Specifications

show switchport backup mac-address-table update
560
show switchport backup mac-address-table update
Displays information about MAC address update frames.
Syntax
show switchport backup mac-address-table update
Input mode
User mode and administrator mode
Parameters
None
Example
Figure 31-4 Example of displaying statistics about the MAC address update frames
> show switchport backup mac-address-table update
Date 2010/01/09 18:02:40 UTC
Startup active port selection: primary only
Switchport backup pairs Preemption Retransmit
Primary Status Secondary Status Delay Limit
Port 0/1 Down Port 0/2 Forwarding 0 - -
VLAN : 1,101-149,151-200,2001-2049,2051-2100,4040-4049,4051-4094
Exclude-VLAN : 50,150,1050,2050,3050,4050
Switchport backup pairs Preemption Retransmit
Primary Status Secondary Status Delay Limit
Port 0/25 Down Port 0/26 Forwarding 0 - 3
VLAN : 1,101-149,151-200,2001-2049,2051-2100,4040-4049,4051-4094
Exclude-VLAN : 50,150,1050,2050,3050,4050
Switchport backup pairs Preemption Retransmit
Primary Status Secondary Status Delay Limit
ChGr 1 Down ChGr 2 Forwarding 0 - 3
VLAN : 1,101-149,151-200,2001-2049,2051-2100,4040-4049,4051-4094
Exclude-VLAN : 50,150,1050,2050,3050,4050
>
Display items
Table 31-5 Information displayed for MAC address update frames
Item Meaning Displayed information
Startup active port selection Setting of the functionality that
permanently assigns the active
port at device startup
primary only: The functionality that
permanently assigns the active port at
device startup is enabled.
This item is displayed only when this
functionality is enabled.
Switchport
backup pairs
Primary The number of the primary port
or the channel group
If an asterisk (*) is displayed, the port is an
uplink port and the secondary port cannot
be used for communication because the
functionality that permanently assigns the
active port at device startup is enabled.