[support] About the architecture of the MIPv6 daemon [Second Part]

[Romain KUNTZ]

On 2009/03/10, at 11:29, Angel Bartomeu Bonillo wrote:
> Another issue. I red in a .doc provided by Romain that when on link  
> goes down, the tunnel on that link is destroyed and the traffic  
> redirected to the default tunnel, so,
> what is the default tunnel?

# note for other people on this list: the document Angel refers to is
# a publication about the MCoA implementation [1]

The "default" tunnel is the one with the highest priority (BidPriority  
option in the configuration file).

> and, what if is the default tunnel what goes down, to which tunnel  
> is then the traffic redirected?

Each time a tunnel is destroyed or built, the default tunnel becomes  
the one with the highest BidPriority (among the one currently  
available).

> And another question. What CoA is used for MIP messaging (Binding  
> Updates, and so on) between the MR and the HA?

This is one bug/limitation of the current MCoA implementation : the  
CoA used for mobility messaging (and more generally for all messages  
exchanged between the MN and the HA by using Destination option header  
and routing header type 2) is not necessarily the one of the default  
tunnel.

Cheers,
romain

[1] http://www.rkuntz.org/pub/papers/20061128-AINTEC-NEMO-MCoA-KuntzR-LorchatJ.pdf