extend vlan in remote site

hmc2500 · ‎02-19-2019

Hi, we have a need to extend vlans from one site to another site. We are moving to another location and have to run both sites simultaneously. They do not want to have to re configure ip addresses which would be very tedious. We are using layer 3 core switches to connect the sites through metro ethernet WAN connections and use OSPF as the routing protocol for the l3 switches. We have configured SVI's for the internal LAN's in each of the sites. We have no other routers in these sites, only switches (connected with L2 trunk ports). What is the best way to extend vlans from one site into the other site in this case? I was thinking about L2tpv3 but I cannot configure xconnect on the vlan SVI interface.

luis_cordova · ‎02-19-2019

Hi @hmc2500,

Excuse my ignorance about metro ethernet WAN, but, if you have a connection like the one shown in the image, would not the VTP protocol work for that purpose?

Regards

hmc2500 · ‎02-20-2019

No, the L3 switches are configured with l3 ports and OSPF over the metro ethernet links. I guess if OSPF was not configured it would be easy as Metro Ethernet is layer2. Not sure if that was clear or not.

Jon Marshall · ‎02-20-2019

You could change the connections to trunks (assuming they are supported) instead of L3 ports and then you could do both ie. route vlans you do not need to extend between sites and add vlans to trunks for those you do.

Jon