• A Network Switch Mapping Solution

How to Activate and Configure SNMP in a Cisco Small Business Series Switch

Problem: Cisco Small Business Series Switches are not configured for SNMP management 'out-of-the-box'.

Solution: Follow the procedures on this web page to activate SNMP, then configure SNMPv1, SNMPv2c and SNMPv3.

Mapping a standalone Cisco SG300-28 shows 874 ports, most are unused

Problem: you are mapping the switch and you see 8 groups of switch ports, both Fast Ethernet (fa prefix) and Gigabit Ethernet (gi prefix). Only the first set of Gigabit Ethernet ports actually have any data on them. All the other port show I/F Not Present in the Status column.

Solution: your switch is capable of an 8 switch stack and it is reporting as though it is in 8 switch stacked mode even though it is running in standalone mode. You have to change a setting in the switch so that it reports in standalone mode. The default switch configuration is 'Native Stacking' as of software version This may change in later software versions.


  1. Login to the switch using your web browser.
  2. On the left side menu bar locate 'Administration', 'System Mode and Stack Management', place a tick in the box before 'Stack Unit Number' of 1, and it unlocks the 'Stack Unit Mode' selector drop-down box.
  3. The default is 'Native Stacking', and when unlocked the choices are 'Standalone', 'Native Stacking', 'Basic Hybrid Stacking', and 'Advanced Hybrid Stacking'. Select 'Standalone'.
  4. You will be asked to save and reboot. When reboot is complete, the switch should map with the expected 28 ports, 32 trunks and 16 tunnels.