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Chapter 20
Checking Status and Connectivity
This example shows how to display the MAC addresses of all ports on a module:
Console> show port mac-address 4
Port
----- ----------------------
4/1
4/2
4/3
4/4
4/47 00-50-54-bf-59-92
4/48 00-50-54-bf-59-93
Displaying the Duplicate MAC Entries in the CAM Table
You can track multiple E-LAN VLANs and VLAN loops using the MAC duplication indicator (&)
displayed next to the MAC entries that appear more than once in the CAM table.
To display the duplicate MAC entries in the CAM table, perform these tasks in enabled mode:
Task
Display all duplicate MAC addresses in the CAM
table.
Display only the dynamic MAC addresses with
the duplicate indicator (&)
The show cam static | permanent commands also display MAC entries with the duplicate indicator (&).
This example shows how to display all duplicate MAC entries in the CAM table:
Console> (enable) show cam duplicate
* = Static Entry. + = Permanent Entry. # = System Entry. R = Router Entry. X = Port
Security Entry $ = Dot1x Security Entry M = Mac-Auth-Bypass Entry & = Duplicate MAC entry
42
Total Matching CAM Entries Displayed = 2
========================================================================
If the show cam duplicate command delays the printing of duplicate entries, some of the entries might
Note
age out before the print operation is complete.
This example shows how to display only the dynamic MAC addresses with the duplicate indicator (&):
Console> (enable) show cam dynamic
* = Static Entry. + = Permanent Entry. # = System Entry. R = Router Entry. X = Port
Security Entry $ = Dot1x Security Entry M = Mac-Auth-Bypass Entry & = Duplicate MAC entry
OL-8978-04
Mac address
00-50-54-bf-59-64
00-50-54-bf-59-65
00-50-54-bf-59-66
00-50-54-bf-59-67
VLAN
Dest MAC/Route Des
----
------------------
00-d0-02-83-eb-89
&
142
00-d0-02-83-eb-89
42
d8-d9-02-83-ef-ff
3
d8-d9-02-83-ef-ff
VLAN
Dest MAC/Route Des
----
------------------
Displaying the Duplicate MAC Entries in the CAM Table
Command
show cam duplicate
show cam dynamic [mod[/port]]
Destination Ports or
[CoS]
Age
VCs / [Protocol Type]
-----
----------
---------------------
3/3
&
5/3
&
2/3
&
3/4
Destination Ports or
[CoS]
Age
VCs / [Protocol Type]
-----
----------
---------------------
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
20-5
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Troubleshooting
