D-Link DWS-1008 Product Manual - Page 210

WMM QoS Mode, WMM QoS on the DWS-1008 Switch

Page 210 highlights

WMM QoS Mode DWS-1008 switches and DWL-8220AP access points each provide classification and marking for WMM QoS: • DWS-1008 switches classify and mark traffic based on 802.1p tag value (for tagged traffic) or Differentiated Services Code Point (DSCP) value. • DWL-8220AP access points classify ingress traffic from wireless clients based on the service type value in the 802.11 header, and mark the DSCP value in the IP tunnel on which the AP forwards the user traffic to the switch. APs place traffic from a switch to a wireless client in a forwarding queue based on the DSCP value in the tunnel carrying the traffic, then forward the traffic based on the queue's priority. WMM QoS on the DWS-1008 Switch MSS performs classification on ingress to determine a packet's CoS value. This CoS value is used to mark the packet at the egress interface. The classification and marking performed by the switch depend on whether the ingress interface has an 802.1p or DSCP value other than 0, and whether the egress interface is tagged or is an IP tunnel. The mappings between DSCP and CoS values are configurable. (See "Changing CoS Mappings".) 802.1p and CoS values map directly and are not configurable. DSCP 0 of the DSCP-to-CoS map is reserved. 802.1p determines CoS for packets with DSCP 0. CoS 0 of the CoS-to-DSCP map is also reserved. CoS 0 packets are marked with DSCP 0. The table below shows how WMM priority information is mapped across the network. When WMM is enabled, D-Link switches and APs perform these mappings automatically. Service IP Type Precedence 0 0 3 3 1 1 2 2 4 4 5 5 6 6 7 7 IP ToS 0 0x60 0x20 0x40 0x80 0xa0 0xc0 0xe0 DSCP 0 24 8 16 32 40 48 56 802.1p 0 3 1 2 4 5 6 7 CoS 0 3 1 2 4 5 6 7 AP Forwarding Queue Background Best Effort Video Voice You can use static CoS to assign the same CoS value to all packets for a specific SSID. The static CoS value is assigned on the AP, in both traffic directions (from the client to the switch and from the switch to the client). You also can use ACLs to override marking for specific packets. Configure ACEs that use the dscp option to match on ingress DSCP value, and use the cos option to mark CoS. A CoS value assigned by an ACE overrides the internal CoS value. D-Link DWS-1008 User Manual 191

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D-Link DWS-1008 User Manual
1·1
WMM QoS Mode
DWS-1008 switches and DWL-8220AP access points each provide classification and marking for WMM
QoS:
• DWS-1008 switches classify and mark traffic based on 802.1p tag value (for tagged traffic)
or Differentiated Services Code Point (DSCP) value.
• DWL-8220AP access points classify ingress traffic from wireless clients based on the
service type value in the 802.11 header, and mark the DSCP value in the IP tunnel on
which the AP forwards the user traffic to the switch.
APs place traffic from a switch to a wireless client in a forwarding queue based on the DSCP value in
the tunnel carrying the traffic, then forward the traffic based on the queue’s priority.
WMM QoS on the DWS-1008 Switch
MSS performs classification on ingress to determine a packet’s CoS value. This CoS value is used to
mark the packet at the egress interface.
The classification and marking performed by the switch depend on whether the ingress interface has an
802.1p or DSCP value other than 0, and whether the egress interface is tagged or is an IP tunnel.
The mappings between DSCP and CoS values are configurable. (See “Changing CoS Mappings”.)
802.1p and CoS values map directly and are not configurable. DSCP 0 of the DSCP-to-CoS map is
reserved. 802.1p determines CoS for packets with DSCP 0. CoS 0 of the CoS-to-DSCP map is also
reserved. CoS 0 packets are marked with DSCP 0.
The table below shows how WMM priority information is mapped across the network. When WMM is
enabled, D-Link switches and APs perform these mappings automatically.
Service IP
IP ToS
DSCP
802.1p
CoS
AP Forwarding
Type
Precedence
Queue
0
0
0
0
0
0
Background
3
3
0x60
24
3
3
1
1
0x20
8
1
1
Best Effort
2
2
0x40
16
2
2
4
4
0x80
32
4
4
Video
5
5
0xa0
40
5
5
6
6
0xc0
48
6
6
Voice
7
7
0xe0
56
7
7
You can use static CoS to assign the same CoS value to all packets for a specific SSID. The static CoS
value is assigned on the AP, in both traffic directions (from the client to the switch and from the switch
to the client).
You also can use ACLs to override marking for specific packets. Configure ACEs that use the dscp
option to match on ingress DSCP value, and use the cos option to mark CoS. A CoS value assigned by
an ACE overrides the internal CoS value.