[radvd-devel-l] Router advertisement and forwarding on client side?

vincent.trucmuche vincent.trucmuche at laposte.net
Tue Mar 20 04:22:05 EST 2007

Hi everybody, :)

>> Could we imagine a simple warning? A sentence like:
>> "You are running radvd while not forwarding... are you sure
>> this is what you want?"
> This is how it's happening if radvd is run in debug mode.
OK but don't you think that, regarding to RFCs, it would be
more appropriate having this behaviour not only in debug mode?
Or, perhaps, we could imagine a option in radvd.conf to allow
starting even in non-forwarding mode?

> You didn't tell which information would be distributed with
> What radvd configuration would you use? Which ND options
would be 
> sent?
In a LAN where router and "configuration server" would be
separate machines, router could "announce" itself as "default
gateway" using RA w/o prefixes and the "configuration server"
could announce ONLY prefixes using RA w/ "router lifetime" to
0 (telling it is not a default router). DHCP will provide
other informations (DNS, NTP...).

> Just Prefix Information options?  Are you suggesting that
radvd will 
> be able to start in non-forwarding mode if the configuration
> 'AdvDefaultLifetime 0' and no more-specific route
statements? If yes, 
> are you willing to create a patch that does this cleanly?
If you are OK to add this patch to radvd I will provide it to
you. :)

> As far as I understand, DHCP-PD will set up the routing for the 
> delegated prefix (on the upstream side) and the default
route (on the 
> downstream WAN interface).
I don't think so. There is nothing in RFC 3633.


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