Page MenuHomeVyOS Platform

[DHCP-SERVER] error parameter on Failover
Closed, ResolvedPublicBUG



I've been testing this feature dhcp-server failover , we have an issues regarding the port that it should be listening (on 647)

if we checked the rfc , it said that this port should be initiated over port 647 :

All failover TCP connections are initiated over port 647.  Every
server implementing the failover protocol MUST listen on port 647.

this issues is related with default configuration on ISC DHCP :

vyos@vyos:~$ cat /run/dhcp-server/dhcpd.conf
### Autogenerated by ###

# For options please consult the following website:
# log-facility local7;

ddns-update-style none;
option rfc3442-static-route code 121 = array of integer 8;
option windows-static-route code 249 = array of integer 8;
option wpad-url code 252 = text;

# DHCP failover configuration
failover peer "testdhcp" {
    mclt 1800;
    split 128;
    port 520;
    peer address;
    peer port 520;
    max-response-delay 30;
    max-unacked-updates 10;
    load balance max seconds 3;


Difficulty level
Unknown (require assessment)
VyOS 1.3.0
Why the issue appeared?
Will be filled on close
Is it a breaking change?
Perfectly compatible
Issue type
Bug (incorrect behavior)

Related Objects

Mentioned In