I'm trying to use DHCP and DHCPv6 for the first time on VyOS instead of PfSense.
I use static-mapping on both DHCP and DHCPv6 so I can match the networks and IP addresses on both IPv4 and IPv6 addresses for a client.
For instance:
```
10.1.10.51 myhost
2001:db8:abcd:10::51 myhost
```
DHCPv4 static-mapping is working fine.
However, on DHCPv6 I have:
```
service {
dhcpv6-server {
shared-network-name DHCP-MAN {
subnet 2001:db8:abcd:10::/64 {
address-range {
start 2001:db8:abcd:10::101 {
stop 2001:db8:abcd:10::199
}
}
lease-time {
default 7200
maximum 7200
minimum 3600
}
name-server 2001:db8:abcd:10::1
}
}
}
}
```
When I run "set show dhcpv6 server leases" it shows
```
IPv6 address State Last communication Lease expiration Remaining Type Pool IAID_DUID
--------------------- ------- -------------------- ------------------- ----------- ------------- -------- -----------------------------------------------------------------
2001:db8:abcd:10::198 active 2022/07/08 10:44:32 2022/07/08 12:44:32 0:52:22 non-temporary DHCP-MAN eb:0f:22:b6:00:04:4e:09:79:19:a0:b2:ee:72:a8:0b:e6:40:af:f2:7a:b9
```
I thought the displayed IAID_DUID would be the identifier I put in to a static mapping like so:
```
set service dhcpv6-server shared-network-name DHCP-MAN subnet 2001:sb8:abcd:10::/64 static-mapping myhost identifier eb:0f:22:b6:00:04:4e:09:79:19:a0:b2:ee:72:a8:0b:e6:40:af:f2:7a:b9
set service dhcpv6-server shared-network-name DHCP-MAN subnet 2001:470:b8c3:10::/64 static-mapping myhost ipv6-address 2001:db8:abcd:10::51
```
However that didn't work, the address of my client never changed to the desired 2001:db8:abcd:10::51
After a day or so (to make sure it was timing out properly and it still didn't change) I finally did a
```
grep duid /var/log/messages
```
and found the following line
```
Jul 8 00:15:39 vyos-test dhcpd[10950]: Reply NA: address 2001:db8:abcd:10::198 to client with duid 00:04:4e:09:79:19:a0:b2:ee:72:a8:0b:e6:40:af:f2:7a:b9 iaid = -1239281685 valid for 7200 seconds
```
Note that that "duid" is completely different from the listed IAID_DUID.
So when I put that "duid" like so:
```
set service dhcpv6-server shared-network-name DHCP-MAN subnet 2001:db8:abcd:10::/64 static-mapping myhost identifier 00:04:4e:09:79:19:a0:b2:ee:72:a8:0b:e6:40:af:f2:7a:b9
```
then things finally worked and my client got the expected 2001:db8:abcd:10::51 address.
All that is a long-winded explanation to finally request the following:
If possible, please change the displayed IAID_DUID to DUID (the "duid" listed in the /var/log/messages) so that people can more easily find out the DUID of the client and set that in the static-mapping.
Without that information, the user has to do a "grep duid /var/log/messages" to find the DUID (listed as "duid" in the messages file) to put in to the static-mapping.
I hope that makes sense.
I think that would make things tremendously easier to use in setting up IPv6 DHCPv6 static mappings.
Does all that make sense?
Am I missing some other place or piece of information that would accomplish easily finding out the proper DUID?
Thanks for your consideration.