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IN-49
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02
STP (continued)
BPDU message exchange
18-3
configuration guidelines 18-13, 20-12
configuring
forward-delay time
18-23
hello time 18-22
maximum aging time 18-23
path cost 18-20
port priority 18-18
root switch 18-16
secondary root switch 18-18
spanning-tree mode 18-15
switch priority 18-21
transmit hold-count 18-24
counters, clearing 18-24
cross-stack UplinkFast
described
20-5
enabling 20-16
default configuration 18-13
default optional feature configuration 20-12
designated port, defined 18-4
designated switch, defined 18-4
detecting indirect link failures 20-8
disabling 18-16
displaying status 18-24
EtherChannel guard
described
20-10
disabling 20-17
enabling 20-17
extended system ID
effects on root switch
18-16
effects on the secondary root switch 18-18
overview 18-4
unexpected behavior 18-16
features supported 1-7
IEEE 802.1D and bridge ID 18-4
IEEE 802.1D and multicast addresses 18-9
IEEE 802.1t and VLAN identifier 18-5
inferior BPDU 18-3
STP (continued)
instances supported
18-10
interface state, blocking to forwarding 20-2
interface states
blocking
18-7
disabled 18-8
forwarding 18-6, 18-7
learning 18-7
listening 18-7
overview 18-5
interoperability and compatibility among
modes
18-11
keepalive messages 18-2
Layer 2 protocol tunneling 17-8
limitations with IEEE 802.1Q trunks 18-11
load sharing
overview
13-24
using path costs 13-26
using port priorities 13-24
loop guard
described
20-11
enabling 20-18
modes supported 18-10
multicast addresses, effect of 18-9
optional features supported 1-7
overview 18-2
path costs 13-26, 13-27
Port Fast
described
20-2
enabling 20-12
port priorities 13-25
preventing root switch selection 20-10
protocols supported 18-10
redundant connectivity 18-9
root guard
described
20-10
enabling 20-18
root port, defined 18-3
root port selection on a switch stack 18-3