Re: [manet] AODV working across subnets

["Charles E. Perkins" <charliep at iprg.nokia.com>]

Hello,

AODV is specified to work with collections of network nodes
organized into a subnet.  This is basically done by providing the
network prefix information as part of a RREP message.  The
router that provides the RREP is not a default router, but just
a router for the particular subnet.  The router has to follow some
basic rules to maintain a sequence number that applies to the
entire subnet.

There are other specifications for using an Internet Gateway as
a default router.  I think this makes sense, and it means that if a
manet node does not have a route to a particular destination,
it will then send the packet to(wards) the default gateway.  With
this model, a network node can use a default router that is more
than one hop away.  You can see a specification for this in a
draft from Ryuji Wakikawa.

Regards,
Charlie P.


manet user wrote:

> Hi,
>  
> I have a very basic question about AODV. Since AODV is a flat 
> protocol, does that mean two nodes in different subnets (e.g. 
> 192.0.1.1 and 192.0.2.1) can talk to each other directly. It seems 
> AODV does not implement the notion of default gateway or hierarchical 
> routing and maintain routes as /32 addresses. So a router with 5 
> interfaces in different subnets will be considered as five virtual 
> nodes for a neighbor node??
>  
> Any comment in this matter will be greatly appreciated. Links to 
> implementation/documentation about default gateway concept in AODV 
> will be a great help.
>  
> Thanks in advance,
> -MU
>
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