Re: hop-by-hop and router alert options [Re: Question about use of RSVP in Production Networks]

--On Mittwoch, 11. August 2004 14:58 Uhr +0300 Pekka Savola 
<pekkas@netcore.fi> wrote:

| On Tue, 10 Aug 2004, Fleischman, Eric wrote:
|> I am aware of some use of RSVP in labs but I am not aware of any use
|> of RSVP in production networks (i.e., real life networks people
|> connect to the Internet with). Simultaneously, I am encountering
|> I-Ds and other work planning to use RSVP. This possible disconnect
|> concerns me. Therefore, I would appreciate being educated by anybody
|> using RSVP in production settings. Would you please let me know how
|> many devices, what applications, and how successful these
|> deployments (if any) are? Thank you.
|
| I'd be interested about this as well, but also in more general.
|
| I'd be in favor of deprecating the IP router alert option completely.
| Effectively this affects RSVP and MLD *).  I'd want to similarly do
| away with the IPv6 Hop-by-Hop options.  At the very least, I'd like to
| prevent further standardization of these options.

Hmm, NSIS protocol suite (new protocol that does path-coupled QoS signaling 
ala RSVP and firewall/NAT signaling) relies on the use of router alert 
options for the initial NSIS peer discovery process.  Is there any other 
proposal to get a discovery mechanism like router alert options without the 
disadvantages of this option?

  Martin

|
| The justification is simple: any "magic" packets which all routers on
| the path must somehow examine and process seems a very dubious concept
| when we want to avoid DoS attacks etc. on the core equipment which
| must run on hardware: effectively this means that either these are
| ignored in any case (nullifying the use of such options), or put on a
| "slow path" (causing a potential for DoS).  IMHO, it seems just simply
| bad protocol design to require such behaviour.
|
| I'm interested what others think about this.. :)
|
| *) MLD should be relatively straight-forward to re-design (just send
| the MLD reports to a link-local address which the router is
| listening), or just keep it as is for now.  RSVP can probably thrown
| away without many tears.
|
| --
| Pekka Savola                 "You each name yourselves king, yet the
| Netcore Oy                    kingdom bleeds."
| Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
|
|
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