Shows information about the bridge port extender (BPE) attached to the specified cascade ports.
| vpex | Specifies Virtual Port Extender (VPEX). | 
| ports | Specifies the cascade port attached to the BPE. | 
| port_list | Specifies the cascade port attached to the BPE. | 
If you do not specify any ports, information for all cascade ports appears.
In a redundant CB configuration, the M flag in the output of this command indicates the CB occupying the master role.
The following example shows information for BPEs attached to all cascade ports:
 # show vpex ports
Port    Cascade Ext  Port   Link   PECSP              PE                 CSPOpen
#       Port    Slot State  State  MAC Address        MAC Address        Loc Rem   Flags
===========================================================================================
1:45    1:45    100  E      A      d8:84:66:88:98:7f  d8:84:66:88:98:65  1   1
1:47    1:47    120  E      A      d8:84:66:88:99:14  d8:84:66:88:98:e3  1   1
1:48    1:47    120  E      A      d8:84:66:88:99:16  d8:84:66:88:98:e3  1   1
100:25  100:25  101  E      A      d8:84:66:88:99:1c  d8:84:66:88:99:03  1   1
101:26  101:26  122  E      A      d8:84:66:88:99:27  d8:84:66:88:98:f3  1   1
120:50  120:50  121  E      A      d8:84:66:88:98:e8  d8:84:66:88:98:b7  1   1
120:52  120:50  121  E      A      d8:84:66:88:98:e9  d8:84:66:88:98:b7  1   1
122:49  122:50  121  E      A      d8:84:66:88:99:22  d8:84:66:88:98:65  0   0       d
122:50  122:50  121  E      A      d8:84:66:88:99:20  d8:84:66:88:98:e3  0   0       d
===========================================================================================
   Port State: D-Disabled, E-Enabled, F-Disabled by link-flap detection,
               L-Disabled due to licensing
   Link State: A-Active, R-Ready, NP-Port Not Present, L-Loopback,
   Flags: B-CSP Role Backup, C-CSP Role State Complete, d-Dynamic Cascade Port, 
                   I-CSP Role State Init, M-CSP Role Master, T-CSP Role State Transitioning, U-Unknown.
    This command was first available in ExtremeXOS 22.5.
Ring topology support was added in ExtremeXOS 22.7
This command is available on ExtremeSwitching 5420 and 5520 series switches.