Cisco 2431 - IAD Router

Other manuals for Cisco 2431 - IAD Router

Questions and Answers:

V
vanessarodriguezJul 31, 2025
Why is my Cisco Network Router having poor performance or excessive errors?
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  Sarah NealJul 31, 2025
  Poor performance or excessive errors in your Cisco Network Router can stem from a duplex autonegotiation mismatch. Refer to the switch software configuration guide to identify and resolve these mismatches. Alternatively, check if cabling distance is exceeded or if port statistics reveal excessive frame check sequence (FCS), late-collision, or alignment errors. For 10/100BASE-TX connections, ensure the distance between the port and the device is within 328 feet (100 meters). For SFP module port connections, adhere to SFP module cabling guidelines. Reduce cable length if needed and consult your repeater or SFP module documentation for specific cabling guidelines.
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Gregg KnappAug 6, 2025
What to do if my Cisco Network Router has no connectivity?
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  Teresa MillerAug 6, 2025
  If your Cisco Network Router has no connectivity, it could be due to an incorrect or faulty cable. Ensure you're using the correct type of cable (straight-through or crossover) for your connection. Check the cable wiring for errors, referring to the “Two Twisted-Pair Cable Pinouts” section on page B-3 for correct pinouts. For 1000BASE-T connections, use a twisted four-pair, Category 5 cable. You can also enable the automatic medium-dependent- interface crossover (auto-MDIX) feature. Try replacing the cable with a known good one and wait 30 seconds for the port LED to turn green.
K
Kayla WhiteAug 11, 2025
What to do if Cisco Network Router switch port is placed in error-disabled state after SFP module is inserted?
- A
  Aaron SloanAug 12, 2025
  If a Cisco Network Router switch port enters an error-disabled state after inserting an SFP module, it might be due to a bad or non-Cisco-approved SFP module. Remove the SFP module and replace it with a Cisco-approved module. Use the `errdisable recovery cause gbic-invalid` global configuration command to verify the port status and set a time interval to recover from the error-disabled state. Refer to the switch command reference guide for information on the errdisable recovery command.
B
Brian PerkinsAug 18, 2025
How to fix a Cisco Network Router that does not recognize the SFP module?
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  joshuamurphyAug 18, 2025
  If your Cisco Network Router switch doesn't recognize the SFP module, ensure it's not installed upside down and that it snaps into the slot correctly. Remove the SFP module and inspect the connector, module, and module slot for physical damage. Replace the SFP module with a known good one.
H
Heather MooreAug 23, 2025
Why are there unreadable characters on the management console of my Cisco Network Router?
- A
  Adam KempAug 25, 2025
  If you see unreadable characters on the management console of your Cisco Network Router, the baud rate is likely incorrect. Reset the emulation software to 9600 baud.

Cisco 2431 - IAD Router Specifications

General

Device Type	IAD Router
Form Factor	Desktop
Connectivity Technology	Wired
Data Link Protocol	Ethernet, Fast Ethernet
Operating System	Cisco IOS
Weight	5.5 lbs
WAN Interface	Ethernet
Voice Ports	2 x FXS
Network / Transport Protocol	IP
Remote Management Protocol	SNMP, Telnet, HTTP, HTTPS
Features	Firewall protection, DHCP server, NAT support, VLAN support, Quality of Service (QoS)
Compliant Standards	IEEE 802.3, IEEE 802.3u
Interfaces	2 x FXS
Power Supply	AC
Dimensions (H x W x D)	1.75 x 17.5 x 13.5 inches
Operating Temperature	32 °F to 104 °F (0 °C to 40 °C)
Humidity	10 - 95% (non-condensing)