Specifications
If you review and troubleshoot with the documents that this section references and you still have issues, contact Cisco Technical Support for further assistance.
Interface Is Stuck in the Receive Direction on Ports That Connect to Hubs or Other Devices
If certain interfaces are stuck in the receive direction when they connect to hubs or other devices, the problem can be the bug that Cisco bug ID CSCdx79678 (
registered customers only
) describes. You can still see the switch through Cisco Discovery Protocol if the switch connects
to another Cisco device. But this switch does not learn any MAC address on the port and does not forward traffic. Other adjacent working ports forward the traffic without issue. The root cause of the bug is the interface receipt of a packet that is larger in size than the maximum
transmission unit (MTU) size on the interface.
The bug can affect these line cards:
z
WS-X4504-FX-MT
z
WS-X4232-GB-RJ
z
WS-X4148-FX-MT
z
WS-X4148-RJ
z
WS-X4148-RJ21
z
WS-X4148-RJ45V
The fix is available in Cisco IOS Software Release 12.1(12c)EW and later. The workaround is to issue the
hw
-module module
slot number
reset
command in order to reset the module which has the problem port. This temporarily fixes the problem.
MAC Address of Directly Connected Port is Not Learned by the Remote Device
When a packet gets routed, it carries the source MAC address as that of the physical interface or VLAN interface, which performs the routing rather than the outgoing interface which is in switchport mode.
In order to learn the MAC address of the directly connected interface or port, you can configure the port for native VLAN. When any untagged frames are sent out of this port, the source MAC address associated physical port is learned and added to the MAC address table in the
remote device.
Power Supply and Fan Problems
Power Supply on a 4500 Chassis Is in errdisable State in the Output of the show power Command
If the power supply in a Catalyst 4500 chassis is in the
err-disable
state in the output of the
show power
command, see this Common Reasons and Solutions section:
Common Reasons and Solutions
The Catalyst 4500 has two power supply slots to provide 1+1 redundancy. However, the switch does not allow two different power supplies in the same chassis. The power supplies must be the same wattage and AC/DC type. The switch uses only the first power supply that the
switch recognizes. The switch puts the second power supply into
err-disable
state and ignores this power supply. You can safely remove the errdisable power supply from the chassis after you turn the chassis off. For more information, refer to the
Power
Management
section of
the document Environmental
Monitoring and Power Management.
Power Supply Fail LED Is On
If the power supply LED with the label Fail is on, see this Common Reasons and Solutions section in order to help identify the problem:
Common Reasons and Solutions
z
If you have dual power supplies, and they have different wattage or are of different AC/DC type, see the Power Supply on a 4500 Chassis Is in errdisable State in the Output of the show power Command section of this document.
z
If you have either a single power or dual power supply of the same type and the Fail LED is on, refer to the
Troubleshooting the Power Supply
section of the document Troubleshooting the Installation.
z
If the
show module
command output shows a message that states "
not enough power for module
", check the
Catalyst
4500 Series Power Supplies
section of the document Specifications for the minimum power requirements.
Fan Assembly Failed in the show environment status Command
If you issue the
show environment status
command and find that the fan assembly has failed, see this Common Reasons and Solutions section in order to help identify the problem:
Common Reasons and Solutions
For more information on this problem, refer to the
Troubleshooting the Fan Assembly
section of the document Troubleshooting the Installation.
Diagnostic Commands
z
show version
z
show module
z
show diagnostics online module
z
show diagnostics power-on
z
show power
z
show environment status
z
show interface
interface-id
status
z
show errdisable recovery
z
show interface
interface-id
counters error
show version
The
show version
command output provides this type of information:
z
The software version that the Supervisor Engine currently runs
z
Uptime, which is the time since the last reset
z
The reason for the last reset
z
The system image file that currently runs
z
The amount of memory that you have installed
z
The configuration register and serial number
The information appears in
boldface
in this sample output:
4507#
show version
Cisco Internetwork Operating System Software
IOS (tm) Catalyst 4000 L3 Switch Software (cat4000-IS-M),
Version 12.1(12c)EW
,
EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Thu 22-Aug-02 19:28 by hqluong
Image text-base: 0x00000000, data-base: 0x00CA7148
ROM: 12.1(12r)EW(1.05)
Dagobah Revision 63, Swamp Revision 24
4507 uptime is 6 days, 23 hours, 17 minutes
System returned to ROM by redundancy reset
System image file is "bootflash:cat4000-is-mz.121-12c.EW"
cisco WS-C4507R (XPC8245) processor (revision 4) with
524288K bytes of memory.
Processor board ID FOX062105FP
Last reset from Redundancy Reset
48 FastEthernet/IEEE 802.3 interface(s)
52 Gigabit Ethernet/IEEE 802.3 interface(s)
403K bytes of non-volatile configuration memory.
Configuration register is 0x2102
show module
The
show module
command provides this critical information:
z
What Supervisor Engine is active, in a 4507R or 4510R
z
The model number of the modules that are present in various slots
z
The status of the modules
The information appears in
boldface
in this sample output:
4507#
show module
Mod Ports Card Type
Model
Serial No.
----+-----+--------------------------------------+-----------------+-----------
1 2 1000BaseX (GBIC) Supervisor(
standby
)
WS-X4515
JAB0627065V
2 2 1000BaseX (GBIC) Supervisor(
active
)
WS-X4515
JAB062408TV
3 48 10/100/1000BaseTX (RJ45)
WS
-
X4448
-
GB
-
RJ45
JAB053606AG