Chapter 5 Troubleshooting

Troubleshooting Supervisor Engines

Boot Problems

If the switch is in a continuous boot loop, is in ROMmon mode, or does not have a system image, there is mostly likely not a hardware problem. The supervisor engine operates in a continuous loop if you have not set the boot variable correctly and you have set the configuration register to 0x2102. For instructions on how to recover the supervisor engine, refer to the “Recovering from a Continuous Reboot” section of the document at this location:

http://www.cisco.com/en/US/products/hw/switches/ps663/products_configuration_example09186a008 0094ecf.shtml

The supervisor engine goes into ROMmon mode or fails to boot when the system image is either corrupt or absent. For instructions on how to recover the supervisor engine, refer to the “Recovering from a Corrupt or Missing Image” section of the document at this location: http://www.cisco.com/en/US/products/hw/switches/ps663/products_configuration_example09186a008 0094ecf.shtml

The supervisor engines have onboard system Flash memory (bootflash), which should easily hold multiple system images. Therefore, have a backup image. In addition to the bootflash, the supervisor engine supports up to 128 MB of compact Flash in the slot0: device. The supervisor engine also provides for transfer via TFTP of the image from ROMmon mode, which enables faster recovery of absent or corrupt images.

Cannot Connect to a Switch Through the Console Port

Make sure you are using the correct type of cable. Make sure the terminal configuration matches the switch console port configuration—default console port settings are 9600 baud, 8 data bits, no parity, 1 stop bit. Make sure the cable pinouts are correct for your supervisor engine (refer to the hardware documentation for your supervisor engine).

Cannot communicate with another device, Cannot Telnet to the switch, Cannot communicate with a local or remote host

Follow these steps:

Step 1 Make sure the LINK LED for the port is green.

Step 2 Check the cabling:

Host-to-switch 10BASET connections and router-to-switch 10BASET or 100BASETX connections typically are made using a straight-through cable.

Switch-to-switch connections typically are made using a rollover cable.

For SC- or ST-type fiber connections, make sure transmit (Tx) on one end of the link connects to receive (Rx) on the other end of the link.

Step 3 Make sure the interface you are connecting to (sc0 or me1) is configured UP (use the show interface command to check).

Step 4 Make sure the IP address, subnet mask, and VLAN membership of the switch interface (sc0 or me1) is correct (use the show interface command).

Step 5 To prevent conflicts, make sure the me1 and sc0 interfaces are configured with IP addresses and subnet masks in different subnets (use the show interface command to check), or disable one of the interfaces using the set interface {sc0 me1} disable command.

Step 6 Make sure the host configuration (IP address, subnet mask, default gateway, speed, and duplex setting) is correct.

 

 

Catalyst 4500 E-Series Switches Installation Guide

 

 

 

 

 

 

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Cisco Systems 4500 E-Series, WSUPOE12VPSPL manual Boot Problems, Cannot Connect to a Switch Through the Console Port

4500 E-Series, WSUPOE12VPSPL specifications

Cisco Systems has long been at the forefront of networking technology, consistently delivering innovative products that shape the future of digital communication. Among its extensive range of offerings, the WSUPOE12VPSPL and the Catalyst 4500 E-Series stand out as exemplary solutions tailored for businesses seeking robust, scalable, and versatile network infrastructure.

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Overall, the Cisco WSUPOE12VPSPL and the Catalyst 4500 E-Series offer a powerful combination of features, technologies, and characteristics that make them indispensable to modern networking. They cater to the demands of diverse business environments, ensuring reliability, flexibility, and scalability as organizations continue to evolve in an increasingly digital landscape.