[2.1] `maas-rack observe-dhcp` command only supports IPv4

[Mike Pontillo]

Since the phrase "observe DHCP" doesn't imply an address family, the "maas-rack observe-dhcp" command should output both DHCPv4 and DHCPv6 packets (and/or have an option to filter them).

The reason it doesn't currently support this is because it is only intended as a support/debug command, and was only intended to debug MAAS's external DHCP detection feature, which currently also only supports IPv4.

[Mike Pontillo (mpontillo)]

This is probably a good drive-by fix for MAAS 2.3, since I already plan to enhance the beacon receive path to support IPv6. However, supporting DHCPv6 would be additional work, since the protocol and packet format are very different from IPv4's DHCP.

[Mike Pontillo (mpontillo)]

In addition, there would be additional effort required to observe DHCPv6 packets and report them to the region.

It would also be good to change the DHCP observation path from using the sockets layer to using the tcpdump method used by ARP and beacon observation. This would allow us to detect external DHCP on VLANs not known to MAAS, or interfaces without an IP address configured.

[Adam Collard (adam-collard)]

This bug has not seen any activity in the last 6 months, so it is being automatically closed.

If you are still experiencing this issue, please feel free to re-open.

MAAS Team