S
PANNING
T
REE
A
LGORITHM
C
ONFIGURATION
3-155
Trunk Member
– Indicates if a port is a member of a trunk.
(STA Port Information only)
These additional parameters are only displayed for the CLI:
•
Admin status
– Shows if this interface is enabled.
•
Path cost
– The path cost for the IST. This parameter is used by the
STA to determine the best path between devices. Therefore, lower
values should be assigned to ports attached to faster media, and higher
values assigned to ports with slower media. (Path cost takes
precedence over port priority.)
•
Priority
– Defines the priority used for this port in the Spanning Tree
Algorithm. If the path cost for all ports on a switch is the same, the
port with the highest priority (i.e., lowest value) will be configured as
an active link in the Spanning Tree. This makes a port with higher
priority less likely to be blocked if the Spanning Tree Algorithm is
detecting network loops. Where more than one port is assigned the
highest priority, the port with the lowest numeric identifier will be
enabled.
Alternate port receives more
useful BPDUs from another
bridge and is therefore not
selected as the designated
port.
x
R: Root Port
A: Alternate Port
D: Designated Port
B: Backup Port
R
R
A
D
B
Backup port receives more
useful BPDUs from the same
bridge and is therefore not
selected as the designated
port.
x
R
R
A
D
B
Summary of Contents for 6152L2
Page 2: ......
Page 18: ...TABLES xiv ...
Page 32: ...INTRODUCTION 1 10 ...
Page 46: ...INITIAL CONFIGURATION 2 14 ...
Page 185: ...PORT CONFIGURATION 3 139 Figure 3 61 Displaying Etherlike and RMON Statistics ...
Page 249: ...QUALITY OF SERVICE 3 203 Figure 3 90 Configuring Policy Maps ...
Page 290: ...CONFIGURING THE SWITCH 3 244 ...
Page 303: ...COMMAND GROUPS 4 13 VC VLAN Database Configuration ...
Page 434: ...COMMAND LINE INTERFACE 4 144 ...
Page 568: ...TROUBLESHOOTING B 4 ...
Page 581: ......