User's Manual

Smart Managed Pro Switches MS510TX and MS510TXPP
Configuration Examples User Manual348
2. On the VLAN Membership page, include ports g1–mg7 as tagged (T) or untagged (U)
members of VLAN 300 and VLAN 500 (see
Configure VLAN Membership on page 99).
3. On the STP Configuration page, enable the Spanning Tree State option (see Configure STP
Settings on page 118).
Use the default values for the rest of the STP configuration settings. By default, the STP
operation mode is MSTP and the configuration name is the switch MAC address.
4. On the CST Configuration page, set the bridge priority value for each of the three switches
to force Switch 1 to be the root bridge:
• Switch 1. 4096
• Switch 2. 12288
• Switch 3. 20480
Note: Bridge priority values are multiples of 4096.
If you do not specify a root bridge and all switches are assigned the same bridge priority
value, the switch with the lowest MAC address is elected as the root bridge (see
Configure CST Settings on page 120).
5. On the CST Port Configuration page, select ports g1–mg7 and select Enable from the STP
Status menu (see
Configure CST Port Settings on page 122).
6. Click the Apply button.
7. Select ports g1–mg5 (edge ports), and select Enable from the Fast Link menu.
Since the edge ports are not at risk for network loops, ports with Fast Link enabled
transition directly to the forwarding state.
8. Click the Apply button.
You can use the CST Port Status page to view spanning tree information about each port.
9. On the MST Configuration page, create a MST instances with the following settings:
• MST ID. 1
• Priority. Use the default (32768)
• VLAN ID. 300
For more information, see Manage MST Settings on page 125.
10. Click the Add button.
11. Create a second MST instance with the following settings
• MST ID. 2
• Priority. 49152
• VLAN ID. 500
12. Click the Add button.
In this example, assume that switch 1 became the root bridge for the MST instance 1, and
switch 2 became the root bridge for MST instance 2. Switch 3 supports hosts in the sales
department (ports g1, g2, and g3) and in the HR department (ports g4 and mg5). Switches 1