[dhcp_relay] DHCP relay support for IPv6 #8871
Merged
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NOTE: This is cherry-pick from master to 202012.
#7772
Why I did it
Currently SONiC use the 'isc-dhcp-relay' package to allow DHCP relay functionality on IPv4 networks only.
This will allow the IPv6 functionality along the IPv4 type.
How I did it
Edit supervisord template to start DHCPv6 instances when configured to do so on Config DB.
Align cfg unit test to the new change.
Add DHCPv6 relay minigraph parsing support and a suitable t0 topology xml file for UT.
How to verify it
Configure DHCPv6 agents as described on the feature HLD: sonic-net/SONiC#765
Test it with real client/server with IPv6 or use the dedicated automatic test: sonic-net/sonic-mgmt#3565
Signed-off-by: Shlomi Bitton shlomibi@nvidia.com
(cherry picked from commit 604becd)
Why I did it
How I did it
How to verify it
Which release branch to backport (provide reason below if selected)
Description for the changelog
A picture of a cute animal (not mandatory but encouraged)