No GLC-SX-MMD is not supported by SMB switches. pls check below link: http://www.cisco.com/c/en/us/products/collateral/switches/small-business-smart-switches/data_sheet_c78-610061.html

Hi, Can you advise if the SG550XG-8F8T-K9-NA can be stacked with the SG500X-48-k9-NA? Answer for this question is: NO Yes ,SG550XG-8F8T-K9-NA  is supported for stacking with same family switch models with any SG550XG. regards

Hi, Kindly check whether switch gateway(192.168.99.X- sub-net) is reachable or not  from department subnet(10.10.10.X) regards 

Hi, Dont use VLAN 100 for Cameras .Since its default vlan for voice in SG300.Try to create different VALN XX (other than 1 and 100). Configure port as below:(where cameras are connected)conf#int vlan XXconf-int#switchport mode access vlan xx regardsM...

Hi, Kindly create the TAC case to get support over phone:(Need to check the device over remote) Out TAC contact details:(Link provided)http://www.cisco.com/c/en/us/support/web/tsd-cisco-small-business-support-center-contacts.html regards