220
C
HAPTER
11: C
ONFIGURING
S
PANNING
T
REE
the
Forwarding
state
when the port link is up. Fast Link optimizes the
STP protocol convergence. STP convergence can take 30-60 seconds
in large networks.
■
Root Guard
—
Restricts the interface from acting as the root port of the
switch.
■
Port State
— Displays the current STP state of a port. If enabled, the
port state determines what forwarding action is taken on traffic.
Possible port states are:
■
Forwarding
— Indicates that the port forwards traffic while
learning MAC addresses.
■
Port Role
— Displays the port role assigned by the STP algorithm to
provide to STP paths. The possible field values are:
■
Root
— Provides the lowest cost path to forward packets to the
root switch.
■
Designated
— The port or LAG through which the designated
switch is attached to the LAN.
■
Alternate
— Provides an alternate path to the root switch from the
root interface.
■
Backup
— Provides a backup path to the designated port path
toward the Spanning Tree leaves. Backup ports occur only when
two ports are connected in a loop by a point-to-point link, or when
a LAN has two or more connections connected to a shared
segment.
■
Disabled
— The port is not participating in the Spanning Tree.
■
Speed
— Indicates the speed at which the port is operating.
■
Path Cost
— Indicates the port contribution to the root path cost. The
path cost is adjusted to a higher or lower value, and is used to forward
traffic when a path is re-routed.
■
Priority
— Priority value of the port. The priority value influences the
port choice when a bridge has two ports connected in a loop. The
priority range is between 0 -240. The priority value is determined in
increments of 16.
■
Designated Bridge ID
— Indicates the bridge priority and the MAC
Address of the designated bridge.
■
Designated Port ID
— Indicates the selected port priority and
interface.
Summary of Contents for 3CRUS2475 24
Page 137: ...Defining LAG Membership 137...
Page 139: ...139 Defining Voice VLAN Defining GVRP...
Page 194: ...194 CHAPTER 9 CONFIGURING IP INFORMATION Static Indicates the ARP entry is a static entry...
Page 197: ...Defining ARP Interface Settings 197 Unchecked Maintains the current ARP entries...
Page 321: ...320 APPENDIX C TROUBLESHOOTING...
Page 329: ...328 APPENDIX GLOSSARY...
