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IN-30
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
OL-10101-02
traceroute, Layer 2
and ARP 31-16
and CDP 31-16
described 31-16
IP addresses and subnets 31-16
MAC addresses and VLANs 31-16
multicast traffic 31-16
multiple devices on a port 31-17
unicast traffic 31-16
usage guidelines 31-16
traffic
blocking flooded 21-5
fragmented 28-3
unfragmented 28-3
traffic policing 1-7
transparent mode, VTP 17-3, 17-12
trap-door mechanism 4-2
traps
configuring MAC address notification 7-21
configuring managers 27-11
defined 27-3
enabling 7-21, 27-11
notification types 27-11
overview 27-1, 27-4
troubleshooting
connectivity problems 31-14
detecting unidirectional links 22-1
displaying crash information 31-21
GBIC security and identification 31-14
LRE ports 31-17
with CiscoWorks 27-4
with debug commands 31-18
with ping 31-14
with system message logging 26-1
trunk ports
configuring 16-17
defined 10-2
trunks
allowed-VLAN list 16-18
trunks (continued)
load sharing
setting STP path costs 16-22
using STP port priorities 16-20, 16-21
native VLAN for untagged traffic 16-19
parallel 16-22
pruning-eligible list 16-19
to non-DTP device 16-14
VLAN 1 minimization 16-18
trusted boundary 29-21
twisted-pair Ethernet, detecting unidirectional links 22-1
type-of-service
See TOS
U
UDLD
default configuration 22-4
echoing detection mechanism 22-2
enabling
globally 22-5
per interface 22-5
link-detection mechanism 22-1
neighbor database 22-2
overview 22-1
resetting an interface 22-6
status, displaying 22-7
unauthorized ports with IEEE 802.1x 9-4
unicast MAC address filtering
and adding static addresses 7-25
and broadcast MAC addresses 7-24
and CPU packets 7-24
and multicast addresses 7-24
and router MAC addresses 7-24
configuration guidelines 7-24
described 7-24
unicast storm control
See storm control
unicast traffic, blocking 21-5