05-02-2014 06:33 AM - edited 03-16-2019 10:39 PM
I am struggling with an issue here for quite some time now. I have a 3750X switch with LLDP configured to send a network policy to advertise a voice vlan to IP phones. However on some ports I cant get it to send out any LLDP packets, so the connected Phone does not end up in the voice VLAN.
This is my config:
!
Vlan 1130
Name SER-BB-VoIP
!
lldp run
!
network-policy profile 1
voice vlan 1130
!
interface range gi1/0/1-10,gi1/0/12,gi1/0/14-18,gi1/0/20-21, gi1/0/23-27
auto qos voip trust
mls qos trust dscp
network-policy 1
I have tried shutting and no shutting the port (also waiting for the holdtimer of 120 seconds to time out). Also adjusting the lldp timer to 5 seconds. Clearing the LLDP table. Changing the access vlan on the port. Nothing seems to help.
In my wireshark traces I see that when the switchport comes up, the switch immediately starts sending lldp messages and advertising the network policy attribute with the correct VLAN for all working phones. For the none working phones I see only the Phone sending packets and not the switch.
Any suggestions? Thanks
05-02-2014 07:09 AM
Add lldp transmit and receive on the interface:
Switch(config-if)#lldp transmit !--- Enable the interface to receive LLDP. Switch(config-if)#lldp receive !--- Return to privileged EXEC mode. Switch(config-if)#end
Regards.
05-02-2014 07:18 AM
Hi Daniele,
Thanks for your reply.
That is enabled by default. I added it anyway, but it does not seem to help.
regards
05-02-2014 08:58 AM
Hi. Are the non working phones connected to one of these ports: interface range gi1/0/1-10,gi1/0/12,gi1/0/14-18,gi1/0/20-21, gi1/0/23-27?
What IOS is running?
Regards.
05-06-2014 02:11 AM
Hi Daniele,
The problem occured om port gi1/0/21 and later on 1/0/19 (which I enabled for lldp en auto qos voip at the time).
The software I'm running is 15.0(2)SE2.
regards Sebastian
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