Re: [RAM] draft-lear-lisp-nerd-01

[Dino Farinacci <dino at cisco.com>]

> In part I'd have to say, "Guilty as charged", but I am thinking  
> about the other problem.  We'll need some sort of feedback  
> mechanism between ETR and ITR to indicate when an ETR is or is not  
> available.  Dino has posited some form of ICMP unreachable  
> message.  Some people don't like ICMP.  Another approach is simply  
> a periodic acknowledgment of some form built into the tunneling  
> mechanism, where one would expect an acknowledgment initially and  
> then periodically.  But I heartily agree this area needs more work.

ICMP unreachable messages are not what the LISP-01 draft solely  
depends on for Locator reachability. We have put "Locator  
Reachability Bits" in the encapsulation header to piggyback Locator  
status for returning packets.

The LISP-01 draft should be in the ID directory today. If people  
can't wait, I can post it here.

Dino

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