Christopher Morrow wrote:
> On Mon, May 26, 2008 at 5:12 PM, Suresh Krishnan
> <[EMAIL PROTECTED]> wrote:
>> Hi Bernd,
>>
>> [EMAIL PROTECTED] wrote:
>>> Hi all,
>>>
>>> I'm contacting you as I've a question regarding the Hop-by-Hop header
>>> option 'Router Alert' and its exact use. I hope I don't disturb you...
>> I am generally against any new proposal that uses hop by hop options
>> (including router alerts) since they could increase the processing loads
>> on intermediate routers and could be used as a DoS vector,
>>
> 
> most larger ip backbones today don't pay attention (drop/ignore)
> Router-Alert ip-options in ipv4, I don't expect that trend to change
> in ipv6... If you are planning on using hop-by-hop or router-alert in
> ipv6 you probably are planning on a failed solution.

Amen to that. I think the IETF needs to advise people to not use these 
to design new protocols. I did volunteer to write up a document stating 
just that, but there was sufficient interest in keeping these options alive.

Cheers
Suresh

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