LLDP configuration for Polycom CX600 (lync edition) with XOS 15.6.3.1

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I was having a bear of a time getting our Polycom CX600 phones working with LLDP on our extreme switches, as the Vendor Specific DSCP tag 46 seems to be ignored by Lync Edition phones.

Switches are X460-48P and X450-48P-G2 switches.

LLDP configuration for the VOIP vlan is:

configure lldp port 1-48 advertise vendor-specific med capabilities
configure lldp port 1-48 advertise vendor-specific dot1 vlan-name vlan VOIP
configure lldp port 1-48 advertise vendor-specific med power-via-mdi
Configure lldp port 1-48 advertise system-capabilities
Configure lldp port 1-48 advertise vendor-specific dot1 port-protocol-vlan-id vlan VOIP
enable lldp ports 1-48

Hope this helps someone else.
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Ron Prague

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Posted 2 years ago

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Bharathiraja, Suresh, Employee

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Hi Ron,

Do you have any capture that shows Lync phones are ignoring the packets ?

Thanks,
Suresh.B
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Ron Prague

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Suresh, I'll take a look and see if I saved them, but there's a few other posts on the net around talking about issues with the lync edition polycom phones and dscp is always advertised with a value of 0 from them, this was consistent with what I was seeing as well.

If you look here: http://community.polycom.com/t5/VoIP/... you'll see the DSCP value is advertised as 0 from the phone in the original query.

My understanding is that the phone should advertise a specific DSCP value and that's used during the lldp configuration to assign the voice VLAN.