Canon LBP633Cdw - devices see AirPrint printer but cant connect to it

[Cromanin]

Setup a new printer yesterday, all was perfectly fine. Today I discovered that my iOS devices can see the printer, but can not connect to it.

I did all possible variants of troubleshooting - restart devices and printer, check mDNS, toggle AirPrint and IPP printing on/off, nothing helped, printer is visible but "disconnected from network".

Device info:

Main Controller:Boot ROM:DCON:Language:

05.10

01.00

01.05

01.15

dns-sd output for printer:

Canon\032LBP633Cdw._ipp._tcp.local. can be reached at Canon\032LBP633Cdw.local.:631 (interface 7) txtvers=1 rp=ipp/print note= qtotal=1 priority=10 ty=Canon\ LBP633C product=\(Canon\ LBP633C\) pdl=application/octet-stream,image/urf,image/pwg-raster,image/jpeg,application/pdf adminurl=http://Canon\ LBP633Cdw.local:80/airprint.html usb_MFG=Canon usb_MDL=LBP633C Transparent=F Binary=F TBCP=F Color=T Copies=T Duplex=T PaperCustom=T Bind=F Collate=F Sort=F Staple=F Punch=0 PaperMax=legal-A4 UUID=6d4ff0ce-6b11-11d8-8020-6cf2d820d42c usb_CMD=LIPSLX,CPCA TLS=1.2 Scan=F Fax=F URF=ADOBERGB24,CP255,DM1,PQ4,RS300,SRGB24,W8-16,FN3,IS1-4,OB10-40,V1.5 kind=document,envelope,postcard print_wfds=T mopria-certified=2.1

ChatGPT claims the problem is with TLS=1.2 part, but I have TLS disabled in IPP settings.

Appreciate your help.

[Cromanin · Accepted solution]

Follow up: TLS was a false flag. After network stack reset all is working fine gain. 

Will check tomorrow see if it sticks.

[Cromanin]

Ok 2 days and all runs fine. Looks like it was a firmware glitch and network reset resolved it.