Cisco 870 Series - User Manual

Questions and Answers

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Jennifer FordAug 8, 2025
Why can't I connect to the Internet with my Cisco 870 Network Router?
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  laurie72Aug 8, 2025
  There could be several reasons why you cannot connect to the Internet using your Cisco Network Router. First, ensure your broadband modem or external Ethernet switch is properly connected and powered on. Second, there might be an issue with your broadband or WAN service, so check with your Internet service provider. Finally, the router might be improperly configured. Use the Cisco Router and Security Device Manager (SDM) software, or configure the router using a PC connected to the console port.
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Diana MccoyAug 13, 2025
What to do if there is no power to my Cisco 870?
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  Patricia JordanAug 14, 2025
  If your Cisco Network Router has no power, follow these steps: 1. Ensure the power switch is set to ON. 2. Verify all connections to and from the power supply are secure. 3. Confirm the power outlet has power. If the problem persists, the power supply might be faulty; in that case, contact your Cisco reseller.
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Kevin DanielAug 19, 2025
What to do if my Cisco 870 Network Router has no connection to modem or to Ethernet switch?
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  jeremy56Aug 19, 2025
  If your Cisco Network Router has no connection to the modem or Ethernet switch (WAN LNK LED is off), it might be a cable-related issue. Here's what to do: 1. Make sure that you have cabled the device correctly. 2. Ensure the connectors at both ends of the cable are securely seated. 3. Check the cable for physical damage, and replace it if necessary with a similar cable.
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Richard ElliottAug 25, 2025
How to fix no connection to Ethernet devices on Cisco 870 Network Router?
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  Maria MayAug 26, 2025
  If your Cisco Network Router has no connection to Ethernet devices (ETHERNET LAN 0, ETHERNET LAN 1, ETHERNET LAN 2, and ETHERNET LAN 3 LEDs are off), it might be a cable problem. Try these steps: 1. Make sure that you have cabled the device correctly. 2. Ensure the connectors at both ends of the cable are securely seated. 3. Check whether the cable is physically damaged, and if it is, replace it with a similar cable.
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gonzalezthomasAug 31, 2025
Why is there no connection to xDSL link on my Cisco 870 Network Router?
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  michaelrodriguezAug 31, 2025
  If there is no connection to the xDSL link on your Cisco Network Router (The WAN LNK LED on the front panel is off for a long time), the cause might be the wrong cable. Make sure that you are using the correct cable.

Cisco 870 Series Specifications

General

Flash Memory	32 MB
VPN Support	Yes
Firewall	Yes
Data Link Protocol	Ethernet, Fast Ethernet
Remote Management Protocol	SNMP, Telnet, HTTP, HTTPS
Authentication Method	RADIUS, TACACS+
Weight	2.2 lbs
Operating System	Cisco IOS
Form Factor	Desktop
Model	870 Series
Product Type	Router
Category	Network Router
WAN Interfaces	1 x 10/100 Ethernet
LAN Interfaces	4 x 10/100 Ethernet
Connectivity Technology	Wired
Network / Transport Protocol	IPSec
Features	VLAN support
Encryption Algorithm	DES, 3DES, AES
Compliant Standards	IEEE 802.3, IEEE 802.3u