Chapter 3: System planning
Data network planning
Page
3-43
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Each SM can be a member in its own VLAN.
•
Each SM can be in its own broadcast domain, such that only the radios that are members of the
VLAN can see broadcast and multicast traffic to and from the SM.
•
The network operator can define a work group of SMs, regardless of the AP(s) to which they
register.
PMP 450 Platform Family modules provide the VLAN frame filters that are described in
Table 89 VLAN filters in point-to-multipoint modules
Where VLAN is active,
if this parameter value
is selected …
then a frame is discarded if…
because of this VLAN
filter in the software:
entering the bridge/
NAT switch through…
Ethernet…
TCP/IP…
any combination of VLAN
parameter settings
with a VID not in the
membership table
Ingress
any combination of VLAN
parameter settings
with a VID not in the
membership table
Local Ingress
Allow Frame Types:
Tagged Frames Only
with no 802.1Q tag
Only Tagged
Allow Frame Types:
Untagged Frames Only
with an 802.1Q tag,
regardless of VID
Only Untagged
Local SM Management:
Disable in the SM, or
All Local SM Management:
Disable in the AP
with an 802.1Q tag
and a VID in the
membership table
Local SM Management
leaving the bridge/
NAT switch through…
Ethernet…
TCP/IP…
any combination of VLAN
parameter settings
with a VID not in the
membership table
Egress
any combination of VLAN
parameter settings
with a VID not in the
membership table
Local Egress
Priority on VLANs (802.1p)
The radios can prioritize traffic based on the eight priorities described in the IEEE 802.1p specification.
When the high-priority channel is enabled on a SM, regardless of whether VLAN is enabled on the AP
for the sector, packets received with a priority of 4 through 7 in the 802.1p field are forwarded onto the
high-priority channel.
For example, when the high priority and low priority channels are enabled on an SM, medium and ultra
high priority channels are disabled.
