Re: [v6ops] [Idr] BGP Identifier

[David Farmer <[e-mail]>]

On 2/17/14, 14:28 , joel jaeggli wrote:
> On 2/15/14, 11:25 AM, David Farmer wrote:
>
>> As an example: let's say your ROUTER_ID is 192.0.2.5 or 0xC0000205.
>> Then you can use an IPv6 loopback address of 2001:db8:1::c000:205, or
>> you could even used mixed notation 2001:db8:1::192.0.2.5.
>
> You could, but you shouldn't whether it's merely shorthand or not
> because ipv6 mapped ipv4 addresses and accompanying notation are are
> sort of ugly representation that will be throwing junior network
> operators under the bus for years to come.
>
> http://tools.ietf.org/html/draft-itojun-v6ops-v4mapped-harmful-00

I'd prefer to recommend that implementations include a hex 
representation of the ROUTER_ID, either in addition to or instead of the 
dotted quad decimal representation.  I need to study it more closely, 
but I think what I'm suggesting is compatible with the recommendation in 
RFC5952 Section 5. However, I take your point, even if compatible with 
RFC5952 Section 5, its best to avoid the problem if possible.


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