Dial Peers for Internal Calls
From Webex Calling to CUCM
The Voice Class Tenant 200 is a trunk to process inbound and outbound calls from and to Webex Calling and this will be associated to the Dial Peer Voice 201 with voice-class sip tenant 200 command. Specify the webex servers using the sip-server command. We will use the session target sip-server command under each outgoing dial peers to Webex Calling.
voice class tenant 200
registrar dns:40462196.cisco-bcld.com scheme sips expires 240 refresh-ratio 50 tcp tls
credentials number test8789_LGU username test3350_LGU password 0 bjljJ2VQji realm
BroadWorks
authentication username test3350_LGU password 0 bjljJ2VQji realm BroadWorks
authentication username test3350_LGU password 0 bjljJ2VQji realm 40462196.cisco-bcld.com
no remote-party-id
sip-server dns:40462196.cisco-bcld.com
connection-reuse
srtp-crypto 200
session transport tcp tls
url sips
error-passthru
asserted-id pai
bind control source-interface GigabitEthernet1
bind media source-interface GigabitEthernet1
no pass-thru content custom-sdp
sip-profiles 200
outbound-proxy dns:la01.sipconnect-us10.cisco-bcld.com
privacy-policy passthru
We need to define the pattern to uniquely identify the specific organization to be matched by the incoming dial peer in the Local Gateway from Webex Calling.
Incoming calls from Webex Calling are identified with voice class URI. The SIP INVITE Request-URI sent from the Webex Calling cloud to the local gateway contains a dtg parameter that is generated in Control Hub.
voice class uri WBX-URI sip
pattern dtg=test3350.lgu
Configure the Dial Peer Group 300 to point to outbound Dial Peer Voice 301. The purpose is to route incoming calls matching the inbound Dial Peer 201 from Webex Calling to Dial Peer 301.
voice class dpg 300
description Incoming calls webex (Dial Peer 201) to CUCM (Dial Peer 301)
dial-peer 301 preference 1
The call from Webex Calling uses the dial peer 201 because there is a match using the incoming uri request WBX-URI command, After matching the incoming calls from Webex Calling, they are routed to the dial peer 301 because the destination dpg 300 command.
dial-peer voice 201 voip
description Inbound/Outbound to and from Webex Calling
max-conn 250
destination-pattern BAD.BAD
session protocol sipv2
session target sip-server
destination dpg 300
incoming uri request WBX-URI
voice-class codec 99
voice-class stun-usage 200
no voice-class sip localhost
voice-class sip tenant 200
dtmf-relay rtp-nte
srtp
no vad
The voice class tenant 100 is a trunk to the CUCM. It will be applied on all Outbound dial peers facing the CUCM.
voice class tenant 100
session transport udp
url sip
error-passthru
bind control source-interface GigabitEthernet2
bind media source-interface GigabitEthernet2
no pass-thru content custom-sdp
Define the CUCM as the target for the dial peer 301. In order to do that, you need to create voice class server group with all the IP addresses of the CUCM nodes with the callmanager service enabled.
voice class server-group 301
ipv4 10.1.5.15
Because the Dial Peer Group 300 configured previously points to Dial Peer Voice 301 with dial-peer 301 preference 1 command the call is routed to dial peer 301. This Dial Peer points to IP of CUCM using the voice class server-group command.
dial-peer voice 301 voip
description Outgoing dial-peer to CUCM
destination-pattern BAD.BAD
session protocol sipv2
session server-group 301
voice-class codec 99
dtmf-relay rtp-nte
voice-class sip tenant 100
no vad
From CUCM to Webex Calling
Configure the Voice Class Tenant 300 that will be applied to Inbound dial peer 300 from the CUCM.
It will be associated to Dial Peer Voice 300 using the voice-class sip tenant 300 command.
voice class tenant 300
bind control source-interface GigabitEthernet2
bind media source-interface GigabitEthernet2
no pass-thru content custom-sdp
Configure the voice class URI to match the CUCM IP address.
voice class uri 300 sip
host ipv4:10.1.5.15
Define the dial peer group 200, the purpose is to route the calls to dial peer 201.
Configure the Dial Peer Group 200 to point to outbound Dial Peer Voice 201. The purpose is to route incoming calls matching the inbound Dial Peer 300 from Webex Calling to Dial Peer 201.
voice class dpg 200
description Incoming CUCM (Dial Peer 300) to Webex Calling (Dial Peer 201)
dial-peer 201 preference 1
The dial peer 300 matches the CUCM IP address based on the voice class URI using the incoming uri via 300 command, then the call is routed to the dial peer group 200 because the destination dpg 200 command.
dial-peer voice 300 voip
description Incoming dial-peer from Unified CM to Webex
session protocol sipv2
destination dpg 200
incoming uri via 300
voice-class codec 99
dtmf-relay rtp-nte
voice-class sip tenant 300
Because the Dial Peer Group 200 points to Dial Peer Voice 201, the call is routed to dial peer 201.
The dial peer 201 configured previously for inbound calls to Webex Calling will be used as the outbound Dial Peerfor incoming calls from PSTN.
Because the Dial Peer Group 200 points to Dial Peer Voice 201 the call is routed to dial peer 201, the session target sip-server command under the Dial Peer 201 instructs the CUBE to use the sip-server that points to WebexServers configured previously in voice class tenant 200 to send outgoing calls to Webex Calling.
dial-peer voice 201 voip
description Inbound/Outbound Webex Calling
max-conn 250
destination-pattern BAD.BAD
session protocol sipv2
session target sip-server
destination dpg 300
incoming uri request WBX-URI
voice-class codec 99
voice-class stun-usage 200
no voice-class sip localhost
voice-class sip tenant 200
dtmf-relay rtp-nte
srtp
no vad
Dial Peers for PSTN Calls
Configure the Voice Class Tenant 200. This is a trunk to process inbound and outbound calls from and to Webex Calling and this will be associated to the Dial Peer Voice 2001 with voice-class sip tenant 200 command. The Dial Peer Voice 2001 will be used for inbound and outbound to and from Webex Calling. Specify the webex servers using the sip-server command. We will use the session target sip-server command under each outgoing dial peers to Webex Calling.
voice class tenant 200
registrar dns:40462196.cisco-bcld.com scheme sips expires 240 refresh-ratio 50 tcp tls
credentials number test8789_LGU username test3350_LGU password 0 bjljJ2VQji realm
BroadWorks
authentication username test3350_LGU password 0 bjljJ2VQji realm BroadWorks
authentication username test3350_LGU password 0 bjljJ2VQji realm 40462196.cisco-bcld.com
no remote-party-id
sip-server dns:40462196.cisco-bcld.com
connection-reuse
srtp-crypto 200
session transport tcp tls
url sips
error-passthru
asserted-id pai
bind control source-interface GigabitEthernet1
bind media source-interface GigabitEthernet1
no pass-thru content custom-sdp
sip-profiles 200
outbound-proxy dns:la01.sipconnect-us10.cisco-bcld.com
privacy-policy passthru
Configure the voice class tenant 400, this is a trunk to the ITSP. It will be applied on Outbound Dial Peer 101 facing the PSTN.
It will be associated to the inbound Dial Peer Voice 101 using the voice-class sip tenant 400 command.
voice class tenant 400
session transport udp
url sip
error-passthru
bind control source-interface GigabitEthernet2
bind media source-interface GigabitEthernet2
Configure the Voice Class Tenant 500 that will be applied on all Inbound dial peers from the PSTN.
It will be associated to the inbound Dial Peer Voice 100 using the voice-class sip tenant 500 command.
voice class tenant 500
bind control source-interface GigabitEthernet2
bind media source-interface GigabitEthernet2
no pass-thru content custom-sdp
Configure the voice class URI to match the ITSP PSTN IP address.
voice class uri 100 sip
host ipv4:198.12.13.2
We need to define the pattern to uniquely identify the specific organization to be matched by the incoming dial peer in the Local Gateway from Webex Calling.
Incoming calls from Webex Calling are identified with voice class URI. The SIP INVITE Request-URI sent from the Webex Calling cloud to the local gateway contains a dtg parameter that is generated in Control Hub.
voice class uri 200 sip
pattern dtg=test3350.lgu
Configure a Dial Peer Group for calls from Webex to PSTN.
voice class dpg 100
description Incoming WBX (Dial Peer 200) to PSTN (Dial Peer 101)
dial-peer 101 preference 1
Configure a Dial Peer Group for calls from PSTN to Webex.
Configure the Dial Peer Group 400 to point to outbound Dial Peer Voice 2001. The purpose is to route incoming calls matching the inbound Dial Peer 100 from ITSP PSTN to Dial Peer 2001.
voice class dpg 400
description Incoming PSTN (Dial Peer 100) to WBX (Dial Peer 201)
dial-peer 2001 preference 1
Configure an outbound Dial Peer to PSTN.
Because the Dial Peer Group 100 configured previously points to Dial Peer Voice 101 with dial-peer 101 preference 1 command the call is routed to dial peer 2001. This Dial Peer points to IP of ITSP using the session target ipv4 :198.18.133.3 command.
dial-peer voice 101 voip
description Outgoing dial-peer to PSTN
destination-pattern BAD.BAD
session protocol sipv2
session target ipv4: 198.12.13.2
voice-class codec 99
voice-class sip tenant 400
dtmf-relay rtp-nte
no vad
Configure an outbound Dial Peer to Webex Calling.
dial-peer voice 2001 voip
description Inbound/Outbound to and from Webex Calling
destination-pattern BAD.BAD
session protocol sipv2
session target sip-server
voice-class codec 99
voice-class stun-usage 200
no voice-class sip localhost
voice-class sip tenant 200
dtmf-relay rtp-nte
srtp
no vad
Configure inbound Dial Peer for Incoming Calls from PSTN
Configure inbound dial peer 100 matches the ITSP IP address based on the voice class URI 100 using the incoming uri via 100 command, then the incoming call is routed to the dial peer group 400 because the destination dpg 400 command.
dial-peer voice 100 voip
description Incoming dial-peer from PSTN
session protocol sipv2
destination dpg 400
incoming uri via 100
voice-class codec 99
voice-class sip tenant 500
dtmf-relay rtp-nte
no vad
Configure inbound Dial Peer for Incoming Calls from Webex Calling
Because the Dial Peer Group 100 confgured previously points to Dial Peer Voice 101, the call is routed to the outgoing dial peer 101.
The dial peer 2001 configured previously for outbound calls to Webex Calling will be used as the inbound Dial Peerfor incoming calls from Webex Calling.
After matching the incoming calls from Webex Calling, they are routed to the dial peer 2001 because the destination dpg 400 command.
dial-peer voice 2001 voip
description Inbound/Outbound to and from Webex Calling
destination-pattern BAD.BAD
session protocol sipv2
session target sip-server
voice-class codec 99
voice-class stun-usage 200
no voice-class sip localhost
voice-class sip tenant 200
dtmf-relay rtp-nte
destination dpg 100
incoming uri request 200
srtp
no vad
Demystify and Simplify 