[AusNOG] ipv6, TID ADSL and SRX working

[Ben Dale]

During the X46 beta, I convinced engineering to remove the constraint check that required IA-NA and IA-PD to be defined before the config would commit, so PD now works with Internode just fine.  Apparently Verizon(?)'s deployment doesn't have this issue and having IA-NA configured doesn't cause the massive re-transmit storm.

The following snippet will get PD working, and propagate the associated downstream RAs:

    family inet6 {
        dhcpv6-client {
            client-type statefull;
            client-ia-type ia-pd;
            rapid-commit;
            update-router-advertisement {
                interface vlan.10;
            }
            client-identifier duid-type duid-ll;
            req-option dns-server;
            update-server;
        }

If you specify multiple interfaces under update-router-advertisement, the SRX will just allocate consecutive /64s from your delegation and automatically start dishing them out:

2001:44b8:2881:7718:1::1/128
                   *[Local/0] 14:23:21
                      Local via vlan.10
2001:44b8:2881:7718:2::1/128
                   *[Local/0] 14:23:21
                      Local via vlan.11


What still appears to be broken though is enabling dhcpv6 on the downstream side - configuration won't commit without explicitly defining the prefix you're using to allocate from, which somewhat undermines PD in the first place.  It also doesn't appear to be handing out the delegated DNS.

Anyway, the X47 beta should kick off soon - hopefully we get Juniper to iron out the last few issues!

Cheers,

Ben

On 24 Jan 2014, at 6:22 am, Lindsay Hill <lindsay.k.hill at gmail.com> wrote:

> I've been using 12.1X46-D10.2 with Snap in NZ for a few weeks now. It's nice that they've finally fixed the commit issue, but disappointing that it took so long, and wasn't documented in the release notes.
> 
> Until yesterday it had been stable, but then I started seeing a few issues with v6 breaking. Haven't had time to properly investigate.
> 
> Still haven't been able to figure out how to pass parameters to the DHCPv6 server. The docs sort of imply that you can do it, but I haven't seen a full working config.
> 
> Lindsay
> 
> 
> On Fri, Jan 24, 2014 at 8:17 AM, Mark ZZZ Smith <markzzzsmith at yahoo.com.au> wrote:
> 
> 
> 
> 
> ----- Original Message -----
> > From: Peter J. Cherny <peterc at luddite.com.au>
> > To: ausnog at lists.ausnog.net
> > Cc:
> > Sent: Thursday, 23 January 2014 8:59 PM
> > Subject: [AusNOG] ipv6, TID ADSL and SRX working
> >
> > Just for the record ...
> >
> > Model: srx110h-va
> > JUNOS Software Release [12.1X46-D10.2]
> >
> > dhcp6 PD now works with TID ADSL
> > so as well as an HE tunnel, I have a native PA /56
> >
> > peterc at luddite-srx-01> show config interfaces at-1/0/0 unit 0 family
> > inet6
> > dhcpv6-client {
> >      client-type statefull;
> >      client-ia-type ia-pd;
> >      inactive: rapid-commit;
> >      client-identifier duid-type duid-ll;
> > }
> > ____
> 
> Are they supplying any other parameters via DHCPv6, such as NTP, DNS? If they are, the other thing to try to work out is how to then propagate them to your DHCPv6 server facing your downstream interfaces, to automate providing them to downstream hosts.
> 
> Regards,
> Mark.
> 
> 
> 
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