Tina, > Consider an operator facing a high subscriber growth rate. As a > result of this growth rate, the operator faces pressure on its stock > of available public IPv4 addresses. For this reason, the operator is > motivated to offer IPv6 access as quickly as possible. > > The backbone network will be the first part of the operator's network > to support IPv6. The metro network is not so easily upgraded to > support IPv6 since many devices need to be modified and there may be > some impact to existing services. Thus any means of providing IPv6 > access has to minimize the changes required to devices in the metro > network.
what is it that makes existing softwires mesh solutions unsuitable for crossing the IPv4 only metro network? I'm thinking specifically on 6PE or BGP tunnels. cheers, Ole > > In contrast to the situation described for basic 6rd [ > RFC5569 > ], the > operator is assumed to be unable to manage IP devices on the customer > premises. As a result, the operator cannot assume that any of these > devices are capable of supporting 6rd. > > > If the customer equipment is in bridged mode and IPv6 is deployed to > sites via a Service Provider's (SP's) IPv4 network, the IPv6-only > host needs a IPv6 address to visit the IPv6 service. In this > scenario, 6to4 or 6RD can be used. However, each IPv6-only host may > need one corresponding IPv4 address when using 6to4 or 6RD, which > brings great address pressure to the operators. > > > If the customer equipment is in routing mode > , the operator has an > opportunity to avoid assigning IPv4 addresses to sites running IPv6 > only. Some other means is available for routing IPv6 traffic through > the IPv4 network to that site. > > > This draft talks about "Some other means". > > B. R. > Tina > http://tinatsou.weebly.com > > > > _______________________________________________ > Softwires mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/softwires _______________________________________________ Softwires mailing list [email protected] https://www.ietf.org/mailman/listinfo/softwires
