Table of Contents

Understanding MGCP
Configuration Tasks for MGCP

Configuring MGCP IP Addresses
Configuring MGCP Core Settings
Viewing MGCP Message Statistics

Understanding Sessions
Configuration Tasks for Sessions

Configuring Session Sets

Viewing Session Set Information
Adding a Session Set
Deleting a Session Set

Configuring Session Groups

Viewing Session Group Information
Adding a Session Group
Deleting a Session Group

Configuring Session Managers

Viewing Session Manager Information
Adding a Session Manager
Deleting a Session Manager
Viewing Session Manager Counters

Understanding ISDN D-Channels Usage
Configuration Tasks for D-Channels

Adding a MACSAP Profile
Adding a DLSAP Profile
Deleting a Profile
Adding D-Channels
Deleting a D-Channel
Viewing D-Channel Counters
Viewing DLSAP Counters
Viewing MACSAP Counters
Viewing LAPD Parameters

Call Control Interface Configuration

The Cisco MGX 8260 works in conjunction with Media Gateway Controller (MGC) servers 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 17-1).

Only the IP layer requires configuration. The following diagram shows how to configure MGCP IP addresses in a fully-redundant system (see Figure 17-2).

Configuration Tasks for MGCP

To configure MGCP, you perform the following tasks:

• Set IP addresses and ports

• Configure MGCP core settings

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 2 Click MGCP.

Step 3 Click Default.

The MGCP Default Setting screen opens.

Step 4 Specify the MGCP parameters:

Parameter	Description
Primary MGCP Address 1	The default domain name or 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 default domain name or 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 default domain name or 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 default domain name or 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.
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
Time Stamp	The time stamp.
Con. Status Time Stamp	The time the connection status last changed.
Local Address 1	The domain name or 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 domain name or 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.
Domain Name	The domain name of the MGX 8260. Value: 1-64 characters.

Step 5 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 IP addresses, follow these steps:

Step 2 Click MGCP.

Step 3 Click Core.

The MGCP Core Setting screen opens.

Viewing MGCP Message Statistics

To view MGCP message statistics, follow these steps:

Step 2 Click MGCP.

Step 3 Click Message Stats.

The system displays the statistics for MGCP messages.

Step 4 Specify the MGCP core parameters:

Parameter	Description
Messages Bad Version	The total number of incoming messages delivered to the protocol entity that were for an unsupported protocol version.
Request Retries	The maximum number of retries for a request that times out.
Restart InProg MWD	The maximum waiting delay, in milliseconds, before the Media Gateway interface sends the Restart In Progress message to the Media Gateway Controller.
Restart Delay	This object specifies the restart delay for the restart process. Use -1 to specify an infinite delay.
Request TimeOut	The time in milliseconds before retransmitting an unacknowledged message.
UnRecognized Packets	The number of unrecognized packets.
(Set) 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
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 Operational Status.

Step 6 Select Up for the Admin. Status Setting.

Step 7 Click Set New Status to change the value and return to the MGCP Core Setting screen.

Step 8 Click Modify. The system configures the MGCP core settings.

Understanding Sessions

The session manager organizes individual sessions into groups and sets (see Figure 17-3).

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 17-4).

Configuration Tasks for Sessions

To configure MGCP, you perform the following tasks:

• Add session sets

• Add session groups

• Add session managers

Configuring Session Sets

You can view and set session sets.

Viewing Session Set Information

To view session set status, follow these steps:

Step 2 Click Session.

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 faultTolerent
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 2 Click Session.

Step 3 Click Set.

The Session Set screen opens.

Step 4 Click the "+" icon.

TheAdd 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 2 Click Session.

Step 3 Click Set.

The Session Set screen opens.

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

Configuring Session Groups

You can view and add session groups.

Viewing Session Group Information

To view session set status, follow these steps:

Step 2 Click Session.

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 2 Click Session.

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
Set Index	The index number of the set to which this group belongs.
Group Index	A group number for the new group.

Step 6 Click Add.

Deleting a Session Group

To delete a session group, follow these steps:

Step 2 Click Session.

Step 3 Click Group.

The Session Group screen opens.

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

Configuring Session Managers

You can view and add session managers.

Viewing Session Manager Information

To view session manager status, follow these steps:

Step 2 Click Session.

Step 3 Click Manager.

The Session Manager screen opens.

Step 4 View the session manager 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 manager is a member.
Sess. Index	The session manager number.
Priority	The session manager connection priority.
State	The session manager state: open openWait openXfer close closeWait userClose autoReset
InUse State	The use state of the session manager: 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 Manager

To add a session manager connection, follow these steps:

Step 2 Click Session.

Step 3 Click Manager.

The Session Manager screen opens.

Step 4 Click the "+" icon.

The Add Session Manager form opens.

Step 5 Configure the session connection parameters.

Parameter	Description
Priority	The session manager connection 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. The Remote Address must be on the same subnet as the Local Address.

Step 6 Click Add.

Deleting a Session Manager

To delete a session manager, follow these steps:

Step 2 Click Session.

Step 3 Click Manager.

The Session Manager screen opens.

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

Viewing Session Manager Counters

To view session manager counters, follow these steps:

Step 2 Click Session.

Step 3 Click Manager.

The Session Manager 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 17-5).

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 17-6).

Configuration Tasks for D-Channels

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

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 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.
Interface	The type of profile.
Link Arbitration	The link setup arbitration scheme: passive or active.
LAPD Type	The LAPD interface type.
Max Outstanding Frames	The maximum number of sequentially numbered I-frames that may be outstanding.
Timer Q 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.
Timer Q 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.
Connection Timer	The connection timer.
t201 Timer	The minimum time between transmissions of TEI Identity check messages.
t202 Timer	The minimum time between transmissions of TEI Identity check messages.
TEI Check Timer	The TEI check timer. The value 1025 means the TEI Check Timer is disabled.
N202	Minimum time between transmissions of TEI Identity check messages.
Lowest Auto TEI	The allocated TEI value. When configured for Automatic TEI Assignment, ASP can allocate TEIs greater than or equal to Lowest Automatic TEI.
Keep L1 Up	The state of the Keep MAC Up All The Time flag.

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 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.
Frame Length	The frame length, which is the maximum number of octets in an information field.
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).
Retrans. Count	The maximum number of retransmissions of a frame.
Congestion Timer	The time after which DLCs are dropped during periods of network congestion, in seconds.
t200 Timer	The wait time before frame transmission may be initiated, in seconds.
t203 Timer	The maximum time allowed without frames being exchanged, in seconds.
Modulus	Each I-frame is sequentially numbered and may have values 0 through (N-1) where N is this modulus.
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
Max DLCs	The maximum number of DLCs for this DLSAP.
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 D-channel is added, 4 TEIs starting at 14 -1 are preconfigured.

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 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 you action.

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 2 Click ISDN.

Step 3 Click DChan Config.

The DChan Config screen opens.

Step 4 Click the "+" icon.

The Add Dlsap Profile form opens.

Step 5 Specify the D-Channel parameters.

Parameter	Description
Slot	The slot number for this D-Channel
Line	The line number for this D-Channel.
DlSap Profile Number	The number of the profile that defines the DlSap settings.
DlSap Index	The instance number of a DlSap profile. The profile defines a template for the configuration; the DlSap index is created from the template.
MacSap Profile Number	The number of the profile that defines the MacSap settings.
MacSap Index	The instance number of a MacSap profile. The profile defines a template for the configuration; the MacSap index is created from the template.

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

Deleting a D-Channel

To delete a D-Channel, follow these steps:

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 you action.

Viewing D-Channel Counters

To view D-Channel counters, follow these steps:

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 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 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.

Viewing LAPD Parameters

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

To view LAPD status, follow these steps:

Step 2 Click Session.

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.

Posted: Thu Mar 30 20:27:27 PST 2000
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