On Monday, January 03, 2011 07:23:27 pm John Neiberger wrote: > So, I think some sort of layer two tunneling is in order. What are our > options if we want to make DeviceA and DeviceB think they're local to > each other and in the same LAN? I've heard of L2TP and of various MPLS > techniques that might solve this, but I've just never needed to use > them and really know nothing about how they're configured or if > they're even legitimate options.
At one point in time I had a similar need between two sites that were connected via a PoS OC3; I had two Catalyst 550x's (not 6500, but 5500 series; one a 5509 and one a 5505) with Sup3Gs and RSFCs available. I used the marginally documented 'bridged GRE' technique, since the RSFC doesn't do L2TPv3 either. Not sure if bridged GRE tunnels work with 6500 gear. But I successfully used the bridged GRE tunnel for a couple of years until the need for layer 2 transparency between the sites went away. I don't remember offhand the configure commands used..... but a quick search and I found http://www.net-gyver.com/?p=952 Note that that is not a supported feature, and IOS tells you so when you configure it. If nothing else it could be a stopgap while you figure out the permanent solution. What sort of linecard(s) are these routed interfaces on? I know that some linecards support features other linecards do not, and, in particular, if you're using old OSM GE WAN cards the GE-WAN interfaces can't do L2 features, but can do some MPLS things. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
