User guide

SM Membership in VLANs Engineering VLANs
168
pmp-0229 (Mar 2013)
SM Membership in VLANs
With the supported VLAN functionality, the radios determine bridge forwarding on the basis of not
only the destination MAC address, but also the VLAN ID of the destination. This provides flexibility
in how SMs are used:
• 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 modules provide the VLAN frame filters that are described in Table 41.
Table 41: 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