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
Wireless Device Overview
Wireless devices (also known as access points) provide a secure, affordable, and easy-to-use wireless
LAN solution that combines mobility and flexibility with the enterprise-class features required by
networking professionals. When configured as an access point, the wireless device serves as the
connection point between wireless and wired networks or as the center point of a stand-alone wireless
network. In large installations, wireless users within radio range of an access point can roam throughout
a facility while maintaining seamless, uninterrupted access to the network.
With a management system based on Cisco IOS software, wireless devices are Wi-Fi CERTIFIED™,
802.11a-compliant, 802.11b-compliant, 802.11g-compliant, and 802.11n-compliant wireless LAN
transceivers.
This module contains the following information:
• Software Modes, page 243
• Management Options, page 244
Software Modes
The access point is shipped on the Cisco 1941W integrated services router, and it includes an
autonomous image and recovery image on the access point’s flash. The default mode is autonomous,
however the access point can be upgraded to operate in Cisco Unified Wireless mode.
Each mode is described below:
– Autonomous mode—Supports standalone network configurations, where all configuration
settings are maintained locally on the wireless device. Each autonomous device can load its
starting configuration independently, and still operate in a cohesive fashion on the network.
– Cisco Unified Wireless mode—Operates in conjunction with a Cisco Unified Wireless LAN
controller, where all configuration information is maintained within the controller. In the Cisco
Unified Wireless LAN architecture, wireless devices operate in the lightweight mode using
Lightweight Access Point Protocol (LWAPP), (as opposed to autonomous mode). The
lightweight access point, or wireless device, has no configuration until it associates to a
controller. The configuration on the wireless device can be modified by the controller only when
the networking is up and running. The controller manages the wireless device configuration,
firmware, and control transactions such as 802.1x authentication. All wireless traffic is tunneled
through the controller.

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