What is Bonjour?
Bonjour is a technology that allows network services to be detected automa=
tically on IP networks. It is an Apple implementation of the zeroconf syste=
m.
Bonjour implements multicast DNS (mDNS), DNS-SD and IPv4LL. Developed by A=
pple, mDNS and DNS-SD were released for recognition as open standards. <=
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Among other things, iTunes uses the Bonjour technology to automatically fi=
nd other computers that share their music. Also using the Bonjour technolog=
y are the Apple products AirPlay and AirPrint.
How is Bonjour=
operated on a local network with LANCOM routers up to LCOS 9.24? Up to LCOS 9.24 all of the devices need to be in the same (V)LAN. =
Implementing cross-network communications requires you to use an mDNS proxy. This, however, is not implemented in the current version o=
f LCOS.
Routing is not possible, as this is prohibited for th=
e IPv4 multicast address (224.0.0.251 from the local network control block)=
, and IPv6 packets are already assigned a link local source address (ff02::=
fb).
Starting with LCOS version 10.00, a Bonjour proxy is =
included in the firmware. The Bonjour proxy allows the Bonjour protocol=
to operate across layer-2 boundaries. In this way you can implement ZeroCo=
nf services even in scenarios that operate with network virtualization (ARF=
).
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