Ethernet Interface Transmit Queue

Chapter 7 Configuring QoS on an Access Point

Configuration Guidelines

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 7-4shows 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

Cisco Wireless Router and HWIC Configuration Guide

7-6	OL-6415-03

OL-6415-03 specifications

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