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Vendor class Identifier shows empty for polycom soundstation 550

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Vendor class Identifier shows empty for polycom soundstation 550



Dhcp-class-Identifier value comes as empty when we get the value from third party code bacbase, and found that TCPdump itself doesnot show the value for "Vendor class identifier" in DHCP Discover/Request packet.


The value comes below when it got selected from pcap file.



Please refer attched snapshot. is there any problem for this attribute to populate on polycom?

This DHCP value for the device used in Cisco product ISE.

Your earlier will be highly appreciated.





Polycom Employee & Community Manager

Re: Vendor class Identifier shows empty for polycom soundstation 550

Hello @Parimaladevi Vadivel,

welcome to the Polycom Community.

It is always useful to include the currently used SIP or UC Software version as issues experienced or a question asked may already be addressed in a newer release.

This also allows yourself and others to check against current software release notes, Administrator Guides or FAQ post’s.

The above is also stated in the "Must Read First" and is the absolute minimum requirement every new post should include. .

In addition providing us with this basic information gives Polycom an idea what Software Versions are used in the field and avoids wasting time trying to troubleshoot issues which have already been addressed.

The screenshot of the Wireshark shows that this unit is using UC Software 4.0.8.


I am not aware of any issues in this build but I recommend you use the latest 4.0.13 instead.


More details can be found:


Sep 13, 2016 Question:Do Polcyom Phones support the DHCP Option 60 Vendor Data Format?

Resolution: Please check => here <=

Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier

Polycom Global Services

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