[rbridge] Convergence time

[Guillermo Ibáñez]

I recommend a reading of RSTP (IEEE 802.1D) protocol for mechanisms of 
fast reconfiguration and spanning tree reconstruction. Although 
convergence is alleged to extend to several seconds in case of root 
bridge failure (Myers 2004), tipical times are tenths, hundreds of 
milliseconds, not easy to achieve with routing protocols.
I am not familiar with fast rerouting but applying it to build spanning 
trees may be require a different solution than repairing routes with 
backup routes.
Guillermo Ibáñez

Alia Atlas wrote:

> I imagine that one could do fast-reroute techniques, depending on the
> convergence time requirements.  Given SPTs and a link-state protocol 
> are being used,
> I believe that the work in rtgwg could apply.
>
> Alia
>
> On 8/29/05, *Wojtek Paprowicz* <quasarus at gazeta.pl 
> <mailto:quasarus at gazeta.pl>> wrote:
>
>     Hi everybody,
>
>     I was wondering if convergence is a case in RBRIDGE idea. Taking
>     into concideration, that currently RBRIDGEs run ISIS, I think it
>     should be. How do you think should be the timers set in order to
>     achieve results similar to SDH? The default timers will not do the
>     trick. On the other hand, we cannot lower e.g. helloInterval too
>     much. The timers are also crucial for node/link failures and failure
>     recovery times. Be grateful for your opinions.
>
>     Regards,
>     Wojtek Paprowicz
>
>
>
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