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7-6
Cisco Wireless Router and HWIC Configuration Guide
OL-6415-03
Chapter 7 Configuring QoS on an Access Point
Configuration Guidelines
Ethernet Interface Transmit Queue
Since the Ethernet interface always has a larger bandwidth than radio interface, there is no need to
maintain priority queues for Ethernet interface. There will be only one transmit queue per Ethernet
interface.
802.1Q Untagged Voice Packets
If VLAN is enabled, IOS bridging code adds 802.11q tags into the untagged voice packets. The class of
service (CoS) value should be part of the VLAN configuration. For a voice VLAN, the CoS should be
(6).
If VLAN is not enabled, the access point relies on the DSCP-to-COS filter configured by the user to
assign CoS value to the packet.
QoS on VLAN
The default cos value for all the VLANs is zero (best effort). This ensures that the access point provides
differentiate services based on VLAN IDs. Packets sends to these clients are queued into the appropriate
priority queue based on their VLAN CoS value.
If VLAN is enabled, packets from a wireless client that must be forwarded to the wired network, a 802.1q
tag is added by the forwarding module.
Access Control Lists
Table 7-4 shows the access control list number used to support access control features.
Table 7-4 Access Control List Numbers
ACL number Usage
1 - 99 IP standard access list
Allow or deny packet forwarding based on IP source or destination addresses
100 - 199 IP extended access list
Allow or deny packet forwarding based on IP protocols and/or protocol port
numbers
1100 -1199 Extended MAC address access list
Allow or deny packet forwarding based on ethernet packet MAC addresses, and/or
packets payload values on a given offset location and number of bytes extended
1300 - 1999 IP standard access list (expanded range)
Allow or deny packet forwarding based on IP source or destination addresses
2000 - 2699 IP extended access list (expanded range)
Allow or deny packet forwarding based on IP source or destination addresses