This command displays current and historical CFM session missed-hellos statistics.
| domain_name | IEEE 802.1ag domain name. | 
| association_name | IEEE 802.1ag or ITU-T Y.1731 association name. | 
| ports | Specifiy ports to show. | 
| port_list | List of ports to show. | 
| end-point | Show MEPs (Maintenance association End Point). | 
| up | End point is up. | 
| down | End point is down. | 
| history | Historical set of bins. | 
| no-refresh | Page by page display without continuous refresh. | 
| refresh | Continuous refresh of output. | 
Refresh.
None.
The following example show the current statistics with no-refresh:
# show cfm session counters missed-hellos no-refresh
         1        2         3         4         5        6         7         8
12345678901234567890123456789012345678901234567890123456789012345678901234567890
================================================================================
Session ID        Port   Remote End-Point  Interval  Missed  Missed   Down Flags
                         MAC Address        (msec)     Once   Twice
================================================================================
3-4000-1111-6666  4      00:11:22:33:44:55      3.3    ---     ---   >9999  DHIs
3-4000-2222-6666  6      00:11:22:33:44:55    10000   >9999   >9999  >9999  DSIs
3-4001-3333-7777  5      00:66:77:88:99:aa   600000   >9999   >9999  >9999  USAs
================================================================================
Session ID: MD Level-VLAN ID-Local MEP ID-Remote MEP ID
Flags: Maintenance Point: (U) Up, End-Point, (D) Down End-Point
       Session Type: (S) Software, (H) Hardware
       Status: (A) Active, (I) Inactive
       Remote End-Point MAC Address: (d) dynamic, (s) static
 
      The following example displays current statistics with refresh.
# show cfm session counters missed-hellos
================================================================================
Session ID        Port    Remote End-Point  Interval  Missed  Missed  Down  Flags
                            MAC Address     (msec)     once    twice
================================================================================
3-4000-1111-6666  4      00:11:22:33:44:55      3.3    ---     ---   >9999  DHIs
3-4000-2222-6666  6      00:11:22:33:44:55    10000   >9999   >9999  >9999  DSIs
3-4001-3333-7777  5      00:66:77:88:99:aa   600000   >9999   >9999  >9999  USAs
================================================================================
Session ID: MD Level-VLAN ID-Local MEP ID-Remote MEP ID
Flags: Maintenance Point: (U) Up End-Point, (D) Down End-Point
       Session Type: (S) Software, (H) Hardware
       Status: (A) Active, (I) Inactive
       Remote End-Point MAC Address: (d) dynamic, (s) static
       0->Clear Counters  U->page up  D->page down ESC->exit
#
    This command was first available in ExtremeXOS 16.1.
This command is available on all ExtremeSwitching Universal switches.