Chapter 4: Troubleshooting

4.3TROUBLESHOOTING CHECKLIST

If the 6H12X-08 is not working properly, refer to Table 4-4for a checklist of possible problems, causes, and recommended actions to resolve the problem.

Table 4-4 Troubleshooting Checklist

Problem

Possible Cause

Recommended Action

 

 

 

 

 

 

All LEDs are OFF.

Loss of Power to the 6C105

Check the proper

 

chassis.

connection of the power

 

 

cable and its access to a

 

 

live outlet.

 

 

 

 

The 6H12X-08 not properly

Check the installation. See

 

installed.

Chapter 3.

 

 

 

No Local

Autobaud enabled.

Press ENTER (RETURN)

Management

 

(may take up to four times).

Password screen.

 

 

Terminal setup is not

Refer to Chapter 5 for

 

 

correct.

proper setup procedures.

 

 

 

 

Improper console cable

Refer to Appendix A for

 

pinouts.

proper console port pinouts.

 

 

 

Cannot contact the

Improper Community

Refer to Chapter 5

6H12X-08 from

Names Table.

for Community Names

in-band

 

Table setup.

management.

 

 

The 6H12X-08 does not

Refer to Chapter 5 for IP

 

 

have an IP address.

address assignment

 

 

procedure.

 

 

 

 

Port is disabled.

Enable port.

 

 

 

 

No link to device.

Check link to device.

 

 

 

Port(s) goes into

The 6H12X-08 detects a

Review network design and

standby for no

looped condition.

delete unnecessary loops.

apparent reason.

 

 

 

 

 

User parameters

Mode switch (7), NVRAM

Reenter the lost parameters

(IP address,

Reset, was changed

as necessary.

Device and

sometime before either

 

Module name,

cycling power or pressing

Call the Cabletron Systems

etc.) are lost when

the RESET button, causing

Global Call Center if

the 6H12X-08 is

the user-entered

problem persists.

powered down or

parameters to reset to

 

the front panel

factory default settings.

 

RESET button is

 

 

pressed.

Clear NVRAM was set

 

 

through Local Management.

 

 

 

 

4-6

6H128-08 and 6H129-08 User’s Guide

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Cabletron Systems 6H129-08, 6H128-08 manual Troubleshooting Checklist

6H129-08, 6H128-08 specifications

Cabletron Systems was a notable provider of networking hardware in the 1990s, specializing in solutions that enabled enterprises to build robust and scalable networks. Among their product offerings were the models 6H128-08 and 6H129-08, which were designed to meet the needs of demanding networking environments.

The 6H128-08 is an Ethernet hub that supports up to 128 ports. This model is particularly recognized for its reliability and performance in connecting numerous devices within a local area network. One of the main features of the 6H128-08 is its support for both 10BASE-T and 100BASE-TX Ethernet standards, allowing it to handle varying data transmission speeds and ensuring compatibility with older and newer devices. This dual support features made it particularly appealing for businesses transitioning from older network technologies to faster Ethernet connections.

In terms of technology, the 6H128-08 leverages a centralized architecture which reduces network collision domains. This design contributes to improved network performance by allowing simultaneous data transmission from multiple devices. The hub features a range of LEDs that provide real-time status updates on port connectivity and data transmission activity. This allows network administrators to easily monitor and troubleshoot connectivity issues.

The 6H129-08 is often paired with the 6H128-08, functioning effectively as an additional port expander or in cascading configurations. This model also supports 128 ports and offers identical compatibility with the Ethernet standards mentioned, ensuring seamless integration in larger network setups. An important characteristic of the 6H129-08 is its enhanced fault tolerance, which is vital in mission-critical environments where network downtime must be minimized.

Both models are equipped with various management features, enabling network administrators to configure settings and optimize performance easily. The ability to use SNMP for network management supports monitoring and managing the entire network from centralized software applications.

Overall, the Cabletron Systems 6H128-08 and 6H129-08 stand out for their robust performance, extensive port capabilities, and compatibility with multiple Ethernet standards, making them suitable for enterprises looking to build or expand their networking infrastructure. These products reflect Cabletron's commitment to reliability and innovation in the field of networking hardware.