D-Link DWL-8600AP User Manual page 596

D-Link UWS User Manual
Field
Tunnel IP MTU Size
Cluster Priority
AP Client QoS
TSPEC Violation Report
Interval
Base IP Port
D-Link
Oct. 2015
Table 348: General Global Configurations
Description
Select the maximum size of an IP packet handled by the network. The MTU is
enforced only on tunneled VAPs.
When IP packets are tunneled between the APs and the DWS-4000 Series switch, the
packet size is increased by 20 bytes during transit. This means that clients configured
for 1500 byte IP MTU size may exceed the maximum MTU size of existing network
infrastructure which is set up to switch and route 1518 (1522-tagged) byte frames. If
you increase the tunnel IP MTU size, you must also increase the physical MTU of the
ports on which the traffic flows.
Note: f any of the following conditions are true, you do not need to increase the
tunnel IP MTU size:
• The wireless network does not use L3 tunneling.
• The tunneling mode is used only for voice traffic, which typically has small
packets.
• The tunneling mode is used only for TCP based protocols, such as HTTP. This
is because the AP automatically reduces the maximum segment size for all TCP
connections to fit within the tunnel.
Specify the priority of this switch for the Cluster Controller election.
The switch with highest priority in a cluster becomes the Cluster Controller. If the
priority is the same for all switches, then the switch with lowest IP address becomes
the Cluster Controller. A priority of 0 means that the switch cannot become the
Cluster Controller. The highest possible priority is 255.
Enable or disable the client QoS feature. If AP Client QoS is disabled, the Client QoS
configuration remains in place, but any ACLs or DiffServ policies applied to wireless
traffic are not enforced.
The Client QoS feature extends the primary QoS capabilities of the DWS-4000 Series
switch to the wireless domain. More specifically, access control lists (ACLs) and
differentiated service (DiffServ) policies are applied to wireless clients associated to
the AP.
A TSPEC is a traffic specification that is sent from a QoS-capable wireless client to an
AP requesting a certain amount of network access for the traffic stream (TS) it
represents.
The TSPEC Violation Report Interval specifies the normal frequency with which
wireless clients detected as using admission-controlled resources without proper
TSPEC authorization are reported through system logging and SNMP traps.
If a violating client disassociates before the next reporting interval, it is reported
upon disassociation.
Setting this parameter to 0 disables TSPEC violation reporting.
Sets the first IP port number within the range that the wireless system uses to send
and receive IP traffic.
By default the Wireless system uses the IP ports 57775 to 57784.
If you change the base IP port, the wireless feature is automatically disabled and re-
enabled. The default Wireless IP port is not sent as part of the global switch
configuration in the cluster configuration distribution command, so every switch in
the cluster must be configured independently with the new IP port number.
If the Wireless IP port number is changed from its default value on the switch, then
it must also be changed on the Access Points. The port can be set on the AP via an AP
administrative command, or DHCP option 43, sub-option 3. If the port is set via DHCP
then the DHCP setting supersedes the configured setting.
Configuring Advanced Settings
Unified Wired and Wireless Access System
Page 596