Yes, Cisco transceivers can work well on Meraki.   Meraki does not lock out third party transceivers. Not only can Cisco work well on Meraki, but also can many third parties have a good compatibility with Meraki.   10Gtek transceivers compatible with Cisco and Meraki. Their products are in a pretty good price. I have had good luck with 10Gtek https://www.sfpcables.com/sfp-transceivers  over the years. Maybe u can have a try. ... View more

10Gtek is a professional transceivers vendor that compatible with Cisco, Meraki and other named brands. 10Gtek products are in a pretty good price and high quality. I have had good luck with 10Gtek https://www.sfpcables.com/sfp-transceivers  and https://www.sfpcables.com/sfp-1-25g-series  over the years. ... View more

Yes, u can use AFBR-709SMZ (PAN-SFP-PLUS-SR ) on the palo alto, and MA-SFP-10GB-SR on the Meraki 425. Because the SFP+ transceivers u use is standard recommend for the network device. And they are SFP+ ports that  should be able to communicate just fine.    Since DAC is a low-cost and low-power option, why not try SFP+ DAC for replacing SFP+ transceivers and MMF? ... View more

1st Scenario - SFP+ for SMF to Catalyst 9300 and SFP to ISR 1100   Yes, it does! Cisco SFP's/SFP+'s are compatible with the Meraki SFP's/SFP'+s   2nd Scenario -  Copper Twinax to Catalyst 9300 and SFP to ISR 1100   Cisco twinax and Meraki twinax cables are both ok for u! And many third parties work well with Cisco and Meraki, such as 10Gtek. Yes, it does! Cisco SFP's/SFP+'s are compatible with the Meraki SFP's/SFP'+s   3rd Scenario - SFP+ for SMF to Catalyst 9300 and SFP copper to ISR 1100   Ur question should like this: Does  the  Meraki SFP+'s  are compatible with the Cisco SFP's? Yes, it does. The ISR 1100 has SFP+ ports, and the MS425 device is multi-rate and it has SFP+ ports (backwards compatible with SFP), so you can use SFP transceivers with a patch cable or SFP DAC to connect the two devices. However, the SFP DAC is not recommended for the it does not integrate DDM function. It is not excluded that some devices may have problems when use SFP DAC. So it is recommended to use the SFP transceiver directly. 10Gtek provides SFP+ twinax cables and SFP, SFP+ transceivers for u that compatible with Cisco and Meraki.   Hope this helps Thank you! ... View more