Bridge GUI Guide: Network Configuration
108
WMM is enabled by default on new BSSs (refer to Section
3.3.4.7).
Wireless packets can convey QoS priority tags directly in their
802.11 headers. When no VLAN tags are present, the Bridge
sorts wireless traffic into QoS priority queues according to
these tags. If a wireless packet also contains a VLAN tag, the
Bridge applies the user-priority tag conveyed in the VLAN tag,
rather than in the 802.11 header.
On ES210 Bridges in
Station Mode
(refer to Section 3.3.5),
WMM is also enabled by default on new
STA Interfaces
(as
described in Section 3.3.5.5).
Priority Tag-to-Queue Mapping
By default, 802.1p user-priority values are mapped to priority
queues according to IEEE standard 802.1D, MAC Bridges,
Annex G:
Critical
- packets are delivered ahead of all other QoS levels.
WMM categorizes this level of service as
Voice
. The IEEE
specification recommends
Critical
QoS for traffic tagged with
802.1p user-priority values 6 and 7.
High
- packets are delivered after
Critical
and ahead of lower
QoS levels. WMM categorizes this level of service as
Video
.
IEEE recommends
High
QoS for traffic tagged with user-priority
values 4 and 5.
Medium
- is
Best Effort
delivery: packets are delivered after
higher QoS levels, but ahead of
Low
priority traffic. IEEE
recommends
Medium
QoS for traffic tagged with user-priority
values 0 (zero) and 3 and for untagged traffic.
Low
- is for
Background
traffic: packets are delivered after all
other QoS levels. IEEE recommends
Low
QoS for traffic
tagged with user-priority values 1 and 2.
Packets received with no priority information and not subject to
an Ethernet-port QoS override are sorted into the
Medium
QoS
priority queue.
You can disable QoS on the Bridge by assigning all eight
802.1p tags to the same priority level.
You can configure Ethernet Quality of Service only in Advanced
View
Figure 3.31. Advanced View
802.1p QoS Tag Priorities
frame, all platforms