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DHCPv6 "service dhcpv6-server global-parameters name-server" is not correctly exported to dhcpdv6.conf when multiple name-server entries are present
Closed, ResolvedPublicBUG


I've found a small issue with the changes implemented for T3379


service {
    dhcpv6-server {
        global-parameters {
            name-server XXXX:XXXX:XXXX::8D
            name-server XXXX:XXXX:XXXX::8E


option XXXX:XXXX:XXXX::8D;
option XXXX:XXXX:XXXX::8E;

This configuration format is wrong. is a comma-delimited, multi-value list of name-servers that should only appear once in the dhcpdv6.conf file.
If multiple entries are present, only the last entry is used.
The way vyos currently generates the dhcpdv6.conf file causes DHCPv6 clients to only receive information about a single name server.

Proper parsing of the vyos config would result in a dhcpdv6.conf that includes a single line like this:



Difficulty level
Easy (less than an hour)
VyOS 1.4-rolling-202105101243
Why the issue appeared?
Implementation mistake
Is it a breaking change?
Perfectly compatible
Issue type
Bug (incorrect behavior)

Event Timeline

c-po changed the task status from Open to In progress.May 15 2021, 3:12 PM
c-po claimed this task.
c-po triaged this task as Normal priority.
c-po changed Difficulty level from Unknown (require assessment) to Easy (less than an hour).
c-po changed Why the issue appeared? from Will be filled on close to Implementation mistake.
c-po changed Is it a breaking change? from Behavior change to Perfectly compatible.
c-po moved this task from Need Triage to Finished on the VyOS 1.4 Sagitta board.
c-po moved this task from Need Triage to Finished on the VyOS 1.3 Equuleus board.
SrividyaA set Issue type to Bug (incorrect behavior).Aug 31 2021, 5:49 PM