Slave: which master is choosen for XFR?

NSD
1

Hi!

NSD is a slave with multiple masters. When NSD receives a NOTIFY with a higher serial - which master will it contact for XFR? Always the one which sent the NOTIFY or just any of the masters?

I wonder if multi-master-check:yes is also usefull for NOTIFY-triggered XFR or only for SOA-refresh-value triggered SOA-checks.

Thanks
Klaus

2

Hi Klaus,

NSD is a slave with multiple masters. When NSD receives a NOTIFY with a
higher serial - which master will it contact for XFR? Always the one
which sent the NOTIFY or just any of the masters?

NSD will try the XFR from the master that sent the NOTIFY.

Regards,
Anand

3

In our setup we have 2 hidden masters and all Anycast-slaves have configured both masters.

If one hidden master is down, I see that some slaves "fall behind" as if they were still checking the currently not availble master. That's why I asked. Do you know if this is a new feature? Maybe I have to update the slaves.

Klaus