Table Of Contents

Cisco Unified Border Element Support for Configuring an Error Response Code upon an Out-of-Dialog OPTIONS Ping Failure

Prerequisites

Restrictions

Configuring an Error Response Code upon an Out-of-Dialog OPTIONS Ping Failure at the Global Level

Configuring an Error Response Code upon an Out-of-Dialog OPTIONS Ping Failure at the Dial Peer Level

Troubleshooting Tips

Cisco Unified Border Element Support for Configuring an Error Response Code upon an Out-of-Dialog OPTIONS Ping Failure

Cisco Unified Border Element (Cisco UBE) provides an option to configure the error response code when a dial peer is busied out because of an Out-of-Dialog OPTIONS ping failure.

The OPTIONS ping mechanism monitors the status of a remote Session Initiation Protocol (SIP) server, proxy or endpoints. Cisco UBE monitors these endpoints periodically. When there is no response from these monitored endpoints, the configured dial peer is busied out. If the dial-peer endpoint is busied out due to an OPTIONS ping failure, the call is passed on to the next dial-peer endpoint if an alternate dial peer is configured for the same destination. Otherwise the error response 404 is sent. This feature provides the option of configuring the error response code to reroute the call. Therefore when a dial peer is busied out due to the OPTIONS ping failure, the SIP error code configured in the inbound dial-peer is sent as a response.

To configure the SIP error code response, perform the following tasks:

•Configuring an Error Response Code upon an Out-of-Dialog OPTIONS Ping Failure at the Global Level (required)

•Configuring an Error Response Code upon an Out-of-Dialog OPTIONS Ping Failure at the Dial Peer Level (required)

•Troubleshooting Tips

Prerequisites

•The Cisco UBE Out-of-Dialog (OOD) OPTIONS Ping for Specified SIP Servers or Endpoints feature should be configured before configuring this error response code for a ping OPTIONS failure.

Cisco Unified Border Element

•Cisco IOS Release 15.1(1)T or a later release must be installed and running on your Cisco Unified Border Element.

Cisco Unified Border Element (Enterprise)

•Cisco IOS XE Release 3.1S or a later release must be installed and running on your Cisco ASR 1000 Series Router.

Restrictions

The error code configuration will not have any effect if it is configured on the outbound dial peer.

Configuring an Error Response Code upon an Out-of-Dialog OPTIONS Ping Failure at the Global Level

Table 1 describes the SIP error codes.

Table 1 SIP Error Codes 

Error Code Number	Description
400	Bad Request
401	Unauthorized
402	Payment Required
403	Forbidden
404	Not Found
408	Request Timed Out
416	Unsupported URI
480	Temporarily Unavailable
482	Loop Detected
484	Address Incomplete
486	Busy Here
487	Request Terminated
488	Not Acceptable Here
500-599	SIP 5xx—Server/Service Failure
500	Internal Server Error
502	Bad Gateway
503	Service Unavailable
600-699	SIP 6xx—Global Failure

To configure the error response code for the OPTIONS ping failure to support the Cisco Unified Border Element at the global level, perform the steps in this section.

SUMMARY STEPS

1. enable

2. configure terminal

3. voice service voip

4. sip

5. error-code-override options-keepalive failure sip-status-code-number

6. end

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: Router> enable	Enables privileged EXEC mode. •Enter your password if prompted.
Step 2	configure terminal Example: Router# configure terminal	Enters global configuration mode.
Step 3	voice service voip Example: Router(config)# voice service voip	Enters voice service configuration mode.
Step 4	sip Example: Router(conf-voi-serv)# sip	Enters voice service SIP configuration mode.
Step 5	error-code-override options-keepalive failure sip-status-code-number Example: Router(conf-serv-sip)# error-code-override options-keepalive failure 402	Configures the specified SIP error code number. •sip-status-code-number —SIP status code to be sent for an options keepalive failure. Range: 400 to 699. Default: 503. •Table 1 provides more details about these error codes.
Step 6	end Example: Router(conf-serv-sip)# end	Exits voice service SIP configuration mode and returns to privileged EXEC mode.

Configuring an Error Response Code upon an Out-of-Dialog OPTIONS Ping Failure at the Dial Peer Level

To configure the error response code for the OPTIONS ping failure to support the Cisco Unified Border Element at the dial-peer level, perform the steps in this section.

SUMMARY STEPS

1. enable

2. configure terminal

3. dial-peer voice voice-dial-peer-tag voip

4. voice-class sip error-code-override options-keepalive failure {sip-status-code-number | system}

5. end

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: Router> enable	Enables privileged EXEC mode. •Enter your password if prompted.
Step 2	configure terminal Example: Router# configure terminal	Enters global configuration mode.
Step 3	dial-peer voice voice-dial-peer-tag voip Example: Router(config)# dial-peer voice 234 voip	Enters dial peer voice configuration mode.
Step 4	voice-class sip error-code-error-override options-keepalive failure {sip-status-code-number | system} Example: Router(config-dial-peer)# voice-class sip error-code-override options-keepalive failure 500	Configures the specified SIP error code number. •sip-status-code-number —SIP status code to be sent for an options keepalive failure. Range: 400 to 699. Default: 503. •Table 1 provides more details about these error codes. Note If the system keyword is configured, the global level configuration will override the dial-peer configuration.
Step 5	end Example: Router(config-dial-peer)# end	Exits dial peer voice configuration mode and returns to privileged EXEC mode.

Troubleshooting Tips

The following debug commands display any error that occurs with the error code response:

•debug ccsip messages—shows SIP messages.

Router# debug ccsip messages

SIP Call messages tracing is enabled

•debug ccsip all—shows all SIP-related debugging.

Router# debug ccsip all

This may severely impact system performance. Continue? [confirm]

All SIP Call tracing is enabled