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dynek
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Bonjour multicast - How to do it with VLANs ?

Thu Apr 03, 2014 1:23 am

Hello All,

I have tried tons of different things to have Bonjour multicast go through my VLANs with absolutely no success.
How should I proceed: PIM or IGMP proxy ?

I tried to go with PIM and declared two interfaces:
- One is a bridge between a vlan interface and a virtual interface used in MetaRouter
- The other one is a vlan interface

I then configured RP in one of the VLAN's router address (tried both router's IP) - zero result, even after adding prerouting mangle rule to increase TTL

ros code

[admin@Router] > /routing pim interface print detail 
Flags: X - disabled, I - inactive, D - dynamic, R - designated-router, v1 - IGMPv1, v2 - IGMPv2, v3 - IGMPv3 
 0  Rv2 interface=VLAN100 & OpenWRT protocols=pim,igmp preferred-source-address=0.0.0.0 dr-priority=1 hello-period=30s hello-trigerred-delay=5s hello-holdtime=1m45s 
        propagation-delay=50 override-interval=250 tracking-support=yes require-hello=yes join-prune-period=1m join-prune-holdtime=3m30s assert-time=3m assert-override-interval=3s 
        alternative-subnets="" igmp-version=IGMPv2 

 1  Rv2 interface=vlan200-private protocols=pim,igmp preferred-source-address=0.0.0.0 dr-priority=1 hello-period=30s hello-trigerred-delay=5s hello-holdtime=1m45s propagation-delay=50 
        override-interval=250 tracking-support=yes require-hello=yes join-prune-period=1m join-prune-holdtime=3m30s assert-time=3m assert-override-interval=3s alternative-subnets="" 
        igmp-version=IGMPv2 

 2 DR   interface=register protocols=pim dr-priority=1 hello-period=30s hello-trigerred-delay=5s hello-holdtime=1m45s propagation-delay=50 override-interval=250 tracking-support=yes 
        require-hello=yes join-prune-period=1m join-prune-holdtime=3m30s assert-time=3m assert-override-interval=3s alternative-subnets=""

ros code

[admin@Router] > /routing pim join print detail
Flags: RP - (*,*,RP), WC - (*,G), SG - (S,G), SG_rpt - (S,G,rpt) 
     WC group=224.0.0.0 source=10.1.0.1 rp=10.1.0.1 upsteam-interface-rp=register join-state=not-joined i-am-designated-router=VLAN100 & OpenWRT,vlan200-private joined-rp="" 
         joined="" pruned="" prune-pending="" could-assert-wc="" immediate-rp="" immediate-sg-rpt="" 

     SG group=239.255.255.250 source=0.0.0.0 rp=10.1.0.1 upsteam-interface-rp=register join-state=joined timeout=53s local-receivers=VLAN100 & OpenWRT 
         i-am-designated-router=VLAN100 & OpenWRT,vlan200-private joined-rp="" joined-wc="" joined="" pruned="" prune-pending="" assert-winner=VLAN100 & OpenWRT assert-loser=""
         assert-winner-wc=VLAN100 & OpenWRT assert-loser-wc="" assert-tracking-wc=VLAN100 & OpenWRT could-assert-wc=VLAN100 & OpenWRT immediate-rp="" immediate-wc=VLAN100 & Ope
         immediate-sg-rpt=VLAN100 & OpenWRT include-wc=VLAN100 & OpenWRT 

 SG_rpt group=239.255.255.250 source=10.1.0.30 rp=10.1.0.1 upsteam-interface-src=VLAN100 & OpenWRT upsteam-interface-rp=register join-state=joined join-register-state=unknown 
         timeout=9s keepalive-timer=yes local-receivers=VLAN100 & OpenWRT i-am-designated-router=VLAN100 & OpenWRT,vlan200-private joined-rp="" joined-wc="" joined="" pruned=""
         prune-pending="" assert-winner="" assert-loser="" assert-winner-wc=VLAN100 & OpenWRT assert-loser-wc="" could-assert-wc=VLAN100 & OpenWRT immediate-rp="" 
         immediate-wc=VLAN100 & OpenWRT immediate-sg="" immediate-sg-rpt=VLAN100 & OpenWRT include-wc=VLAN100 & OpenWRT

ros code

[admin@Router] > /routing pim mfc print detail  
 group=239.255.255.250 source=10.1.0.30 rp=10.1.0.1 upstream-interface=VLAN100 & OpenWRT downstream-interfaces="
No downstream interface ?

ros code

[admin@Router] > /routing pim rp print detail 
Flags: D - dynamic, X - disabled 
 0    address=10.1.0.1 type=static group=224.0.0.0/4 priority=192 hash-mask-length=30 active-groups=1
Any help will be appreciated.

Thank you
 
efaden
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Re: Bonjour multicast - How to do it with VLANs ?

Thu Apr 03, 2014 7:13 pm

Hello All,

I have tried tons of different things to have Bonjour multicast go through my VLANs with absolutely no success.
How should I proceed: PIM or IGMP proxy ?

I tried to go with PIM and declared two interfaces:
- One is a bridge between a vlan interface and a virtual interface used in MetaRouter
- The other one is a vlan interface

I then configured RP in one of the VLAN's router address (tried both router's IP) - zero result, even after adding prerouting mangle rule to increase TTL

ros code

[admin@Router] > /routing pim interface print detail 
Flags: X - disabled, I - inactive, D - dynamic, R - designated-router, v1 - IGMPv1, v2 - IGMPv2, v3 - IGMPv3 
 0  Rv2 interface=VLAN100 & OpenWRT protocols=pim,igmp preferred-source-address=0.0.0.0 dr-priority=1 hello-period=30s hello-trigerred-delay=5s hello-holdtime=1m45s 
        propagation-delay=50 override-interval=250 tracking-support=yes require-hello=yes join-prune-period=1m join-prune-holdtime=3m30s assert-time=3m assert-override-interval=3s 
        alternative-subnets="" igmp-version=IGMPv2 

 1  Rv2 interface=vlan200-private protocols=pim,igmp preferred-source-address=0.0.0.0 dr-priority=1 hello-period=30s hello-trigerred-delay=5s hello-holdtime=1m45s propagation-delay=50 
        override-interval=250 tracking-support=yes require-hello=yes join-prune-period=1m join-prune-holdtime=3m30s assert-time=3m assert-override-interval=3s alternative-subnets="" 
        igmp-version=IGMPv2 

 2 DR   interface=register protocols=pim dr-priority=1 hello-period=30s hello-trigerred-delay=5s hello-holdtime=1m45s propagation-delay=50 override-interval=250 tracking-support=yes 
        require-hello=yes join-prune-period=1m join-prune-holdtime=3m30s assert-time=3m assert-override-interval=3s alternative-subnets=""

ros code

[admin@Router] > /routing pim join print detail
Flags: RP - (*,*,RP), WC - (*,G), SG - (S,G), SG_rpt - (S,G,rpt) 
     WC group=224.0.0.0 source=10.1.0.1 rp=10.1.0.1 upsteam-interface-rp=register join-state=not-joined i-am-designated-router=VLAN100 & OpenWRT,vlan200-private joined-rp="" 
         joined="" pruned="" prune-pending="" could-assert-wc="" immediate-rp="" immediate-sg-rpt="" 

     SG group=239.255.255.250 source=0.0.0.0 rp=10.1.0.1 upsteam-interface-rp=register join-state=joined timeout=53s local-receivers=VLAN100 & OpenWRT 
         i-am-designated-router=VLAN100 & OpenWRT,vlan200-private joined-rp="" joined-wc="" joined="" pruned="" prune-pending="" assert-winner=VLAN100 & OpenWRT assert-loser=""
         assert-winner-wc=VLAN100 & OpenWRT assert-loser-wc="" assert-tracking-wc=VLAN100 & OpenWRT could-assert-wc=VLAN100 & OpenWRT immediate-rp="" immediate-wc=VLAN100 & Ope
         immediate-sg-rpt=VLAN100 & OpenWRT include-wc=VLAN100 & OpenWRT 

 SG_rpt group=239.255.255.250 source=10.1.0.30 rp=10.1.0.1 upsteam-interface-src=VLAN100 & OpenWRT upsteam-interface-rp=register join-state=joined join-register-state=unknown 
         timeout=9s keepalive-timer=yes local-receivers=VLAN100 & OpenWRT i-am-designated-router=VLAN100 & OpenWRT,vlan200-private joined-rp="" joined-wc="" joined="" pruned=""
         prune-pending="" assert-winner="" assert-loser="" assert-winner-wc=VLAN100 & OpenWRT assert-loser-wc="" could-assert-wc=VLAN100 & OpenWRT immediate-rp="" 
         immediate-wc=VLAN100 & OpenWRT immediate-sg="" immediate-sg-rpt=VLAN100 & OpenWRT include-wc=VLAN100 & OpenWRT

ros code

[admin@Router] > /routing pim mfc print detail  
 group=239.255.255.250 source=10.1.0.30 rp=10.1.0.1 upstream-interface=VLAN100 & OpenWRT downstream-interfaces="
No downstream interface ?

ros code

[admin@Router] > /routing pim rp print detail 
Flags: D - dynamic, X - disabled 
 0    address=10.1.0.1 type=static group=224.0.0.0/4 priority=192 hash-mask-length=30 active-groups=1
Any help will be appreciated.

Thank you

Curious myself.
 
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dynek
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Re: Bonjour multicast - How to do it with VLANs ?

Wed Apr 30, 2014 11:16 am

As it's been almost a month now that I'm trying to have this setup working I guess I have gone the wrong way.
Most likely I didn't understand what PIM / IGMP Proxy should be used for and I'm looking for something else.

Is there a component in RouterOS that I can use to have multicast frames (be it Bonjour or VLC multicast) replicated from a subnet to another one ?

Thank you
 
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Re: Bonjour multicast - How to do it with VLANs ?

Wed Apr 30, 2014 12:29 pm

Can you see any IGMP joins on vlan200-private interface?
 
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Re: Bonjour multicast - How to do it with VLANs ?

Wed Apr 30, 2014 12:50 pm

As far as I remember, I never saw any machine from 10.2.0.0/24 network (vlan200) appears in Joins tab.
Should they land here when checking for a Bonjour printer for instance ?

I can see some groups related to vlan200 though in IGMP Groups but all of them have state saying exclude (even in vlan100 btw).
 
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Re: Bonjour multicast - How to do it with VLANs ?

Wed Apr 30, 2014 1:16 pm

Post your igmp-group print detail.
 
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dynek
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Re: Bonjour multicast - How to do it with VLANs ?

Wed Apr 30, 2014 10:33 pm

230.255.2.1 being a stream I'm multicasting over udp using VLC

ros code

[admin@Router] /routing pim> mfc pr de
 group=230.255.2.1 source=10.1.0.125 rp=10.2.0.1 upstream-interface=vlan100-management downstream-interfaces="" 

 group=239.255.255.250 source=10.1.0.30 rp=10.2.0.1 upstream-interface=vlan100-management downstream-interfaces=""

ros code

[admin@Router] /routing pim> igmp-group pr de
Flags: v1 - IGMPv1, v2 - IGMPv2, v3 - IGMPv3, I - include, E - exclude, F - forward, D - don't forward 
 v2E interface=vlan100-management group=224.0.0.2 source=0.0.0.0 last-reported=10.1.0.1 timeout=3m38s 

 v2E interface=vlan100-management group=224.0.0.13 source=0.0.0.0 last-reported=10.1.0.1 timeout=3m40s 

 v2E interface=vlan100-management group=224.0.0.22 source=0.0.0.0 last-reported=10.1.0.1 timeout=3m35s 

 v2E interface=vlan100-management group=239.255.255.250 source=0.0.0.0 last-reported=10.1.0.50 timeout=3m34s 

 v2E interface=vlan200-private group=224.0.0.2 source=0.0.0.0 last-reported=10.2.0.1 timeout=3m38s 

 v2E interface=vlan200-private group=224.0.0.13 source=0.0.0.0 last-reported=10.2.0.1 timeout=3m40s 

 v2E interface=vlan200-private group=224.0.0.22 source=0.0.0.0 last-reported=10.2.0.1 timeout=3m35s

ros code

[admin@Router] /routing pim> join pr de
Flags: RP - (*,*,RP), WC - (*,G), SG - (S,G), SG_rpt - (S,G,rpt) 
     WC group=224.0.0.0 source=10.2.0.1 rp=10.2.0.1 upsteam-interface-rp=register join-state=not-joined i-am-designated-router=vlan100-management,vlan200-private 
         joined-rp="" joined="" pruned="" prune-pending="" could-assert-wc="" immediate-rp="" immediate-sg-rpt="" 

     SG group=239.255.255.250 source=0.0.0.0 rp=10.2.0.1 upsteam-interface-rp=register join-state=joined timeout=1s local-receivers=vlan100-management 
         i-am-designated-router=vlan100-management,vlan200-private joined-rp="" joined-wc="" joined="" pruned="" prune-pending="" assert-winner=vlan100-management 
         assert-loser="" assert-winner-wc=vlan100-management assert-loser-wc="" assert-tracking-wc=vlan100-management could-assert-wc=vlan100-management 
         immediate-rp="" immediate-wc=vlan100-management immediate-sg-rpt=vlan100-management include-wc=vlan100-management 

 SG_rpt group=230.255.2.1 source=10.1.0.125 rp=10.2.0.1 upsteam-interface-src=vlan100-management upsteam-interface-rp=register join-state=not-joined 
         join-register-state=unknown keepalive-timer=yes local-receivers="" i-am-designated-router=vlan100-management,vlan200-private joined-rp="" joined-wc="" 
         joined="" pruned="" prune-pending="" assert-winner="" assert-loser="" assert-winner-wc="" assert-loser-wc="" could-assert-wc="" immediate-rp="" 
         immediate-wc="" immediate-sg="" immediate-sg-rpt="" include-wc="" 

 SG_rpt group=239.255.255.250 source=10.1.0.30 rp=10.2.0.1 upsteam-interface-src=vlan100-management upsteam-interface-rp=register join-state=joined 
         join-register-state=unknown timeout=1s keepalive-timer=yes local-receivers=vlan100-management i-am-designated-router=vlan100-management,vlan200-private 
         joined-rp="" joined-wc="" joined="" pruned="" prune-pending="" assert-winner="" assert-loser="" assert-winner-wc=vlan100-management assert-loser-wc="" 
         could-assert-wc=vlan100-management immediate-rp="" immediate-wc=vlan100-management immediate-sg="" immediate-sg-rpt=vlan100-management 
         include-wc=vlan100-management
 
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dynek
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Re: Bonjour multicast - How to do it with VLANs ?

Thu May 01, 2014 11:34 pm

Once more, as it's been a month now that I'm trying to have this setup working I guess I have gone the wrong way.
Most likely I don't understand what PIM / IGMP Proxy should be used for and I'm looking for something else.

Is there a component in RouterOS that I can use to have Bonjour frames replicated from a subnet to another one ?

Thank you
 
jkarras
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Re: Bonjour multicast - How to do it with VLANs ?

Fri May 02, 2014 1:37 am

PIM is the correct mechanism to get multicast traffic from one L3 interface to another in a routed network. I am less familiar with Multicast on Mikrotik but I have a couple of questions.

Do you have any firewall rules on these interfaces?

Can you confirm that a device on VLAN 200 can connect to your server device on VLAN 100 via unicast (ping etc...). Multicast relies on the unicast routing table to build its table to send multicast traffic to clients. So if traditional unicast routing isn't working multicast will not work.

The other thing I don't see here is any IGMP joins by clients on VLAN 200. Multicast traffic will not be sent to VLAN 200 unless a client has requested a join.

IGMP is the L2 mechanism for a client to request a multicast stream. Routers listen for such requests and translate that into PIM join messages to the peer routers and ultimately to the RP if no route is in the MFC already.
 
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dynek
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Re: Bonjour multicast - How to do it with VLANs ?

Fri May 02, 2014 9:18 am

Hello jkarras and thank you for your answer!
Do you have any firewall rules on these interfaces?
I have the default rules that come with RouterOS. So no rule specific to the VLANs.
Can you confirm that a device on VLAN 200 can connect to your server device on VLAN 100 via unicast (ping etc...).
Yes definitely. One of the device is a NAS and I'm able to connect using AFP. All the traffic between VLAN 100 and 200 is free to go.
Ping also works.
The other thing I don't see here is any IGMP joins by clients on VLAN 200. Multicast traffic will not be sent to VLAN 200 unless a client has requested a join.
Yes, looks to be the thing. When should machines in VLAN 200 join anything ? They should join just because Bonjour client is running ?
IGMP is the L2 mechanism for a client to request a multicast stream. Routers listen for such requests and translate that into PIM join messages to the peer routers and ultimately to the RP if no route is in the MFC already.
My setup is very simple. Both VLANs are declared on the Mikrotik and data don't have to reach another router.
Is it correct then to declare vlan100 and 200 in PIM interfaces (register interface shows up) and declare RP on either vlan100/200 local IP address ?
I have not done anything else in PIM config.

Thank you
 
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Re: Bonjour multicast - How to do it with VLANs ?

Sat May 03, 2014 8:11 am

Before going too much further I should note that Bonjour is designed to not be routed. It uses the 224.0.0.0/24 multicast range which is link-local only. That said if you still want to get PIM routing working it would be best to test your setup with some other protocol. So assuming the stream your talking about is originating from say VLC and being consumed by VLC you should be good. If your expecting to have a Bonjour device advertise a service on VLAN 100 and have a client pickup that mDNS advertisement and connect to the stream(even though the stream is not on 224.0.0.0/24) on VLAN 200 it will not work.

To get mDNS traffic to pass through routed barriers you will need a mDNS reflector/replicator such as Avahi.

With that in mind my answers are below.
The other thing I don't see here is any IGMP joins by clients on VLAN 200. Multicast traffic will not be sent to VLAN 200 unless a client has requested a join.
Yes, looks to be the thing. When should machines in VLAN 200 join anything? They should join just because Bonjour client is running?
A client will send a IGMP join request when a application such as the Bonjour client wants to request access to a multicast stream. Think of IGMP as the ARP of multicast. It lets the router (as well as switches with IGMP snooping) know the client is requesting a stream. From my experience with a IPTV system run at my place of employment. Windows firewall as well as others is good a blocking multicast in some default configurations. You should test by turning off any client side firewalls and see if that makes a difference. In your previous IGMP-group print out I didn't see any Bonjour advertisements or join requests.
IGMP is the L2 mechanism for a client to request a multicast stream. Routers listen for such requests and translate that into PIM join messages to the peer routers and ultimately to the RP if no route is in the MFC already.
My setup is very simple. Both VLANs are declared on the Mikrotik and data don't have to reach another router.
Is it correct then to declare vlan100 and 200 in PIM interfaces (register interface shows up) and declare RP on either vlan100/200 local IP address ?
I have not done anything else in PIM config.
Both interfaces should be declared in PIM. Some devices have the concept of a PIM passive mode which is similar to passive in OSPF. The router ignores certain PIM messages that only a router should send. Thus you enable PIM passive on client facing networks. I don't know that Mikrotik has this functionality though. One thing you may try is enabling IGMPv3 instead of the default v2. You should sniff the traffic on your vlan200 and see if the Mikrotik is seeing the IGMP joins. Will you paste an updated IGMP group list while running your stream and client.

Also it should be noted that even though your server is offering a stream and publishing it via Bonjour it doesn't mean your client is going to registe
 
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Re: Bonjour multicast - How to do it with VLANs ?

Mon May 12, 2014 3:24 pm

Thank you for your answer.

I gave up and I am now running a Raspberry listening and advertising mDNS on both VLANs. Too bad Mikrotik / RouterOS can't do it.

Thanks again.
 
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Re: Bonjour multicast - How to do it with VLANs ?

Fri Oct 26, 2018 2:22 am

Any built-in solution now?
 
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Re: Bonjour multicast - How to do it with VLANs ?

Fri Jan 10, 2020 12:14 pm

Is there a solution now? Jan 2020.
 
drtik
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Re: Bonjour multicast - How to do it with VLANs ?

Sun Mar 22, 2020 10:45 am

I've looked around the internet and I can't find a tutorial on how to implement mdns/multicast across vlans/subnets/bridges!
Solutions like unifi can implement this with couple of rules and buttons, see this;
https://youtu.be/p3SfeQTaaxw

Why can't we have solutions like this?
At least one of mikrotik experts could put an easy to follow solution to help non experts.
The wiki page on mdns could be updated.
Come on guys!
 
sydsyd
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Re: Bonjour multicast - How to do it with VLANs ?

Sun Mar 22, 2020 12:20 pm

I've looked around the internet and I can't find a tutorial on how to implement mdns/multicast across vlans/subnets/bridges!
Solutions like unifi can implement this with couple of rules and buttons, see this;
https://youtu.be/p3SfeQTaaxw
Agree. I actually gave up and bought a Unifi Dream Machine and now have it working across 4 VLANs.
 
drtik
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Re: Bonjour multicast - How to do it with VLANs ?

Sun Mar 22, 2020 11:42 pm

I've looked around the internet and I can't find a tutorial on how to implement mdns/multicast across vlans/subnets/bridges!
Solutions like unifi can implement this with couple of rules and buttons, see this;
https://youtu.be/p3SfeQTaaxw
Agree. I actually gave up and bought a Unifi Dream Machine and now have it working across 4 VLANs.
Yea man, I've just returned it yesterday, the wireless signal was unstable, may be just my machine :(
That's been said, the mdns implementation is amazing
 
sydsyd
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Re: Bonjour multicast - How to do it with VLANs ?

Mon Mar 23, 2020 12:14 am

Yea man, I've just returned it yesterday, the wireless signal was unstable, may be just my machine :(
That's been said, the mdns implementation is amazing
What are you using instead to implement VLANs?
 
drtik
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Re: Bonjour multicast - How to do it with VLANs ?

Tue Mar 24, 2020 9:56 am

Yea man, I've just returned it yesterday, the wireless signal was unstable, may be just my machine :(
That's been said, the mdns implementation is amazing
What are you using instead to implement VLANs?
After returning UDM, went back to mikrotik.
Now I'm thinking of going pfsense or ubiquiti again! This time of I go with unifi, I may need to build components.
Not sure.
IF only mikrotik implement easier mdns and possibly ips, they'll be unstoppable!
How happy are you with UDM?
 
sydsyd
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Re: Bonjour multicast - How to do it with VLANs ?

Tue Mar 24, 2020 2:03 pm

...
How happy are you with UDM?
Very happy. If all you need is a single AP, it basically combines the USG, switch and AP into one.
Bonjour across VLANs work fine, but I can't get my HDHomerun TV tuner to work with the HDHomerun App. It uses some funky mDNS magic. It works with other PVR apps though, so I have a workaround.
 
drtik
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Re: Bonjour multicast - How to do it with VLANs ?

Tue Mar 24, 2020 6:54 pm

...
How happy are you with UDM?
Very happy. If all you need is a single AP, it basically combines the USG, switch and AP into one.
Bonjour across VLANs work fine, but I can't get my HDHomerun TV tuner to work with the HDHomerun App. It uses some funky mDNS magic. It works with other PVR apps though, so I have a workaround.
Good for you my friend, bad for mikrotik. They just lost costumer !
 
sydsyd
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Re: Bonjour multicast - How to do it with VLANs ?

Wed Mar 25, 2020 3:32 am

...
Bonjour across VLANs work fine, but I can't get my HDHomerun TV tuner to work with the HDHomerun App. ...
Just a quick update. I've solved the HDHomeRun issue by having a Raspberry Pi that's connected to the VLAN that the HDHomerun is on, and the VLAN that the clients are on and running an app called Socat. See more in this discussion:
https://community.ui.com/questions/Howt ... ee6f43db8f

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