send_packet6: Network is unreachable

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send_packet6: Network is unreachable

Claus Lensbøl
Hi

I am implementing a dhcpdv6 deployment for a living facility based off
of a OpenBSD router.

I have so far been running rtadvd for SLAAC addresses which is running
fine but some people need
prefix delegation for their own equipment and thus I am working with
dhcpdv6.

The error I am getting is:

Solicit message from fe80::2e59:e5ff:fe00:9b09 port 546, transaction ID
0x5B174E00
Picking pool address 2a02:188:5002:7a00::ff
Advertise NA: address 2a02:188:5002:7a00::ff to client with duid
00:04:e8:b6:be:e1:99:b6:bf:f0:35:23:b6:6c:37:8b:2f:04 iaid = -452945143
valid for 600 seconds
Sending Advertise to fe80::2e59:e5ff:fe00:9b09 port 546
send_packet6: Network is unreachable
dhcpv6: send_packet6() sent -1 of 168 bytes

netstat gives routing table as:
# netstat -rn | grep 9b09
fe80::2e59:e5ff:fe00:9b09%vlan710  link#106 UHLc       0        0    
-     4 vlan710
ff02::1:ff00:9b09%vlan710          link#106 UHLc       0        0    
-     4 vlan710

All this is running in a VLAN setting with all the "client" interfaces
running on top of the same physical interface.
This means that all the VLAN interfaces has the same link-local address,
however, OpenBSD puts a scope on the interface.

vlan710:
flags=48843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,INET6_NOPRIVACY> mtu 1500
         lladdr 84:34:97:11:c4:95
         description: vlan710
         priority: 0
         vlan: 710 parent interface: bge1
         groups: vlan
         status: active
         inet6 fe80::8634:97ff:fe11:c495%vlan710 prefixlen 64 scopeid 0x6a
         inet6 2a02:188:5002:7a00::1 prefixlen 64
         inet 10.7.10.1 netmask 0xffffff00 broadcast 10.7.10.255


Does anyone have a clue on what this issue could be?

--
Med venlig hilsen/Best regards
Claus Lensbøl

Fab:IT ApS
Vesterbrogade 37, 2. th
DK-1620 København
Tlf: +45 70 202 407

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