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Configuring SGCP RSIP and AUEP Enhancements
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Table Of Contents

Configuring SGCP RSIP and AUEP Enhancements

Contents

Prerequisites for Configuring SGCP RSIP and AUEP Enhancements

Restrictions for Configuring SGCP RSIP and AUEP Enhancements

Information About Configuring SGCP RSIP and AUEP Enhancements

How to Configure SGCP RSIP and AUEP Enhancements

Configuring SGCP RSIP and AUEP Enhancements

Verifying SGCP RSIP Configuration

Configuration Examples for Configuring SGCP RSIP and AUEP Enhancements

Disconnected RSIP Messaging Example


Configuring SGCP RSIP and AUEP Enhancements

This section provides information on configuring the Simple Gateway Control Protocol (SGCP) Restart In Progress (RSIP) and Audit Endpoint (AUEP) Enhancements feature. The feature provides enhancements to SGCP for disconnected RSIP and audit endpoints requested by call agents.

Feature benefits include the following:

•Provides SGCP 1.5 gateways with the ability to synchronize endpoints with call agents after the disconnected procedure has occurred.

Note For more information about this and related Cisco IOS voice features, see the following:

•"Overview of MGCP and Related Protocols" on page 3

•Entire Cisco IOS Voice Configuration Library—including library preface and glossary, other feature documents, and troubleshooting documentation—at http://www.cisco.com/en/US/docs/ios/12_3/vvf_c/cisco_ios_voice_configuration_library_glossary/vcl.htm

Release
Modification

12.2(11)T

This feature was introduced on the following platforms: Cisco IAD2420 series, Cisco 2600 series, and Cisco MC3810.


Feature History for SGCP RSIP and AUEP Enhancements

Contents

•Prerequisites for Configuring SGCP RSIP and AUEP Enhancements

•Restrictions for Configuring SGCP RSIP and AUEP Enhancements

•Information About Configuring SGCP RSIP and AUEP Enhancements

•How to Configure SGCP RSIP and AUEP Enhancements

•Configuration Examples for Configuring SGCP RSIP and AUEP Enhancements

Prerequisites for Configuring SGCP RSIP and AUEP Enhancements

•Configure SGCP 1.5 on the gateway.

Restrictions for Configuring SGCP RSIP and AUEP Enhancements

•This feature applies only to SGCP 1.5 gateways.

•This feature does not apply to MGCP gateways.

Information About Configuring SGCP RSIP and AUEP Enhancements

The SGCP RSIP and AUEP Enhancements feature provides additional messaging capabilities that allow an endpoint on a Simple Gateway Control Protocol (SGCP) 1.5 gateway to synchronize with a call agent after the endpoint returns to service from the disconnected procedure. The additional messaging capabilities provide the following:

•A special disconnected Restart In Progress (RSIP) message that the gateway sends to the call agent as a result of the disconnected procedure.

•Additional fields in the Audit Endpoint (AUEP) command that the call agent uses to query the endpoint's status when contact is reestablished.

Media Gateway Control Protocol (MGCP) provides this ability automatically, but it must be explicitly configured for SGCP networks, as described in the "How to Configure SGCP RSIP and AUEP Enhancements" section.

An endpoint may lose contact with its call agent because the call agent is temporarily off line or because of faults in the network. When a gateway recognizes that an endpoint has lost its communication with the call agent, it initiates the disconnected procedure. The disconnected procedure requires the endpoint to send RSIPs to the call agent and also to guarantee that the first message that the call agent sees from the endpoint is an RSIP command. The endpoint continues to attempt to send RSIPs at the intervals prescribed by the disconnected procedure until an attempt is successful. The RSIP identifies itself as an RSIP that was generated from a disconnected procedure rather than from a restart. The following output is seen on the gateway: 

Disconnected RSIP sent from gateway


00:04:27:RSIP 7 ds1-3/2@RouterA SGCP 1.5

RM:disconnected

On receipt of a disconnected RSIP message, the call agent may decide to send an AUEP command to query the status of endpoints and synchronize endpoints. The SGCP RSIP and AUEP Enhancements feature provides the following additional fields of information in the AUEP:

•I—List of connection identifiers for current connections on the endpoint

•ES—Event state of the endpoint (off-hook or on-hook)

•RM—Restart method for the endpoint, which is one of the following:

–Graceful—Endpoints are being taken out of service after a delay; the call agent should not make new connections.

–Forced—Endpoints were abruptly taken out of service; connections were lost.

–Restart—Endpoints with no connections will be returned to service after a delay.

–Disconnected—Endpoints are being returned to service after the disconnected procedure.

How to Configure SGCP RSIP and AUEP Enhancements

See the following sections for configuration tasks for the SGCP RSIP and AUEP Enhancements feature. Each task in the list is identified as either required or optional.

•Configuring SGCP RSIP and AUEP Enhancements (required)

•Verifying SGCP RSIP Configuration (required)

Configuring SGCP RSIP and AUEP Enhancements

To configure enhanced restart and endpoint audit messaging capabilities on an SGCP gateway, use the following command in global configuration mode:

 
Command
Purpose
 

Router(config)# mgcp sgcp disconnect notify

Enables enhanced endpoint synchronization with a call agent after a disconnected procedure. The command is disabled by default.

Verifying SGCP RSIP Configuration

To verify your configuration, enter the show mgcp command. The following example shows that disconnected RSIP is enabled. 

Router# show mgcp


MGCP Admin State ACTIVE, Oper State ACTIVE - Cause Code NONE

MGCP call-agent:172.16.193.148 Initial protocol service is SGCP 1.5

MGCP block-newcalls DISABLED

MGCP send SGCP RSIP:forced/restart/graceful DISABLED, disconnected ENABLED

MGCP quarantine mode discard/step

MGCP quarantine of persistent events is ENABLED

MGCP dtmf-relay for VoIP disabled for all codec types

MGCP dtmf-relay for VoAAL2 disabled for all codec types

MGCP voip modem passthrough mode:NSE, codec:g711ulaw, redundancy:DISABLED,

MGCP voaal2 modem passthrough mode:NSE, codec:g711ulaw

MGCP TSE payload:0

MGCP Named Signalling Event (NSE) response timer:200

MGCP Network (IP/AAL2) Continuity Test timer:200

MGCP 'RTP stream loss' timer:5

MGCP request timeout 500

MGCP maximum exponential request timeout 4000

MGCP gateway port:2427, MGCP maximum waiting delay 3000

MGCP restart delay 0, MGCP vad DISABLED

MGCP rtrcac DISABLED

MGCP system resource check DISABLED

MGCP xpc-codec:DISABLED, MGCP persistent hookflash:DISABLED

MGCP persistent offhook:ENABLED, MGCP persistent onhook:DISABLED

MGCP piggyback msg ENABLED, MGCP endpoint offset DISABLED

MGCP simple-sdp DISABLED

MGCP undotted-notation DISABLED

MGCP codec type g711ulaw, MGCP packetization period 20

MGCP JB threshold lwm 30, MGCP JB threshold hwm 150

MGCP LAT threshold lmw 150, MGCP LAT threshold hwm 300

MGCP PL threshold lwm 1000, MGCP PL threshold hwm 10000

MGCP CL threshold lwm 1000, MGCP CL threshold hwm 10000

MGCP playout mode is adaptive 60, 4, 200 in msec

MGCP IP ToS low delay disabled, MGCP IP ToS high throughput disabled

MGCP IP ToS high reliability disabled, MGCP IP ToS low cost disabled

MGCP IP RTP precedence 5, MGCP signaling precedence:3

MGCP default package:line-package

MGCP supported packages:gm-package dtmf-package trunk-package line-package

			hs-package atm-package ms-package dt-package res-package

			mt-package

MGCP Digit Map matching order:shortest match

SGCP Digit Map matching order:always left-to-right

MGCP VoAAL2 ignore-lco-codec DISABLED

Configuration Examples for Configuring SGCP RSIP and AUEP Enhancements

This section contains the following example:

•Disconnected RSIP Messaging Example

Disconnected RSIP Messaging Example

The following example shows the configuration of disconnected RSIP messaging on a Cisco MC3810. 

version 12.2

no parser cache

no service pad

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname Router2

!

boot system tftp smithj/mc3810-r3jjl 172.16.206.10

logging buffered 2000000 debugging

no logging console

enable password lab

!

network-clock base-rate 56k

ip subnet-zero

!

no ip domain-lookup

ip host corona 172.16.206.10

ip host redlands 172.31.140.33

ip host rialto 172.16.193.147

!

voice service voip

 fax protocol t38 ls-redundancy 0 hs-redundancy 0

!

no voice confirmation-tone

voice-card 0

!

controller T1 0

 mode cas

 framing esf

 clock source internal

 linecode ami

 ds0-group 0 timeslots 1-24 type fxs-ground-start

!

interface Ethernet0

 ip address 172.16.193.162 255.255.255.0

 no ip mroute-cache

!

interface Serial0

 no ip address

 no ip route-cache

 no ip mroute-cache

 shutdown

!

interface Serial1

 no ip address

 no ip route-cache

 no ip mroute-cache

 shutdown

!

interface FR-ATM20

 no ip address

 shutdown

ip classless

ip route 10.0.0.0 10.0.0.0 172.16.193.1

ip route 172.16.0.0 255.255.0.0 172.16.193.1

no ip http server

!

!

call rsvp-sync

!

voice-port 0:0

!

voice-port 1/1

!

voice-port 1/2

 description package

!

mgcp

mgcp call-agent 172.16.193.148 service-type sgcp version 1.5

mgcp sgcp disconnect notify

!

mgcp profile default

!

dial-peer cor custom

!

dial-peer voice 1 pots

 application mgcpapp

 port 1/1

!

dial-peer voice 2 pots

 application mgcpapp

 port 1/2

!

dial-peer voice 3 pots

 application mgcpapp

 port 0:0

!

gatekeeper

 shutdown

!

line con 0

 exec-timeout 0 0

line aux 0

line 2 3

line vty 0 4

 exec-timeout 0 0

 password hemet

 login

!

end

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