Re: [OPSAWG] IPv6 zoneid in SNMP

[Juergen Schoenwaelder <[e-mail]>]

On Sat, Feb 04, 2012 at 03:18:37PM +0100, t.petch wrote:
> [RFC4001] defines a 4 byte zone index for IPv6 with a display hint of 'd'
> 
>  "InetAddressIPv6z ::= TEXTUAL-CONVENTION
>      DISPLAY-HINT "2x:2x:2x:2x:2x:2x:2x:2x%4d"
>      DESCRIPTION
>          "Represents a non-global IPv6 network address, together
>           with its zone index:
>             Octets   Contents         Encoding
>              1-16    IPv6 address     network-byte order
>             17-20    zone index       network-byte order
> 
> Is this in use?
> 
> I ask because 
> draft-carpenter-6man-uri-zoneid-00.txt
> under discussion on the 6man list, has ABNF of
>  ZoneID = 1*15unreserved
> which is a bit different (well, completely different:-(

You can identify an interface by a number (ifIndex in SNMP land) or by
a name. In other words, you can either identify an interfaces by using
the result of if_nametoindex() [RFC3493] or its argument.

On command lines and in URLs, systems and humans usually prefer names
- internally systems usually prefer numbers (and SNMP land is
typically closer to internal APIs and uses ifIndex values natively to
identify interfaces).

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: [phone]         Campus Ring 1, 28759 Bremen, Germany
Fax:   [phone]         <http://www.jacobs-university.de/>