Enable VCS endpoints like C60 and XMP to use SRV

[khoabui76]

Does anyone has instruction or can point me to a document that explains how to configure VCS endpoints to use SRV records.  i configured SRV in DNS to support sip_tcp, sips_tls and sip_tls on port 5061 and configured SIP on endpoints to use URI for registration but the VCS-C never received a SIP registration.  I ran wireshark on DNS server and no query related to SIP URI from endpoints.

[gubadman]

As log as they have recent firmware and a DNS Server datafilled they should look automatically. SRV records should be:

_sips._tcp. for SIP TLS
_sip._tcp. for SIP TCP

Thanks,
Guy

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[khoabui76]

how recent firmware? one of the test endpoint XMP is running F9.1 NTSC and the C60 is TC5.1.0.280662.  My Movi client was successfully registered using SRV SIPS. thanks

[Martin Koch]

These software versons should work ok DNS SRV wise

(though you could upgrade to F9.3 and TC6 (or at least TC5.1.6), as some other bugs are fixed (check the releasenotes for more info).

Could you post your exact DNS config and what you have set up on the endpoints.

We are using SRV and it works fine.

If its a public resolvable domain, feel free to share it with us (or me via PM),

I could look it up and check it its ok.

Maybe your endpoints do not use this specific dns server.

You can also log in with ssh as root on the c-series endpoints and run a

tcpdump -nlvvs0 port 53

or use a monitor port.

Maybe you have set a wrong dns server, the dns entries itself are wrong or you have configured the endpoint wrong

or something else :-)

[khoabui76]

I spoke to vCS Support engineer last night and they told me only VCS-C will perform SRV and not the endpoint. endpoint must specify a SIP proxy to register. I don't specify a SIP proxy for movi and it works. I specified a Dns server and SIP URI in the endpoints and ran a wire shark on DNs server and never saw the SrV query coming from the endpoint.

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[gubadman]

That is not true. The endpoints do perform DNS SRV record look ups - it is all we datafill ours with, and we have EX60/90, MX200/300, SX20 and other C-Series endpoints along with some e20 and MXP.

[khoabui76]

THanks for comfirmation.  I specified the following for the C60 series:

Network 1:

DNS: Domain name : vcs.test.net

Server 1 Address: 10.40.50.12

Sip Profile 1:

Defaulttransport : Auto

Displayname : c60

Outbound: Off

TLS Verify: OFf

Type: Standard

URI 1: c60@vcs.test.net

nothing for Authentication 1 and Proxy 1

on the VCS-C I allows registration for anything starting with C60*

Please let me know if I am missing anything. Thanks

[gubadman]

DNS domain name should be the DNS suffix for the device. eg. cisco.com

DNS server 1 address, the DNS server e.g. 8.8.8.8

SIP profile 1 proxy 1 is where the SRV Cluster FQDN goes. eg. myvcs.cisco.com

then the endpoint will do a DNS SRV lookup for _sips._tcp.myvcs.cisco.com

Thanks,

Guy

[khoabui76]

great. It works now.  so what missing is the domain in the SIP Proxy 1.  I though just specify the SIP URI is enough.  Thanks.