Modify dhcp relay to pick primary address #17012
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prsunny
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Nov 18, 2023
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@kellyyeh , could you please review this?
kellyyeh
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Nov 22, 2023
prsunny
previously approved these changes
Nov 22, 2023
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I have added test cases in the following PRs: sonic-net/sonic-mgmt#10828 and #17263 The second one is expected to fail as the vlan_interface changes in #16827 and the current PR changes are not in. |
yxieca
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Dec 4, 2023
This is change taken as part of the HLD: sonic-net/SONiC#1470 and this is a follow up on the PR #16827 where in the docker-dhcp we pick the value of primary gateway of the interface from the VLAN_Interface table which has "secondary" flag set in the config_db Microsoft ADO (number only): 16784946 How did I do it - Changes in the j2 file to add a new "-pg" parameter in the dhcpv4-relay.agents.j2, the ip would be retrieved from the config db's vlan_interface table such that the interface which are picked will have secondary field set. - Changes in isc-dhcp to re-order the addresses of the discovered interface and which has the ip which has the passed parameter.
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Why I did it
This is change taken as part of the HLD: sonic-net/SONiC#1470 and this is a follow up on the PR #16827 where in the docker-dhcp we pick the value of primary gateway of the interface from the VLAN_Interface table which has "secondary" flag set in the config_db
Work item tracking
How I did it
1: Changes in the j2 file to add a new "-pg" parameter in the dhcpv4-relay.agents.j2, the ip would be retrieved from the config db's vlan_interface table such that the interface which are picked will have secondary field set.
2: Changes in isc-dhcp to re-order the addresses of the discovered interface and which has the ip which has the passed parameter.
How to verify it
Validated using the existing test cases.
Which release branch to backport (provide reason below if selected)
Tested branch (Please provide the tested image version)
Description for the changelog
Modify dhcp relay to pick primary address
Link to config_db schema for YANG module changes
A picture of a cute animal (not mandatory but encouraged)