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IN-39
Catalyst 2960 and 2960-S Switch Software Configuration Guide
OL-8603-09
traffic suppression 23-2
transmit hold-count
see STP
transparent mode, VTP 14-4
trap-door mechanism 3-2
traps
configuring MAC address notification 5-23, 5-25, 5-26
configuring managers 30-12
defined 30-3
enabling 5-23, 5-25, 5-26, 30-12
notification types 30-12
overview 30-1, 30-4
troubleshooting
connectivity problems 38-14, 38-15, 38-17
CPU utilization 38-28
detecting unidirectional links 24-1
displaying crash information 38-23
setting packet forwarding 38-22
SFP security and identification 38-13
show forward command 38-22
with CiscoWorks 30-4
with debug commands 38-20
with ping 38-14
with system message logging 29-1
with traceroute 38-17
trunk failover
See link-state tracking
trunking encapsulation 1-9
trunk ports
configuring 13-16
defined 12-3, 13-3
trunks
allowed-VLAN list 13-17
load sharing
setting STP path costs 13-21
using STP port priorities 13-19, 13-20
native VLAN for untagged traffic 13-18
parallel 13-21
pruning-eligible list 13-18
to non-DTP device 13-13
trusted boundary for QoS 33-43
trusted port states
between QoS domains 33-45
classification options 33-5
ensuring port security for IP phones 33-43
support for 1-13
within a QoS domain 33-40
trustpoints, CA 9-46
twisted-pair Ethernet, detecting unidirectional links 24-1
type of service
See ToS
U
UDLD
configuration guidelines 24-4
default configuration 24-4
disabling
globally 24-5
on fiber-optic interfaces 24-5
per interface 24-6
echoing detection mechanism 24-3
enabling
globally 24-5
per interface 24-6
link-detection mechanism 24-1
neighbor database 24-2
overview 24-1
resetting an interface 24-6
status, displaying 24-7
support for 1-8
unauthorized ports with IEEE 802.1x 10-11
unicast MAC address filtering 1-6
and adding static addresses 5-28
and broadcast MAC addresses 5-28
and CPU packets 5-28
and multicast addresses 5-28
and router MAC addresses 5-28