13 Úno
2024
13 Úno
'24
13:27
Hi,
I wonder if it would be possible that one may use arithmetics in knot.conf such as:
propagation-delay: 5 * dnskey-ttl
I'd like to set a propagation-delay safety net during ZSK rotations depending on SOA
TTL set for any given zone.
As dnskey-ttl defaults to zone SOA TTL that would allow for propagation-delay definitions
as multiples of SOA TTLs.
As I couldn't find that in the documentation, I do assume that this cannot be done,
right?
Are there alternatives at hand I overlooked?
Regards,
Michael
13 Úno
13 Úno
14:01
Hi Michael,
There is no universal rule for propagation delay calculation, as the value is
deployment-dependent.
For example, the value depends on the latency (affects big zone XFR) between primary and
secondary servers,
or if someone has a long chain of servers where each level adds some delay. Additionally,
the value should
account for possible recovery delay in case of failures.
Daniel
On 2/13/24 14:27, Michael Grimm wrote:
Hi,
I wonder if it would be possible that one may use arithmetics in knot.conf such as:
propagation-delay: 5 * dnskey-ttl
I'd like to set a propagation-delay safety net during ZSK rotations depending on SOA
TTL set for any given zone.
As dnskey-ttl defaults to zone SOA TTL that would allow for propagation-delay definitions
as multiples of SOA TTLs.
As I couldn't find that in the documentation, I do assume that this cannot be done,
right?
Are there alternatives at hand I overlooked?
Regards,
Michael
--
16:21
Hi Daniel,
thanks for your explanation about influencing factors when it comes to propagation
delays.
No big deal that knot.conf keywords cannot be used as variables as well.
I will set propagation-delay to my liking.
Regards,
Michael
On 13. Feb 2024, at 15:01, Daniel Salzman
<daniel.salzman(a)nic.cz> wrote:
Hi Michael,
There is no universal rule for propagation delay calculation, as the value is
deployment-dependent.
For example, the value depends on the latency (affects big zone XFR) between primary and
secondary servers,
or if someone has a long chain of servers where each level adds some delay. Additionally,
the value should
account for possible recovery delay in case of failures.
Daniel
On 2/13/24 14:27, Michael Grimm wrote:
Hi,
I wonder if it would be possible that one may use arithmetics in knot.conf such as:
propagation-delay: 5 * dnskey-ttl
I'd like to set apropagation-delay safety net during ZSK rotations depending on SOA
TTL set for any given zone.
As dnskey-ttl defaults to zone SOA TTL that would allow for propagation-delay definitions
as multiples of SOA TTLs.
As I couldn't find that in the documentation, I do assume that this cannot be done,
right?
Are there alternatives at hand I overlooked?
Regards,
Michael
--
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294
days inactive
294
days old
2 comments
2 participants
participants (2)
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Daniel Salzman -
Michael Grimm