Cisco 2921 User Manual

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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Configuring Radio Settings
The following sections describe how to configure radio settings for the wireless device:
• Enabling the Radio Interface, page 261
• Configuring the Role in the Radio Network, page 263
• Configuring Dual-Radio Fallback, page 265
• Configuring Radio Data Rates, page 266
• Configuring MCS Rates, page 269
• Configuring Radio Transmit Power, page 271
• Configuring Radio Channel Settings, page 273
• Enabling and Disabling World Mode, page 279
• Disabling and Enabling Short Radio Preambles, page 281
• Configuring Transmit and Receive Antennas, page 282
• Enabling and Disabling Gratuitous Probe Response, page 283
• Configuring the Ethernet Encapsulation Transformation Method, page 285
• Enabling and Disabling Public Secure Packet Forwarding, page 286
• Configuring the Beacon Period and the DTIM, page 288
• Configure RTS Threshold and Retries, page 289
• Configuring the Maximum Data Retries, page 290
• Configuring the Fragmentation Threshold, page 290
• Enabling Short Slot Time for 802.11g Radios, page 291
• Performing a Carrier Busy Test, page 291
• Configuring VoIP Packet Handling, page 292
Enabling the Radio Interface
The wireless device radios are disabled by default.
Note You must create a service set identifier (SSID) before you can enable the radio interface.

Cisco 2921 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
Product color	Black
Rack capacity	2U
USB version	2.0
RS-232 ports	1
USB ports quantity	2
Ethernet LAN (RJ-45) ports	3
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
Firewall security	Cisco IOS
Operating altitude	0 - 3000 m
Non-operating altitude	0 - 4570 m
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 85 %
AC input voltage	100 - 240 V
Power source type	AC
AC input frequency	47 - 63 Hz
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	469.9 mm
Width	438.2 mm
Height	88.9 mm
Weight	13200 g