3Com WX2200 3CRWX220095A Switch User Manual

WMM QoS Mode 341
Broadcast Control You also can enhance bandwidth availability on an SSID by enabling the
following broadcast control features:
Proxy ARP—WX responds on behalf of wireless clients to ARP requests
for their IP addresses.
DHCP Restrict—WX captures and does not forward any traffic except
DHCP traffic for a wireless client who is still being authenticated and
No Broadcast—Sends unicasts to clients for ARP requests and DHCP
Offers and Acks instead of forwarding them as multicasts.
All these broadcast control options are disabled by default.
(To enable broadcast control features, see “Enabling Broadcast Control”
on page 345.)
Static CoS You can configure MSS to mark all wireless traffic on an SSID with a
specific CoS value. When static CoS is enabled, the MAP marks all traffic
between clients and the WX for a given SSID with the static CoS value.
The static CoS value must be configured on the SSID’s service profile.
Static CoS is the simplest method of CoS marking to configure. However,
the static CoS value applies to all traffic regardless of traffic type. To
instead assign CoS based on specific traffic types within an SSID, use an
ACL. (See “Overriding CoS”.)
When static CoS is enabled, you cannot override the static CoS value by
using ACLs to mark CoS.
Overriding CoS You can configure an ACL that marks packets that match the ACL with a
specific CoS value. CoS is not changed in packets that do not match the
ACE (ACL rule) that sets the CoS. (For more information, see “Enabling
Prioritization for Legacy Voice over IP” on page 401.)
If static CoS is enabled, the static CoS value is always used. The CoS
cannot be changed using an ACL.