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The network administrator is adding a new N1Kv to the vCenter， however， the administrator does not see the new switch under the networking tab of vCenter. 
 
The administrator issues the following command on the VSM to troubleshoot： 
   
 
VSM# show svs connections 
connection VC： 
ip address： 10.10.10.30 
remote port： 80 
protocol： vmware-vim https 
certificatE. default 
datacenter namE. DC1 
DVS uuiD. 67 32 30 50 a6 d2 49 64-9e 1c 5f 49 e3 af 55 99 
config status： Disabled 
operational status： Disconnected sync status： - 
version： - 
   
 
When attempting to fix the issue， the following error is seen： 
   
 
VSM-PRI-188# conf 
 
VSM-PRI-188（config）# svs connection VC 
VSM-PRI-188（config-svs-conn）# connect 
ERROR： [VMWARE-VIM] Extension key was not registered before its use 
   
 
What is the cause of the error？（）

Given the following configuration： 
port-profile type ethernet DATA-UPLINK  
vmware port-group 
switchport trunk allowed vlan 1-3967，4048-4093 
channel-group auto mode on 
no shutdown 
state enabled 
port-profile type ethernet MGMT-UPLINK 
vmware port-group 
 
switchport trunk allowed vlan 10-12 
channel-group auto mode on 
no shutdown 
state enabled 
 
  
VEMs are seen to be joining and then are lost from the Cisco VSM. How would you resolve this issue？（）