06-17-2011 08:38 AM
Hi,
I noticed that the SG300 series of switches do not support CDP. However, will these switches pass CDP packets onto an upstream device?
Thanks
06-17-2011 11:06 AM
Canadianicon25,
At the moment they will not pass the cdp packets.
There will be a firmware release soon that enables cdp and textview cli for these switches.
As a work around you can utilize lldp to push a vlan and qos to devices in your network.
06-17-2011 11:19 AM
without passing CDP packets how would IP phones communicate with the UC320 for registration and VLAN information in this scenario?
UC320 ---------SG300 switch---------SPA IP phone
any idea more specifically when the firmware update will become available?
06-17-2011 11:26 AM
The UC320 does not depend on CDP, the end device is a SIP registered device
The swicth will work without the firmware upgrade in the scenario you described
I hope this helps
06-17-2011 11:36 AM
According to the UC320 documentation (pg. 17 of the design guide) if using a switch with the 320 it must allow CDP packets to pass through. I believe the 320 is using CDP for delivering VLAN information to the phones as well as autodiscovery of the 320 ( which cannot be disabled) and for registation of the IP phone with the 320.
If anyone knows where I could find more information about when the firmware update is supposed to be released that would be most appreciated!
06-20-2011 05:12 PM
Hi canadianicon25,
As David has pointed out, there should be a firmware release that will enable CDP on the SG300 series in the very near future, however, you can still use the SG300 series switches with a UC320W. Please follow the setup guide found on the following link to setup your SG300 switch for use in UC320W environment. Partner login is required to view the document.
http://tools.cisco.com/s2slv2/ViewDocument?docName=EXT-AS-370390
Cheers,
Julio
06-20-2011 10:04 PM
The firmware supporting CDP, CLI, Smartports, and numerous other features has now been released. You can find the details here:
https://supportforums.cisco.com/docs/DOC-17092
Ivor
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