Here’s the situation; one MT will be on a dynamic IP (to the internet), the other will have static.
I’m assuming I won’t be able to use IPSEC since I have a static ip address on one router.
Reading through the documentation it looks like using a combination of EoIP, L2TP it might work, since L2TP doesn’t seem to pass VOIP traffic and it looks like EoIP might (big assumption, can someone verify?).
Something like:
MT1->EoIP->L2TP_Client->Internet<-L2TP_Server<-EoIP<-MT2
I would love to know if someone has something like this working right now. Worse case, I’ll get a static ip for the second router, but would love to avoid that.
Thanks!
We’re using a straight l2tp tunnel and sip voip with no problems.
Sam
I suppose H.323 doesn’t traverse L2TP tunnels well?
There’s an Avaya one-X VOIP phone system going in. Once I figure out if it is SIP or H.323, maybe that will help.
[edit]
Apparently, it runs with SIP. changeip, thanks for the info!
Next question. These phones make initial contact by MAC address instead of IP.
For some reason I cannot MAC Ping devices on the other MT. Is there some sort of ARP related entry I missed when I setup L2TP?
Thanks!
You may want to try turning on “Proxy ARP”.
Craig
That was my first try. Unfortunately the l2tp virtual interface under /interface is read-only and when I tried to manually enter an ip to mac mapping in /ip arp, it said the l2tp interface does not support arp.
I’m coming to the conclusion that I’ll have to use EoIP over l2tp to make this work.
If they truly use MAC to begin the conversation (how, do they have a preconfigured list?) then you will need EoIP. Simply setup an EoIP interface on top of L2Tp and then bridge the LAN and EoIP interfaces together (on both sides). Possibly you can do a little more planning and make sure only those voip phones are on the same lan so that you are not sending all broadcasts across the wan … only Voip.
Sam
These phones are interesting in the setup. As far as I’ve been involved it looks like you enter the MAC address and extension of the other phones.
It doesn’t look like the phone broadcast, in fact they are connecting via TCP and UDP. I think they were made for DHCP oriented networks where IP addresses might change but the MAC addresses do not.
I’ll try EoIP today (I actually set it up already but did think to turn on proxy-arp, silly me)