Re: Fwd: [ipv6mib] So, where were we?

[Brian Haberman <bkhabs@nc.rr.com>]

Juergen,
     So, should we look at trying to simplify the indices for the
tables?  That would seem like the logical thing to me.

Brian

Juergen Schoenwaelder wrote:
> 
> >>>>> Michael MacFaden writes:
> 
> Michael> Given the history of the IP-FORWARD-MIB: ipRouteTable,
> Michael> ipForwardTable, and the ipCidrRouteTable a minimalist
> Michael> approach might mean we have a higher probability that can get
> Michael> this new work to full standard.
> 
> The problem with the IP-FORWARD-MIB is that many systems use
> forwarding bases which are much richer than what the indexing allows
> to report. On such systems, implementing the ipCidrRouteTable (and the
> ipRouteTable) means to report only a subset of the real forwarding
> information. Hence, management applications which try to interpret
> these MIB tables are kind of fooled. This is of course even worse on
> systems that only have ipRouteTable support.
> 
> If we really care about interoperable management applications, then we
> need to spell out very clearly that an IP version independent variant
> of the ipCidrRouteTable is only applicable on devices where the
> complete forwarding information can be represented in the
> ipCidrRouteTable. (And it is my understanding that for example a
> recent Linux box would not fit into this category.)
> 
> We can try to improve this by adding more stuff into the index.
> However, we will end up with something that is getting even harder to
> implement correctly. And we all know that retrieving routing tables of
> non-trivial size via SNMP is already one of the slowest operations you
> can do on some boxes.
> 
> So while I in general like incremental approaches, I am not sure this
> really works out in the particular case of the IP-FORWARD-MIB.
> 
> /js
> 
> --
> Juergen Schoenwaelder    <http://www.informatik.uni-osnabrueck.de/schoenw/>
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