Installation guide

77
Release Notes for Catalyst5000 Family Software Release4.x
OL-2306-01
Usage Guidelines, Restrictions, and Troubleshooting
Modules and Switch Ports
This section contains usage guidelines, restrictions, and troubleshooting information that apply to
modules and switch ports.
• To avoid a broadcast storm on Catalyst 5500 switches with a Supervisor Engine III and NFFC,
do not insert a WS-X5030 Token Ring module in slots 9 through 12 while the switch is in service.
Reset the switch after inserting a WS-X5030 Token Ring module in slots 9 through 12.
(CSCdk67305)
• If the Catalyst 5000 family switch has a Supervisor Engine II, Supervisor Engine II G, or Supervisor
Engine III G and a Network Analysis module installed in the chassis, SNMP timeout errors might
be seen when TrafficDirector is used to install RMON statistics tables on all the ports.
Workaround: Disable the Extended RMON feature with the set snmp extededrmon disable
command or enable SPAN, with the port on NAM module as the SPAN destination port if you want
to use the Extended RMON feature provided by the Network Analysis module.
• On Catalyst 5500 switches with a Supervisor Engine III and NFFC, to avoid a broadcast storm, do
not insert a WS-X5030 Token Ring module in slots 9 through 12 while the switch is in service. Reset
the switch after inserting a WS-X5030 Token Ring module in slots 9 through 12.
• When inserting a module into a Catalyst5000 family chassis, be sure to use the ejector levers on the
front of the module to seat the backplane pins properly. Incorrectly inserting a module can cause
unexpected behavior. For proper module installation instructions, refer to the Catalyst5000 Series
Module Installation Guide.
• When you replace a module (other than the supervisor engine) with a module of a different type, or
when you insert a module (other than the supervisor engine) in an empty slot, enter the command
clear config mod_num to clear the module configuration information in the supervisor engine and
obtain the correct spanning tree parameters.
• If a module fails to come online, reset the module by entering the reset mod_num command.
• On a Catalyst5000 family switch with a Supervisor Engine I or II, if you attempt to download a new
supervisor engine software image file before one or more modules come online, those modules
might fail to come online. Once the download is complete and you reset the switch, the modules
should come online correctly.
• If a port fails the physical-medium-dependent (PMD) loopback test (port LED is flashing orange)
after the Catalyst5000 family switch is reset, you must reset the affected module to recover.
• If the Catalyst 5000 family switch detects a port-duplex misconfiguration, the misconfigured switch
port is disabled and placed in the errdisable state. Reconfigure the port-duplex setting and use the
set port enable command to reenable the port.
• In Catalyst 5000 family supervisor engine software release 3.2(2) and later, when the 48-port
10BASE-T Telco module (WS-X5012) detects excessive/late collisions on a port, that port is
automatically disabled. The show port command output shows the state of the disabled port as
“errdisable.”
These errors can occur when there is a port-duplex misconfiguration (both ends of the link are not
configured for the same duplex mode) or when the attached cable is not to specification (too long
or of the wrong type). If a port has been automatically disabled, make sure the duplex configuration
is the same on both ends of the link, verify that the cable is within specification, and then reenable
the port using the set port enable command.
• If you have a port whose port speed is set to auto connected to another port whose speed is set to a
fixed value, configure the port whose speed is set to a fixed value for half duplex. Alternately, you
can configure both ports to a fixed-value port speed and full duplex.