User Guide

NETNode Operations Guide
Commercial in
Confidence
IP Mesh Systems
000-130
R1.8 2015-07-24
Commercial in
Confidence
Page 2-41
Note: Stripping will block non VLAN traffic on that port. Priority is required but currently is
not implemented in the mesh system.
Using VLAN Stripping 2.12.4
VLAN stripping allows a NETNode to pass its data over an IP backbone without interference
to other traffic on the network. It also has the potential to let multiple NETNodes on the
same mesh network to connect to the same IP infrastructure.
CAUTION: Changing the Mode of an Ethernet port to VLAN can cause temporary collapse to
the IP network the NETNode is connected to, if done incorrectly. A good understanding of
the network topology is required before implementing VLAN on a mesh system.
Note: Some units may have Ethernet port numbers reversed. Check which port is connected
by looking at the Ethn Link Status. If control of unit is lost, connect to other port and wait
30 seconds or repower unit.
LAN traffic only 2.12.5
This is selected by Global Settings Ethn Mode LAN traffic only.
This allows LAN traffic (and the management interface) through, and blocks any VLAN traffic
from the port. This mode is useful for isolation.
VLAN traffic only 2.12.6
This is selected by Global Settings Ethn Mode VLAN traffic only.
This allows all VLAN traffic through, and blocks any LAN traffic from the port. No tags are
added or removed. This mode is useful for isolation.
Tagged VLAN only 2.12.7
This is selected by Global Settings Ethn Mode Tagged VLAN only.
This allows VLAN traffic with the tag set by the Ethn through, and blocks any other traffic
(LAN and VLAN) from that port. No tags are added or removed. This mode is useful for
isolation.
About Disable Mode 2.12.8
This disables the external port and is useful for security.
2.13 Port Blocking (V5.4 onwards)
To prevent IP loops forming in the Mesh network, each NETNode performs a port blocking
function. Every 2 seconds a broadcast port probe packet (UDP port 29837) is sent out from
each physical port. Each Ethernet interface uses a separate MAC address which is different
to the units’ main MAC address so as not to confuse switched hubs or routers. The UDP