Name: Cisco 3925
Brand: Cisco
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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide

Upgrading the Cisco IOS Software

This module describes how to upgrade the Cisco Internet Operating System (IOS) software image on the

following hardware:

• Cisco 3900 series ISRs

• Cisco 2900 series ISRs

• Cisco 1900 series ISRs

• Cisco 1941W Wireless Device

This module contains the following sections:

• Restrictions for Upgrading the System Image, page 217

• Information About Upgrading the System Image, page 218

• How to Upgrade the Cisco IOS Image, page 219

• How to Upgrade the IOS Image on the Access Point, page 239

• Additional References, page 242

Restrictions for Upgrading the System Image

• Cisco 3900 series, Cisco 2900 series, and Cisco 1900 series integrated services routers (ISRs)

download images to new Advanced Capability CompactFlash (CF) memory cards. Legacy CF will

not operate in Cisco 3900 series, Cisco 2900 series, and Cisco 1900 series ISRs. When legacy CF is

inserted, the following error message appears:

WARNING: Unsupported compact flash detected. Use of this card during normal operation can

impact and severely degrade performance of the system. Please use supported compact flash cards

only.

• Slot0 is the default CF slot. CF in Slot0 stores system image, configuration, and data files. CF must

be present in this slot for the router to boot and perform normal file operations.

• Cisco IOS images for the access point download images to the CF embedded on the access point.

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Cisco 3925 Specifications

General

Product Type	Router
Form Factor	Rack-mountable
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Connectivity Technology	Wired
Power	AC 120/230 V (50/60 Hz)
Redundant Power Supply	Optional
Routing Protocol	OSPF, IS-IS, BGP, EIGRP, PIM
Network/Transport Protocol	IPSec
Remote Management Protocol	SNMP, Telnet, SSH, HTTP
Encryption Algorithm	DES, Triple DES, AES
Flash Memory	256 MB
Weight	11.5 kg
Interfaces	2 x SFP (mini-GBIC)
Power Source	Internal power supply
Authentication Method	RADIUS, TACACS+, LDAP
Compliant Standards	IEEE 802.1Q, IEEE 802.3af
Operating Temperature	0 to 40 °C
Operating Humidity	5% to 85% (non-condensing)
Dimensions (WxDxH)	44.5 x 47.2 x 8.9 cm