24 • DM NVX System Design Guide – DOC. 7977F
• Use the Active Directory service for administration security:
- Create an Active Directory group responsible for device administration.
- Add device administrators to the group.
- Add the group to the DM NVX device on the Device page of the
web interface.
Use of the Active Directory service with DM NVX endpoint logins allows for easy,
seamless, and better controlled access from a central directory authority with
fewer risks.
• Use a DHCP server with link-layer filtering, and configure the IP addresses of
endpoints using DHCP rather than static IP addresses. Using a DHCP server with
short lease times, MAC address filtering, and sufficient address space for future
needs makes network management easier.
• Enable IGMPv2 (DM NVX default) or IGMPv3 multicast snooping on all switches
in the DM NVX network. This is a requirement for all designs in order to enable
multicast delivery to multiple endpoints. Without IGMP snooping enabled,
switches that receive a multicast stream will transmit that stream to all ports
simultaneously and saturate all network links.
• Use the Rapid Spanning Tree Protocol (RSTP) on the network to ensure that
network loops are discoverable and to prevent deployment issues. Network
management should account for RSTP discovery downtime when the network
changes.
• Use and plan for DM NVX Director management of endpoints.
• Use daisy chaining to connect video wall endpoints or repeated displays.
For video walls or endpoints that receive the same source from a single
transmitter to feed multiple identical displays or in a video wall using a single
source, it is simpler and less expensive to daisy chain the network.
• Disable IGMP proxy functionality on Crestron control processors with routers to
ensure that DM NVX multicast traffic does not interfere with the control
processor. The CP3N, Pro3, and AV3 control processors as well as DMPS3
presentation systems should have IGMP proxy functionality disabled when
connected to the DM NVX network.
• Account for high-bandwidth external USB devices that are to be connected
to DM NVX devices. Ensure that the bandwidth is accounted for as a separate
1-gigabit link since USB 2.0 bandwidth can consume 480 Mbps of the
1-gigabit link.
• Ensure that multicast IP addresses do not share the multicast MAC addresses.
Sharing MAC addresses can cause network collisions and prevent normal
operation of the DM NVX network.
• For Dante and AES67 audio networking with DM-NVX-352 and DM-NVX-352C
devices, additional network considerations may need to be addressed. For
Ethernet switch guidelines, refer to the information provided on the Audinate
website at www.audinate.com/networks-and-switches
.
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