Cisco 2821 Series User Manual

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Installing and Upgrading Fans in the Cisco 2821 and Cisco 2851 Series Routers
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Upgrading the Cisco 2821 and Cisco 2851 Fan Unit
Replacing the Router Cover
Note Before you begin, read the safety warnings as described in the “Safety Warnings and Guidelines” section
on page 2.
To replace the chassis cover on a Cisco 2821 or Cisco 2851 router, follow these steps. You need a number
2 Phillips screwdriver.
Step 1 Place the chassis on a flat surface.
Step 2 Hold the cover at a 45-degree angle, and insert the tabs into the slots along the front (bezel) edge of the
chassis, as shown in Figure 8.
Figure 8 Installing the Cover on the Cisco 2821 or Cisco 2851 Routers
1 Insert tabs and center the cover 2 Close the cover
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Cisco 2821 Series Specifications

General

Form Factor	Rack-mountable
Power Supply	AC 120/230 V (50/60 Hz)
Product Type	Router
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Operating System	Cisco IOS
Expansion Slots	4 x HWIC
Memory	256 MB (max 1 GB)
Network/Transport Protocol	L2TP, IPSec, PPPoE
Remote Management Protocol	SNMP, Telnet, HTTP, SSH
Encryption Algorithm	DES, 3DES, AES
Features	VPN support, Firewall protection, VLAN support, QoS
Flash Memory	64 MB (installed) / 128 MB (max)