Yes. 6rd is stateless, anycast address can be used for BR loadbalancing. But as stated in draft-zhang-behave-nat64-load-balancing, using anycast to do the loadbalancing for the stateless transition technology has the following drawbacks. Anyway, anycast address of BR can still be used by using a FQDN of the B4 in the DHCPv4 option. The same address(i.e. the anycast address) is returned when the DNS server receives the DNS resolution requests from CEs. FQDN solotion is more flexible.
The efficiency of this mode largely depends on the underlying topology (e.g., location of NAT64 devices) and routing engineering policies. Moreover, a stateless device may be overloaded if the routing is not appropriately tuned and/or if the stateless devices are not appropriately dimensioned. Best Regards, Zhenqiang Li 2011-07-04 ----- Original Message ----- From: Washam Fan Sent: 2011-07-03 12:02:07 To: [email protected] CC: [email protected] Subject: Re: Re: [Softwires] Why not use AFTR IPv6 address for the new DHCPv6 option? Hi Zhenqiang, 6rd is stateless, so anycast address might be used for BR loadbalancing. I guess, that might be the reason why IP literal is prefered over fqdn for 6rd case. THanks, washam _______________________________________________ Softwires mailing list [email protected] https://www.ietf.org/mailman/listinfo/softwires
