My company need to interconnect 2 Sites both configured with multiple vlans. Each vlan on a site has a matching vlan in the other site (same subnetwork). We have already purchased a LL of 2 Mbps with X21/V11 interface between the 2 sites and I need to configure both routers that interconnect the 2 sites in such a way that :
- the WAN link behave like a LAN extension, in such a way that for example a flooding of arp broadcasts on a vlan would extend to the other site.
- there are a couple of vlans in one site that need to be translated with a different vlan-id in the other site, in such a way that for example a flooding of arp broadcasts in vlan 2 in Site 1 would flood in vlan 3 in Site 2.
I suggest the following suggestion, but can't do any test before the delivery of the line and the routers :
- Both routers interconnecting the 2 sites could be configured with as many 802.1Q subinterfaces as vlan-ids on the LAN side and as many tunnel virtual interfaces as vlan-ids on the WAN side. Then, configure bridging between each subinterface and tunnel interface using "bridge" command.
Is this solution acceptable, or is there a better practise (assuming that the LL is already purchased and cannot be replaced by an ethernet solution).
Thanks for your help