Index
IN-31
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-10
U
UDLD
default configuration
23-4
echoing detection mechanism 23-3
enabling
globally
23-5
per interface 23-5
link-detection mechanism 23-1
neighbor database 23-2
overview 23-1
resetting an interface 23-6
status, displaying 23-7
unauthorized ports with 802.1x 10-4
unicast MAC address filtering
and adding static addresses
8-27
and broadcast MAC addresses 8-27
and CPU packets 8-27
and multicast addresses 8-27
and router MAC addresses 8-27
configuration guidelines 8-27
described 8-27
unicast traffic, blocking 22-6
UniDirectional Link Detection protocol
See UDLD
UNIX syslog servers
daemon configuration
27-11
facilities supported 27-12
message logging configuration 27-11
unrecognized Type-Length-Value (TLV) support 18-4
upgrade
behavior details
13-26
configuring for 13-24
controller configuration 13-25
example 13-26
global configuration 13-25
LRE switch firmware upgrade 13-23
performing 13-24
upgrading software, VLAN considerations 18-8
upgrading software images
See downloading
UplinkFast
described
16-3
enabling 16-16
support for 1-4
uploading
configuration files
preparing
B-11, B-13, B-16
reasons for B-8
using FTP B-14
using RCP B-18
using TFTP B-12
image files
preparing
B-21, B-24, B-28
reasons for B-19
using FTP B-27
using RCP B-31
using TFTP B-23
upstream power back-off 1-8, 13-21
user EXEC mode 2-2
username-based authentication 9-7
V
version-dependent transparent mode 18-4
virtual IP address
cluster standby group
7-12, 7-21
command switch 7-12, 7-21
See also IP addresses
vlan.dat file
17-4
VLAN 1 minimization, support for 1-5
VLAN configuration
at bootup
17-7
saving 17-7
VLAN configuration mode 2-2, 17-6
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