Cisco 2911 Configuration Guide

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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Chapter Configuring Radio Settings
Configuring the Beacon Period and the DTIM
To disable protected port, use the no switchport protected command.
For detailed information on protected ports and port blocking, see the “Configuring Port-Based Traffic
Control” chapter in Catalyst 3550 Multilayer Switch Software Configuration Guide, 12.1(12c)EA1.
Click this link to browse to that guide:
http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_12c_ea1/
configuration/guide/3550scg.html
Configuring the Beacon Period and the DTIM
The beacon period is the amount of time between access point beacons in kilomicroseconds
(Kmicrosecs). One Kmicrosec equals 1,024 microseconds. The data beacon rate, always a multiple of
the beacon period, determines how often the beacon contains a delivery traffic indication message
(DTIM). The DTIM tells power-save client devices that a packet is waiting for them.
For example, if the beacon period is set at 100, its default setting, and if the data beacon rate is set at 2,
its default setting, then the wireless device sends a beacon containing a DTIM every 200 Kmicrosecs.
The default beacon period is 100, and the default DTIM is 2. To configure the beacon period and the
DTIM, follow these steps, beginning in privileged EXEC mode.
SUMMARY STEPS
1. configure terminal
2. interface dot11radio {0| 1}
3. beacon period value
4. beacon dtim-period value
5. end
6. copy running-config startup-config
DETAILED STEPS
Command Purpose
Step 1
configure terminal Enters global configuration mode.
Step 2
interface dot11radio {0| 1} Enters interface configuration mode for the radio interface. The
802.11g/n 2.4-GHz radio is radio 0.
The 802.11n 5-GHz radio is radio 1.
Step 3
beacon period value Sets the beacon period. Enter a value in kilomicroseconds.
Step 4
beacon dtim-period value Sets the DTIM. Enter a value in kilomicroseconds.
Step 5
end Returns to privileged EXEC mode.
Step 6
copy running-config startup-config (Optional) Saves your entries in the configuration file.

Cisco 2911 Specifications

General

Ethernet LAN	Yes
Cabling technology	10/100/1000Base-T(X)
Networking standards	IEEE 802.1Q, IEEE 802.1ag, IEEE 802.3, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3ah, IEEE 802.3u
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet interface type	Gigabit Ethernet
DHCP client	-
Routing protocols	BGP, EIGRP, OSPF
Supported protocols	IPv4, IPv6, IS-IS, IGMPv3, PIM SM, SSM, DVMRP, IPSec, GRE, BVD, MPLS, L2TPv3, PPP, MLPPP, MLFR, HDLC, RS-232, RS-449, X.21, V.35, EIA-530, PPPoE, ATM
USB version	2.0
RS-232 ports	1
Expansion slots	4 x EHWIC 2 x DSP 1 x ISM
USB ports quantity	2
Ethernet LAN (RJ-45) ports	3
Firewall security	Cisco IOS
Input current	2.2 A
AC input voltage	100 - 240 V
Power source type	AC
AC input frequency	47 - 63 Hz
Power consumption (typical)	50 W
Product color	Black
Rack capacity	2U
Operating altitude	0 - 4000 m
Non-operating altitude	0 - 4570 m
Storage temperature (T-T)	-40 - 80 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	5 - 85 %
Safety	UL 60950-1, CAN/CSA C22.2 No. 60950-1, EN 60950-1, AS/NZS 60950-1, IEC 60950-1
Electromagnetic compatibility	47 CFR, ICES-003, EN55022, CISPR22, AS/NZS 3548, VCCI V-3, EN 300-386, EN 61000, EN 55024, CISPR 24EN50082-1

Weight and Dimensions

Depth	304.8 mm
Width	438.2 mm
Height	88.9 mm
Weight	8200 g