[Nsi-wg] Discovery Service

[Jeroen van der Ham]

Hi,

On 11 Oct 2012, at 10:14, John MacAuley <john.macauley at surfnet.nl> wrote:

> Peoples,
> 
> I was quite excited yesterday to be able to discover five of the deployed NSA.  Some didn't return version information, but at least the endpoints were available.  I spent some time running tests and realized that using the discovery interface is a simple way of determining NSA availability for management of connectivity.  I was easily able to determine those NSA that were up or down.  Obviously, this capability would be useful in production implementations.

Awesome :) I've been doing that by sending and cancelling a reservation, which worked a little bit, but this seems a better basic non-intrusive approach.

> Further thinking on this topic has me considering adding a simple "hello" or "ping" type message to Discovery that could be used to determine NSA availability without the need to retrieve the interface versions document.  We could also add simple information to the hello such as NSA uptime or a last restart token to permit a peer to determine if perhaps an audit should be performed.  Pretty standard capabilities in production systems.

Sounds like a good idea. Perhaps also some info on the last time the topology was updated?

Jeroen.