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drtik
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Chromecast is not discoverable on second AP

Sun Nov 10, 2019 2:38 am

Hi everyone,
I have mikrotik hap AC2

I put my chromecast devices on separate wireless AP. each AP has it's own DHCP, subnet and separate bridge.

AP1 - has chromecast devices
AP2 - everything else
Unfortunately, although I am able to cast as long as my phone joins AP1, I cannot discover/cast from AP2.
I've enabled IGMP in both APs and I have forward accepted between the APs.
I can ping from AP2 to AP1 but not cast.

your help is appreciated
regards
 
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AlainCasault
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Re: Chromecast is not discoverable on second AP

Sun Nov 10, 2019 5:23 am

I'm not any expect of chromecasts, but I'm guessing that the discovery part is purely layer 2.

When I'm on a different vlan of the same AP, I can't discover the CC or my Bose speaker for that matter.


Sent from my cell phone. Sorry for the errors.

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drtik
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Re: Chromecast is not discoverable on second AP

Sun Nov 10, 2019 10:56 am

Thank you Alain for your response. I guess Chromecast and bose speakers use the same technology to advertise themselves!
How did you overcome the issue in your case?
 
pe1chl
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Re: Chromecast is not discoverable on second AP

Sun Nov 10, 2019 12:28 pm

You will at least have to install and configure multicast routing.
But I think there were more issues, I seem to remember that the Chromecast sends everything with TTL=1 so that has to be mangled too.
Easiest is to change your AP setup so Chromecast and users are in the same segment.
 
joegoldman
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Re: Chromecast is not discoverable on second AP

Sun Nov 10, 2019 12:40 pm

they use mDNS / Bonjour protocols, so devices must be on the same broadcast domain - your best bet is to use some sort of proxy device that sits on both LANs and can relay the relevant discovery packets.
 
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AlainCasault
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Re: Chromecast is not discoverable on second AP

Sun Nov 10, 2019 3:37 pm

Thank you Alain for your response. I guess Chromecast and bose speakers use the same technology to advertise themselves!
How did you overcome the issue in your case?
I took the easy way out. Add pe1chi suggested, same subnet. ;)

Sent from my cell phone. Sorry for the errors.

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Alain Casault, Eng.
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drtik
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Re: Chromecast is not discoverable on second AP

Sun Nov 10, 2019 3:39 pm

@joegoldman and @pe1chl

Thank you so much guys for your responses, I am coming to the conclusion that this seems to be the only solution at the moment :(

I've noticed that if I connect a phone to AP that has chromecast, then disconnect the phone and reconnect to the home AP. the communication remains stable and I can cast and control chromecasts with no issues!
This may help someone in the future.

I am inexperienced in networking and routing, therefore, this may be harder than usual for me!

I'd love to be able to isolate these devices from my home network if possible.

Is there a tutorial that I can follow?
 
drtik
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Re: Chromecast is not discoverable on second AP

Sun Nov 10, 2019 9:08 pm

Just to update you guys, I've submitted a support request to mikrotik and hoping be to get some support and post it here
Fingers crossed

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