10-12-2020 01:22 PM
I've got to extend our voice VLAN over a WAN backbone. One of the old documents (2013) says L2TP does not support CDP ,LLDP, STP, or VLAN trunking, unless you use a L3 switch.
My current design is:
A1 switch with VoIP access ports
A1 router
backbone network
A2 router
A2 switch
Phone.
Is it possible to have a L2TPv3 tunnel between A1 to A2 routers, and push the VoIP traffic from the A1 switch to the A2 phone? I am failing so far...is that because of the lack of CDP?
Thanks.
10-12-2020 01:49 PM
Hope the below example works for you : ( check the router requirement, you mentioned router, we guess all cisco devices here)
10-12-2020 02:38 PM
Hyperlink is broken, sorry. Do you know if VoIP can be carried over a L2TP tunnel? Thanks.
10-13-2020 12:30 AM
- Check if this guide is helpful :
M.
10-13-2020 06:00 AM
Marce1000. Per the link you sent me, it states:
Does tha mean I cannot run VoIP over a tunnel using routers? Do they need CDP/LLDP ?
Thanks.
10-13-2020 08:47 AM
Hello @jimmycher ,
I would suggest you to create a VOIP subnet on A2 site instead of attempting to extend the existing Voice VLAN over WAN.
CDP and LLDP are spoken between the IP phone and the connected switch port to allow the IP phone to identify itself and to get Voice Vlan info.
On A2 switch you need to define the voice VLAN on user ports in the same way you do on A1 switch.
The L2 transport service should be limited to VOIP packets and signaling.
Hope to help
Giuseppe
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