On 16 jul 2008, at 1:54, Hemant Singh (shemant) wrote:
RPF (Reverse Path Forwarding) will fail and if RPF fails for a router,due to security concerns, the router should drop the incoming packet. If the WAN interface of the CPE Router does not have a global IPV6 address,how is RPF going to work?
If you run unicast RPF (uRPF, RPF itself is for multicast) on the ISP router then this whill work regardless of the interface the CPE uses to source packets because all the address space delegated to the user is obviously routed towards the CPE so it will pass the uRPF check.
RPF needs global IPv6 addresses.
Link local addresses can't be forwarded by routers anyway, so uRPF and link locals are orthogonal.
Where is the packet with a link local source address supposed to go to?