Re: [dpdk-dev] [PATCH v7 1/5] examples/l3fwd: fix LPM IPv6 subnets

["Walsh, Conor" <conor.walsh@intel.com>]

<snip>

> >
> > The IPv6 subnets used were not within the 2001:200::/48 subnet
> 
> {{32, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 48, 0},
> {{32, 1, 2, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0}, 48, 1},
> etc...
> 
> Err... all those subnets were exactly == 2001:200::/48.
> Is the issue that the example needs *separate* subnets taken from
> within 2001:200::/48 ?

Hi David,
As it is ATM any IP with that range will match for all the rules for the 8 ports and the application cannot differentiate between them and it just returns the traffic to sender.
After this change the ports can be individually matched using the smaller /64 ranges for each port which are still within the given /48 subnet range (RFC5180).

> 
> 
> > Changed to 2001:200:0:{0-7}::/64 where 0-7 is the port ID
> >
> > Fixes: 37afe381bde4 ("examples/l3fwd: use reserved IP addresses")
> 
> And this looks like a Cc: stable@dpdk.org candidate.

I can send a v8 and CC stable if you think that’s needed.
Thanks,
Conor.

> 
> >
> > Signed-off-by: Conor Walsh <conor.walsh@intel.com>
> > Acked-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
> 
> 
> --
> David Marchand