|I suspect the biggest issue you're having is your lack of understanding of the technologies you're attempting to use. I'm not saying this to be rude or insulting. I'm just calling it as I see it. From your own comments it's plain you're struggling with this intersite connection. |
all vlan tagging is dropped when it hits the router.
hence my statement to spend some time understanding the differences between routing and vlans.
And hence my statement about the provider not doing tagging across the WAN link. Both wanderer and I actually do know what we're talking about and actually have some pretty good experience with this. As he stated, he has 9 geographical locations to administer. I have 4, two of which have multiple (MAN) sites.
the question is possible to make it happen to use VLAN in branch A extend to branch B.
Again, not possible unless your provider allows you to carry VLAN tags across the WAN which as I said, is not available (in my own experience) by default. If it is available, it's only so if you pay them more on a monthly basis. I suppose it is possible your provider allows VLAN tagging across their external links but I can tell you from my own experience, neither of the two separate providers we are presently using does. Since they can make more money off us by charging us for this (like the charge more for a full-duplex link as compared to a half-duplex) then I suspect yours will be like ours and allow it only for a jacked up fee.
Since you appear to be using the same subnet in both locations, all you need is an encrypted VPN tunnel between the two. Before you tell me again you can't I'm telling you yes, you can establish an encrypted VPN tunnel over an MPLS link.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.