Dial-peer matching issue

[martin.kohout]

Hi, I have 5 dial-peers with the same destination-pattern .T The only difference is preference option for VoIP dial-peer (0) compared to the others - POTS(2).

#sh dial-peer voice summary

dial-peer hunt 0

             AD                                    PRE PASS                OUT

TAG    TYPE  MIN  OPER PREFIX    DEST-PATTERN      FER THRU SESS-TARGET    STAT PORT

100    voip  up   up             .T                 0  syst sip-server

10     pots  up   up             .T                 2                      up   0/1/0

11     pots  up   up             .T                 2                      up   0/1/1

30     pots  up   up             .T                 2                      up   0/3/0

31     pots  up   up             .T                 2                      up   0/3/1

I would expect that all calls match the VoIP dial-peer as outbound. Also #sh dialplan number always shows me it in that way.

#sh dialplan number 31313131313 timeout
Macro Exp.: 31313131313

VoiceOverIpPeer100

(shortened..)

I thought there was a rule disabling to have inbound/outbound dial-peer same but even extended #sh dialplan dialpeer xxx number yyy timeout didn't prove the theory

#sh dialplan dialpeer 100 number 31313131313 timeout

Macro Exp.: 31313131313

VoiceOverIpPeer100

(shortened..)

Despite all I can see calls matching outbound POTS dial-peer:

#sh voice call status
CallID     CID  ccVdb      Port             DSP/Ch  Called #   Codec    Dial-peers
0xB757     666  0x480F152C 0/1/0.1          0/1:1  *1313131313 None      100/10

Can you please tell me why POTS is matched?

Thank you very much.

Martin

[Daniele Giordano]

Hi. For every calls there are always two call legs: an inbound call leg and an outbound call leg.

Every call leg uses a dial-peer.

You can find more details here:

Understanding Dial Peers and Call Legs on Cisco IOS Platforms

http://www.cisco.com/en/US/tech/tk652/tk90/technologies_tech_note09186a008010ae1c.shtml

Understanding Inbound and Outbound Dial Peers Matching on IOS Platforms

http://www.cisco.com/en/US/tech/tk652/tk90/technologies_tech_note09186a008010fed1.shtml

In your example you have an incoming voip call that uses the dial-peer 100 as incoming dp. So the dial-peer 100 cannot be used as an outgoing dp.

You must configure an incoming dp like this:

dial-peer voice 200 voip

description INCOMING_CALLS_from_VoIP_NET

incoming called-number .

modem passthrough nse codec g711alaw

dtmf-relay rtp-nte

codec g711alaw

fax rate disable

fax protocol pass-through g711alaw

no vad

No session target is necessary for incoming dp.

If you want establish a ip to ip call, evaluate the use of allow-connections command.

Regards.

[martin.kohout]

Hi Daniele,

thank you for your response. The allow-connection sip to sip command fixed my issue.

I also found (thanks to debug voip ccapi inout & signaling analyzer) that one dp can stand for both incoming dp & outgoing dp = no additional dp 200 is needed.

Regards,

Martin