Hi James, You only advertise the L2TP endpoints for the local LNSs out of the specific hostlink. IE only advertise your Manchester endpoints out of your Manchester hostlink. If there is no route, then they can't establish a connection.
Also I believe its fairly typical to run the part of the network that interconnects with BT over the hostlinks in a separate routing instance. Regards, Dave On 13 November 2014 14:12, James Bensley <[email protected]> wrote: > Hi All, > > I received some very helpful answers last time I asked here so I'm > back again. A combination of the BT SIN docs and WBMC help desk have > filled in all various blanks for me: > > BGP MED is not used any further that the point of interconnect with > BTW for WBMC host links and AS-Paths greater than 1 aren't allowed. > So... > > Those of you with multiple host links to BTW, if you have a > north/south/east/west host link and LNS' in all those locations, how > do you ensure that BTW direct all your L2TP tunnels to your east LNS > via your east host link, and that they prefer your southen host link > to reach your southen LNS IP ranges? > > I'm trying to avoid the scenario of BT establishing L2TP tunnels to an > LNS in London via a host link in Manchester, with our LNS then sending > the return traffic out of our London host link because that is closer > to the London LNS. I'd like the traffic paths to be more predicatable > for failure sencarios and more liner to monitor etc etc. > > Cheers, > James. >
