Cisco 1800 Series Configuring

Configuring Radio Settings on an Access Point
How to Configure Radio Settings on an Access Point
15
Enabling and Disabling Short Radio Preambles on an Access Point
Perform this task to enable or disable short radio preambles.
Radio Preambles
The radio preamble (sometimes called a header) is a section of data at the head of a packet that contains
information that the AP and client devices need when sending and receiving packets. You can set the
radio preamble to long or short:
• Short—A short preamble improves throughput performance. Cisco Aironet Wireless LAN Client
Adapters support short preambles. Early models of Cisco Aironet's Wireless LAN Adapter (PC4800
and PC4800A) require long preambles.
• Long—A long preamble ensures compatibility between the AP and all early models of Cisco
Aironet Wireless LAN Adapters (PC4800 and PC4800A). If these client devices do not associate to
your access points, you should use short preambles.
Note You cannot configure short or long radio preambles on the 5-GHz radio.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface dot11Radio interface
4. preamble-short
5. end
6. copy running-config startup-config

Cisco 1800 Series Specifications

General

Category	Network Router
Performance	Varies by model
Form Factor	Desktop
Connectivity Technology	Wired
Remote Management Protocol	SNMP, Telnet, HTTP, HTTPS
Dimensions	Varies by model
Weight	Varies by model
Model	1800 Series
Interfaces	Ethernet, Fast Ethernet, Serial, ISDN
Routing Protocols	RIP, OSPF, EIGRP, BGP
Security	Firewall, VPN, ACLs
Data Link Protocol	Ethernet, Fast Ethernet, Serial, Frame Relay
Network / Transport Protocol	TCP/IP
Features	Quality of Service (QoS), VLAN support, DHCP server
RAM	Varies by model
Flash Memory	Varies by model
Power Supply	Internal AC power supply
Operating Temperature	0 to 40 °C (32 to 104 °F)
Storage Temperature	-4°F to 149°F (-20°C to 65°C)