SPA5xx IP phone provisioning (SPCP detection)

[Attila Horvath]

Hi, 

We need to provision hundred of SPA5xx phones to a non-cisco softswitch via SIP protocol,

in hard Cisco Callmanager enviroment (distributed, with several Callmanager in LAN).

Because we want zero-touch installation, we need to ensure that the phones will NOT FIND the Callmanager via SPCP, 

based on our plans it will find a SIP server via option 66 tftp server IP.

As by default SPCP is enabled, the wireshark traces shows me the factory-default phones searches the SEP** and XmlDefault*** files in the subnet.

But one of traces show the phones find these files at Default gateway IP, other traces shows the phone tried to access the DNS server ip , and so on.

Anyone knows the exact protocol? What IP's will these zero-configuration phones be search after boot, with or without option 66 set?

Tried to find an SPCP RFC, but not found.

Any tips are welcome ;)

Attila

[Dan Lukes · Accepted solution]

Unfortunately, the switches are considered network masters. Phone will search for Cisco's call managers (TFTP to default gateway and multicast "SPCP Token Request" discovery) as well as provisioning servers (specified by DHCP options). It will connect to any server responding to their call.

As switches are masters, they must not supply configuration to the phone they are not willing to serve. Phone is not in charge to decide by self. As long as you have CCM with "auto-registration" turned on you should expect the phone will be registered to CCM.

SPCP is proprietary protocol, thus no RFC.