel.


 Contiguous Creating Lines


 The number of DChannels to add.


 DLSAP Profile Number


 The instance number of a DlSap profile. The profile defines a template for the configuration; the DlSap instance number is created from the template.


 Ds0 Number


 The time slot to use for the DChannel


 MacSap Profile Number


 The instance number of a MacSap profile. The profile defines a template for the configuration; the MacSap instance number is created from the template.


 Ds0 Format


 The DChannel format, either 56 or 64 kbps

Step 6   Click Add. The system adds the D Channel and updates the DChan Config screen.

Changing a D Channel

To change a D Channel, delete the desired D Channel and then add a new one. When creating the new channel, choose a DLSAP and MACSAP profile that contains the desired settings. If such a profile doesn't exist, create one first before adding the new D-Channel. For more information on the relationship between D Channels and profiles, see Configuration Tasks for D Channels.

Deleting a D Channel

To delete a D Channel, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click ISDN.

Step 3   Click DChan Config.

The DChan Config screen opens.

Step 4   Click the - icon for the D Channel you want to delete; then confirm your action.

Viewing D Channel Details

To view D Channel detail information, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click ISDN.

The DChan Config screen opens.

Step 3   Click the i icon on the D Channel of interest.

The system displays configuration information for the D Channel.


Viewing D Channel Counters

To view D Channel counters, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click ISDN.

The DChan Config screen opens.

Step 3   Click the i icon on the D Channel of interest.

The system displays Counter information for the D Channel.

Viewing DLSAP Counters

To view DLSAP counters, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click ISDN.

The DChan Config screen opens.

Step 3   Click the A icon on the D Channel of interest.

The system displays DLSAP Counter information for the D Channel.

Viewing MACSAP Counters

To view MACSAP counters, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click ISDN.

The DChan Config screen opens.

Step 3   Click the C icon on the D Channel of interest.

The system displays MACSAP Counter information for the D Channel.

Configuration Tasks for IPDC

IPDC is an alternative for MGCP for controlling voice calls through the Cisco MGX 8260. When using IPDC, you don't need to configure sessions or backhaul channels.

To configure IPDC, perform the following tasks:

Switching from MGCP to IPDC

The Cisco MGX 8260 supports two call control protocols, MGCP and IPDC. By default, MGCP is enabled and IPDC is disabled. To switch to IPDC you must change the active protocol type and reset the chassis.

Warning Switching protocols interrupts service. Perform this operation during light traffic periods or in a pre-arranged maintenance window.

To switch protocols, follow these steps:

Step 1   On the Navigation pane, click Node.

Step 2   Click System.

Step 3   On the Configuration Setting form, click the Set link on the Gateway Control Protocol line. The System Gateway Control Protocol Setting form opens.

Step 4   Select the protocol type, either MGCP or IPDC.

Step 5   Click Modify. The system resets and drops your management session.

Step 6   Log in and continue configurations.

Configuring Soft Switch IP Addresses

Before beginning this procedure, obtain the IP addresses and ports that apply to your system. Make sure your IP and port selections do not conflict with other equipment on the network.

To IPDC IP addresses, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click IPDC.

Step 3   Click Configuration.

The IPDC Configuration screen opens, which includes the Soft Switch Configuration form:


The form displays IP addresses and operational status for the Soft Servers. To change the settings, perform the following steps.

Step 4   In the Gateway section, click Set.

The IPDC Gateway Setting form opens.


Step 5   Specify the IP gateway parameters.

Parameter

Description

 IP Address


 The IP address of the gateway router for IPDC traffic, expressed in standard dot notation.


 TCP Port


 The TCP port to use. Values: 1025 to 65535. Default: 5000

Step 6   Click Modify; then click Display IPDC Configuration. The IPDC Configuration screen reopens.

Step 7   In the Primary Soft Switch section, click Set.

The Primary Soft Switch Setting form opens.


Step 8   Specify the primary Soft Switch parameters.

Parameter

Description

 IP Address


 The IP address of the primary Soft Server, expressed in standard dot notation.


 TCP Port


 The TCP port to use. Values: 1025 to 65535. Default: 5000


 Health Check


 The link health check feature. Values: enabled or disabled. Default: enabled


 Administrative Status


 The operational status of the link. Values: up or down. Default: down

Step 9   Click Modify; then click Display IPDC Configuration. The IPDC Configuration screen reopens.

Step 10   For redundancy, click Set in the Secondary Soft Switch section and repeat Steps 8 and 9.

Configuring a Pseudo IP Address

The Cisco MGX 8260 supports a single pseudo-IP address for the four broadband ports. Use this procedure to initialize this address.

To configure a pseudo-IP address, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click IPDC.

Step 3   Click Configuration.

The IPDC Configuration screen opens, which includes the Status and Core Setting form:


Step 4   In the Pseudo IP Address section, click Set.

The IPDC Pseudo IP Address Setting form opens.


Step 5   Specify the pseudo-IP address, in standard dot notation. Select an IP address that is in the same subnet as the broadband ports.

Step 6   Click Modify; then click Display IPDC Configuration. The IPDC Configuration screen reopens.

Configuring IPDC Core Settings

To configure IPDC core settings, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click IPDC.

Step 3   Click Configuration.

The IPDC Configuration screen opens, which includes the Status and Core Setting form:


The form displays current operational status for the Soft Switches, along with configuration information for the core settings. To change the core settings, perform the following steps.

Step 4   In the upper section, click Set.

The IPDC Configuration Setting form opens.


Step 5   Specify the core IPDC parameters.

Parameter

Description

 System ID


 An identifier for the gateway being controlled by IPDC protocol. Value:Text string from 0 to 24 characters.


 System Type


 An identifier for the manufacturer and model of the access server. Value:Text string of exactly 9 characters


 Maximum number of modules supported


 Maximum number of modules (slot cards) supported. Values: 1 to 16


 Bay Number of the gateway being controlled


 The number associated with Cisco MGX 8260 being controlled. Value:Text string of exactly 8 characters.


 Number Format


 The numbering format that the Soft Switch uses to interpret module, line, and channel numbers on an MGX 8260. Values: zeroBased or oneBased. 


 Health Check Response Timer


 The time to wait after sending the heartbeat before bringing down the link. Values: 400 to 10000 msec. Default 1000


 Graceful Down Timer


 The graceful disconnect time for both Soft Switches. Values: integer seconds from 0 - 32767 seconds. Value: 0 (no graceful down)

Step 6   Click Modify; then click Display IPDC Configuration. The IPDC Configuration screen reopens.

Configuring COT Settings

To configure continuity test settings, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click IPDC.

Step 3   Click Configuration.

The IPDC Configuration screen opens, which includes the COT Configuration form:


The form displays the current COT configuration. To change the settings, perform the following steps.

Step 4   Click Set.

The IPDC COT Configuration Setting form opens.


Step 5   Specify the core COT parameters.

Parameter

Description

 COT Receive Tone


 IPDC COT receive tone. Values: co1 (2010 Hz) or co2 (1780 Hz)


 COT Transmit Tone


 IPDC COT transmit tone. Values: co1 or co2

Step 6   Click Modify.

Configuring IPDC Timers and Counters

IPDC timers and counters control how the link behaves under abnormal or fault conditions. You can use the default settings, or provide a custom set.

To configure a IPDC timers, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click IPDC.

Step 3   Click Timer.

The IPDC Timer Configuration screen opens:


The form displays the current timer and counter configurations. To change these settings, perform the following steps.

Step 4   Click Set.

The IPDC Timer Configuration Setting form opens.


Step 5   Specify the timer parameters.

Minimum Soft Switch Connection Retry Interval when link is up

Minimum connection retry interval for primary or secondary Soft Switch when the link is up. The connection interval doubles with every retry attempt until the ssConnRetryThr value is reached. Values: integer 2000 to 15000 msec. Default: 4000 msec

Maximum Soft Switch Connection Retry Interval for backoff scheme

Maximum Soft Switch connection retry interval. Values: integer 16000 to 256000 msec. Default: 64000 msec

TCP Connection Retry Interval when link is not up

Retry interval for a TCP connection when the link is down. Values: 1000 to 10000 msec. Default: 2000 msec

NSUP Message Retry Timer, which stops after receive of ASUP

Retry interval for NSUP message. The timer stops after receipt of ASUP. Values: 1000 to 10000 msec. Default: 2000 msec

Link Activity Testing Timer when link is down

The time this device waits for a message from the Soft Switch before declaring the link down. If the health check is enabled, the link stays up until the heartbeat times out. Values: 1000 to 600000 msec. Default 60000 msec

Maximum TCP Connection Attempts when link is down

The maximum number of TCP connection attempts when the link is down. Values 0 to 10. Default: 1 retry

Maximum NSUP Retransmission Attempts when link is down

The maximum NSUP retransmission attempts when the link is down. Values: 0 to 10. Default 2 attempts

Step 6   Click Modify.

Activating IPDC and the Health Check

To activate IPDC links, follow these steps:

Step 1   On the Navigation pane, click Protocol.

Step 2   Click IPDC.

Step 3   Click Configuration.

The IPDC Configuration screen opens, which includes the Soft Switch Configuration form:


Step 4   Click Modify; then click Display IPDC Configuration. The IPDC Configuration screen reopens.

Step 5   In the Primary Soft Switch or Secondary Soft Switch section, click Set.

The Primary Soft Switch Setting or Secondary Soft Switch Setting form opens.


Step 6   Activate the protocol and health check.

Parameter

Description

 Health Check


 The link health check feature. Values: enabled or disabled. Default: enabled


 Administrative Status


 The operational status of the link. Values: Up or Down. Default: down

Step 7   Click Modify; then click Display IPDC Configuration. The IPDC Configuration screen reopens.


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Posted: Mon Oct 2 23:11:40 PDT 2000
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