Hi list, Does anyone know what tricks, if any, the major 6RD deployments (AT&T, Free, Swisscom, others?) are using to alleviate any problems stemming from the reduced IPv6 MTU? Some possibilities that come to mind are:
* Having the 6RD CPE lower the TCP MSS value of SYN packets as they enter/exit the tunnel device * Having the 6RD BR lower the TCP MSS value in the same way as above * Having the 6RD CPE advertise a lowered MTU to the LAN in RA Options * Several (or all) of the above in combination Also, given that some ISPs offer [only] Layer-2 service and expect/allow their customers to bring their own Layer-3 home gateway if they want one, I would find it interesting to learn if any of the most common off-the-shelf home gateway products (that enable 6RD by default) also implement any such tricks by default or not. Tore
