RAVENNA Networking Guide
V1.0/3
5
Data Network Requirements
Data Network Requirements
RAVENNA streaming requires proper configuration and management of the data network. This means that all
network components (routers and switches) must support the following requirements. All are common data
networking features. However, they are not supported by every network switch.
Please
DO NOT
attempt to connect RAVENNA streaming nodes using an unknown or unqualifying IP network. If
you do so, correct streaming operation cannot be guaranteed.
Essential Requirements
To qualify for RAVENNA streaming, all network components
MUST
support:
·
Multicast addressing
- as opposed to unicast, with:
o
IGMPv2 Snooping
- with an active Querier. Fast/Immediate Leave is also highly recommended.
o
Port Filtering
- streaming ports must be open to Avahi/Bonjour and Ember+ services (to allow for
automatic node detection and stream announcement).
·
IPv4
protocol - as opposed to IPv6.
·
QoS
- the use of DSCP values, otherwise known as Diffserv, is highly recommended. In Lawo's
RAVENNA devices, the following DSCP values are implemented:
o
DSCP 56 (C7) = PTP clock signals.
o
DSCP 46 (EF) = RAVENNA media streams.
o
DSCP 0 (BE) = all other network traffic.
·
No Green Ethernet/EEE/Power Saving
- any Energy Efficient Ethernet (EEE), Green Ethernet or power
saving features must be disabled, as these can interfere with RAVENNA's clock signals and real-time
buffering.
·
No Jumbo Frames
- any options for Jumbo Frames should be disabled.
·
PTP
- for
mc
2
/Nova73
installations, Synchronization requires a PTP master clock source. As a result, all
network components must be PTP-aware.
When configuring the network, it is also important that all streaming nodes reside within a single broadcast
domain (i.e. within the same IP address range and subnet). This is necessary to support automatic stream
announcement.
Recommendations
The following are also highly recommended:
·
Switch Configuration
- a managed switch will allow you to easily monitor and adjust settings such as
the
IGMP
,
QoS
and
Port filtering
features described above.
·
Gigabit Ethernet
- a Gigabit Ethernet switch operating at 1000 Mbit/s will significantly improve the
network's bandwidth and performance when compared to Fast Ethernet (100 Mbit/s) or Standard Ethernet
(10 Mbit/s).
·
No Network Address Translation (NAT) or Firewalls
- NAT and Firewalls should be avoided as they
can result in long and unpredictable delays.
