after upgrade to os version 17 gtm query slow to resolved domain

[herdi]

hello

anyone have experience after upgrade gtm from 14 version to 17.1.0.3 dns query resolved so long take more hours 

Thanks 

[T-Trust]

Hi 

1. So i think if DNS query resolve so long take the result more hours, the issue relate about LDNS cache timeout during you upgrade,

- Could you please let me know how many GTM in your evironment

- Nameserver for GTM that setup in SOA ?

[herdi]

- Could you please let me know how many GTM in your evironment

 on DC i have 2 gtm external active standby

on DRC i have 2 gtm external active standby (all of 1 sync group )

- Nameserver for GTM that setup in SOA ? 

refresh :1200

retry 300

exopire 1209600

Negative TTL 300

nameserver :ns1

[T-Trust]

Hi Herdi,

ns1 that's listener IP on F5 GTM DC right ?

[herdi]

yes

i checked a record on zone via gui and cli bash and the record exist

then i used dig command on gtm 

dig @localhost example.com and record exist but i tried on my pc using dig and nslookup but not resolved, after long time i tried again and can to resolved it, 

i am not is whot the query took so long time, normally i created record and nslookup and resolved without waiting so long

[Nikoolayy1]

I do not know if you have many F5 DNS/GTM that are different versions because of the update if an update of the big3d is needed on the F5 devices that are in a DNS sync group could help but who knows :

Article Detail (f5.com)

[T-Trust]

So i think if nameserver that you have only DC, When you upgrade DC, DNS service go down becasue LDNS cannot  reach to name server DC