> There appears to be a fetal implementation or ND Proxy in ip_ndp.c (see 
 > references to NCE_F_PROXY) whose origins are a bit of a mystery.  The 
 > flag and the code surrounding it (currently the dangling NDF_PROXY_ON and 
 > NDF_PROXY_OFF flags for the SIOCLIFSETND ioctl, and twiddling the 
 > override bit in Neighbor Advertisements if NCE_F_PROXY is set) appear to 
 > be dead.
 > 
 > Much more infrastructure needs to be in place for ND Proxy to work 
 > (including forwarding ND messages, and joining solicited-node multicast 
 > groups for nodes being proxied, etc.), and this isolated flag does not 
 > figure in this solution.  An existing ND Proxy RFC exists (RFC 4389), but 
 > this flag is not part of an implementation of this experimental protocol.
 > 
 > My opinion is that this flag and the code surrounding it is in fact dead 
 > and does not do anything.  Does anyone have any additional insight into 
 > this?  I think it could safely be removed.

A related bit of seemingly-dead code is the NDF_ANYCAST_ON/NDF_ANYCAST_OFF
logic.  Seems like all of this stuff should go.

-- 
meem
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