[j-nsp] DHCPv6 BLQ (Bulk Lease Query)

[Matt Peterson]

My understanding is the BLQ implementation is more geared between Juniper's
own DHCP local server, such as when running as a BNG.

--Matt

On Tue, Feb 17, 2026 at 3:12 PM Aaron Gould via juniper-nsp <
juniper-nsp at puck.nether.net> wrote:

> Thanks Phil, the event-options is something a coworker of mine is
> suggesting also.  I'll keep that option in my back pocket for research
> should other options fail to lead us to a satisfactory result.  The JTAC
> is telling me Active Lease Query needs to be enable along with Bulk
> Lease Query.  I tried it, but don't see anything further with Active
> Lease Query, so I'm waiting on JTAC to respond.  Previously, with a few
> Bulk Lease Query commands enabled, I do see the Juniper router do a TCP6
> connection to the DHCPv6 server port 547... this occurs when I do the
> manual request.  My coworker has configured KEA to allow BLQ, and he
> does see the activity and we see it working...again, only when I the
> manual request command shown below.  I don't see this occur following a
> reboot of the Juniper router, which is the desired outcome, since IA_PD
> routes become unreachable when the binding table is cleared, and I need
> it to be populated immediately following a router reboot to minimize
> downtime.
>
> me at lab-5048> request dhcpv6 relay bulk-leasequery routing-instance five
> Bulk Leasequery Message Send
>
> {master:0}
> me at lab-5048> show system connections inet6
>
> fpc0:
> --------------------------------------------------------------------------
> Active Internet connections (including servers)
> Proto Recv-Q Send-Q  Local Address  Foreign Address
>           (state)
> tcp6       0      0  1234:1234:1234::408f.60046
> 1234:1234:1234:a0ca:192:168:192:168.547       TIME_WAIT
> ...
>
>
>
>
> On 2/17/2026 2:49 PM, Phil Shafer wrote:
> > Is the command suitable for an event policy?  If not, an event script?
> >
> > +  event-options {
> > +      policy boot-time {
> > +          events SNMPD_TRAP_COLD_START;
> > +          then {
> > +              execute-commands {
> > +                  commands {
> > +                      "your command here";
> > +                  }
> > +              }
> > +          }
> > +      }
> > +  }
> >
> > You can add:
> >
> > +          within 30 {
> > +              trigger on 1;
> > +          }
> >
> > (Or other suitable time interval) if needed.
> >
> > Thanks,
> >   Phil
> >
> >
> >
> >
> > On 17 Feb 2026, at 13:16, Aaron1 via juniper-nsp wrote:
> >
> >> [External Email. Be cautious of content]
> >>
> >>
> >> I have DHCPv6 BLQ (Bulk Lease Query) working on a Juniper ACX5048 as
> relay talking to a remote KEA server, but only using the manual CLI
> “request” command.  I want/need this to work if/when Juniper router
> reboots.  Any ideas?
> >>
> >>
> >> Aaron
> >> _______________________________________________
> >> juniper-nsp mailing list juniper-nsp at puck.nether.net
> >>
> https://urldefense.com/v3/__https://puck.nether.net/mailman/listinfo/juniper-nsp__;!!NEt6yMaO-gk!GWBDefkHPluD1wf2BDRKhqkcElzMXiw4sRifxMf_E4ZKykiEn0PvA-Z2qA94g2muRS1Nt0FoweiC76Xx28n0YQ$
>
> --
> -Aaron
>
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