Chapter 5. Maintenance; Resolving No Link Condition; Appendix A Technical Specifications - TP-Link TL-SG3424 User Manual

5. Maintenance

5-1. Resolving No Link Condition

The possible causes for a no link LED status are as follows:
The attached device is not powered on
The cable may not be the correct type or is faulty
The installed building premise cable is faulty
The port may be faulty
5-2. Q&A
1. Computer A can connect to Computer B, but cannot connect to Computer C
through the Managed Switch.
The network device of Computer C may fail to work. Please check the
link/act status of Computer C on the LED indicator. Try another network
device on this connection.
The network configuration of Computer C may be something wrong. Please
verify the network configuration on Computer C.
2. The uplink connection function fails to work.
The connection ports on another must be connection ports. Please check if
connection ports are used on that Managed Switch.
Please check the uplink setup of the Managed Switch to verify the uplink
function is enabled.
3. The console interface cannot appear on the console port connection.
The COM port default parameters are [Baud Rate: 57600, Data Bits: 8,
Parity Bits: None, Stop Bit: A, Flow Control: None]. Please check the COM
port property in the terminal program. And if the parameters are changed,
please set the COM configuration to the new setting.
Check the RS-232 cable is connected well on the console port of the
Managed Switch and COM port of PC.
Check if the COM of the PC is enabled.
4. How to configure the Managed Switch?
The "Hyperterm" is the terminal program in Win95/98/NT. Users can also use
any other terminal programs in Linux/Unix to configure the Managed Switch.
Please refer to the user guide of that terminal program. But the COM port
parameters (baud rate/ data bits/ parity bits/ flow control) must be the same
as the setting of the console port of the Managed Switch.
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User Manual
Publication date: January, 2006
Revision A2
User Manual
Appendix A
Technical Specifications
Features
•
22 (10/100/1000Mbps) Gigabit Ethernet (TP) switching ports are compliant with
IEEE802.3, 802.3u, 802.3z and 802.3ab.
•
2 Gigabit TP/SFP fiber are dual media ports with auto detected function.
•
Non-blocking store-and-forward shared-memory Web-Smart switched.
•
Supports auto-negotiation for configuring speed, duplex mode.
•
Supports 802.3x flow control for full-duplex ports.
•
Supports collision-based and carrier-based backpressure for half-duplex ports.
•
Any ports can be in disable mode, force mode or auto-polling mode.
• Supports Head of Line (HOL) blocking prevention.
• Supports broadcast storm filtering.
• Auto-aging with programmable inter-age time.
• Supports 802.1p Class of Service with 2-level priority queuing.
• Supports port sniffer function
•
Programmable maximum Ethernet frame length of range from 1518 to 9216
bytes jumbo frame.
• Supports port-based VLAN, 802.1Q tag-based VLAN.
• Efficient self-learning and address recognition mechanism enables forwarding
rate at wire speed.
• Web-based management provides the ability to completely manage the switch
from any web browser.
•
SNMP/Telnet interface delivers complete in-band management.
• Supports IEEE 802.1d Spanning Tree Protocol.
• Supports IEEE 802.1w Rapid Spanning Trees.
• Supports IEEE 802.1X port-based network access control.
• Supports IP Multicasting to implement IGMP Snooping function.
• Supports 802.1p Class of Service with 2-level priority queuing.
•
Supports 802.3ad port trunking with flexible load distribution and failover
function.
• Supports ingress port security mode for VLAN Tagged and Untagged frame
process.
• Supports SNMP MIB2 and RMON sampling with sampled packet error
indication.
Publication date: January, 2006
Revision A2
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