Installation guide

36 Release Notes for Catalyst 6000 Family Software Release 5.x
Documentation Updates for Software Release 5.3
— show port—Check to see if the port has registered a lot of alignment, FCS, or any other type
of line errors. If these errors are incrementing continuously, the port might drop input
BPDUs.
— show mac—If the Inlost counter is incrementing continuously, the port is losing input
packets because of a lack of receive buffers. This problem can also cause the port to drop
incoming BPDUs.
• On a blocked spanning-tree port, check the duplex configuration to ensure that the port duplex is
set to the same type as the port of its neighboring Catalyst 6000 or 6500 series switch.
• On trunk ports, make sure that the trunk configuration is set properly on both sides of the link.
• On trunk ports, make sure that the duplex is set to full on both sides of the link to prevent any
collisions under heavy traffic conditions.
• On your Catalyst 6000 family switch, ensure that the sum of the logical ports across all instances
of spanning tree for different VLANs does not exceed 4000. The sum of all logical ports equals
the number of trunks or channels on the switch times the number of active VLANs on that trunk,
plus the number of nontrunking ports on the switch.
Caution When numerous protocol features (such as VTP pruning, Fast EtherChannel, and RMON)
are enabled concurrently, the number of supported logical spanning-tree ports are reduced. Also, to
achieve these numbers, we recommend that you keep switched traffic off the management VLAN.
Documentation Updates for Software Release 5.3
This section describes caveats for the Catalyst 6000 family software release 5.3 documentation.
These changes will be included in the next update to the documentation.
• The following messages are documented in the online version of the Catalyst 6000 Family
System Message Guide:
SYS-5-SUP_SBYLOWPWR:Standby drawing less power. Potential power budget violation at
switchover
SYS-5-SUP_SBYHIGHPWR:Standby drawing more power. System may run over power budget
SYS-1-SYS_OVERPWRRTNG:System drawing more power than the power supply rating
SYS-1-SYS_NORMPWRMGMT:System in normal power management operation
SYS-1-MOD_PWRSPROMFAIL:Power mgmt sprom failure for module [dec]
• The show file command is documented only in the online version of the Catalyst 6000 Family
Command Reference, Software Release 5.3 publication.
• The show mls command displays combined information about the total number of unicast and
multicast packets switched. Unicast and multicast traffic statistics are not displayed separately.
• In the QoS chapter of the Catalyst 6000 Family Software Configuration Guide, Software Release
5.3, the default transmit queue drop threshold percentages should be:
Transmit queue drop threshold
percentages
• Low-priority queue threshold 1: 80%
• Low-priority queue threshold 2: 100%
• High-priority queue threshold 1: 80%
• High-priority queue threshold 2: 100%