Re: [v6ops] IPv6 LL-only as WG document - feedback requested

["Carlos Pignataro (cpignata)" <[e-mail]>]

Michael, Brian,

Should "The Suggested Approach" http://tools.ietf.org/html/draft-behringer-lla-only-01#section-2.1 also include some prescriptiveness or specific recommendation regarding the use of RFC 5837, instead of including that solution to interface identification as a "Caveats and Possible Workarounds" only?

Thanks,

-- Carlos.

On Aug 6, 2012, at 5:24 AM, Brian E Carpenter wrote:

> Hi,
> 
>>   o  Management plane traffic, such as SSH, Telnet, SNMP, ICMP echo
>>      request ... can be addressed to loopback addresses of routers with
>>      a global scope address.  Router management can also be done over
>>      out-of-band channels.
>> 
>>   o  ICMP error message can also be sourced from the global scope
>>      loopback address.
> 
> These statements seem too weak. Using GUAs for ICMP in particular
> needs to have a normative MUST somewhere (preferably in a BCP). In the
> context of this Informational draft, the language needs to state a requirement
> ("must" not "can") even if you don't use RFC 2119 terminology.
> 
> This matters because packets with a LL source address MUST NOT be forwarded,
> so a router that is misconfigured to send ICMP replies with a LL source
> address breaks both ping and traceroute.
> 
> I think the rule is that any packet that is *not* sent to a LL address must
> have a GUA as the source address. That takes care of ICMP, and everything else
> as well.
> 
> Furthermore, that GUA needs to be associated with a prefix that belongs to
> the organisation operating the router in question. Otherwise the traceroute
> results can be very confusing. We discussed that on v6ops back in March.
> 
> Regards
>   Brian Carpenter
> 
> 
> 
> 
> On 06/08/2012 10:03, Gunter Van de Velde (gvandeve) wrote:
>> (distributed to OPSEC WG and in cc v6ops)
>> 
>> Dear all,
>> 
>> During the OPSEC WG meeting last Wednesday there was consensus to adopt the draft http://tools.ietf.org/html/draft-behringer-lla-only-01 as working group document with Informational status.
>> 
>> Please read the draft, and if there is no violent objection on the list, the document will be requested to be submitted as WG document in 7 days.
>> 
>> Ciao,
>> G/, KK & Warren
>> 
>> 
>> 
>> ------------------------------------------------------------------------
>> 
>> _______________________________________________
>> v6ops mailing list
>> [e-mail]
>> https://www.ietf.org/mailman/listinfo/v6ops
> _______________________________________________
> v6ops mailing list
> [e-mail]
> https://www.ietf.org/mailman/listinfo/v6ops
>