[c-nsp] sh mac-addr dyn times out

[C and C Dominte]

I recently configured two Catalyst 6509 switches in a VSS
cluster. When I am issuing the command “show mac-address-table dynamic”, I’m
getting the following output:
 
Legend: * - primary entry
        age - seconds
since last seen
        n/a - not
available
 
  vlan   mac address    
type    learn    
age             
ports
------+----------------+--------+-----+----------+--------------------------
MAC entries unavailable, please try later!
No entries present.
 
The command is issued periodically (every 5 minutes), to
read the MAC address table. After the VSS cluster was configured, I used to get
this output once in a while, but after a few weeks, almost every time this
command is issued, it returns this error. This did not happen before the
cluster was in place.
 
Has anyone experienced anything similar?
 
Thank you
 
Catalin