User's Manual

NETNode
Phase 1 and 2 Units
NETNode
User Manual
NETNode-V2.3
7-79
DS000034 Unclassified
normal into the radio and indeed send data over the radio network on the same IP address
range as the radio IP addresses. Port 2 is configured to support a VLAN with a Tag of 1531.
7.2.1. VLAN tagging
VLAN tagging adds the VLAN tag as the packet enters Netnode the port and removes it again
when a VLAN packet of the correct tag exits. Only VLAN packets with the correct tag will exit
the port. This is selected by GlobalSettings->Ethx Mode->LAN<->VLAN. The tag number
and priority must also be specified.
7.2.1.1. Use of VLAN tagging
Suppose the system administrator wishes a camera to be connected to each NetNode, but
each on a separate network so that individual users cannot snoop onto other cameras, or
change the configuration of the Mesh system. Connecting the camera to each Netnode and
setting the Ethernet port using different VLAN tags for each NetNode would allow this. The
endpoint node could pass the VLAN tags unaltered by setting GlobalSettings->Ethx Mode-
>Normal, and programming all 8 VLAN addresses and tags in this node. The endpoint node
could then be connected to an external intelligent router which puts out the separate LAN
networks out on separate ports. In this example the endpoint would typically be at the HQ
building (the command and control centre.)
7.2.2. VLAN stripping
VLAN striping removes the VLAN tag as the packet enters the port and adds it again when
the packet exits. This is selected by GlobalSettings->Ethx Mode->VLAN<->LAN. The tag
number and priority must also be specified. Note stripping will block non VLAN traffic on that
port. Priority is required but currently is not implemented in the mesh system.
7.2.2.1. Use of VLAN stripping
VLAN strpping allows a NetNode to pass its data over a IP backbone without interference to
other traffic on the network. It also has the potential to allow multiple NetNodes on the
same mesh network to connect to the same IP infrastructure.
Note: Changing the Mode of the Ethernet port which you are currently using to control a
Netnode will cause loss of control of the unit. The user may only be able to regain
control using the other Ethernet port or the RS232 interface.