Netgear GS728TP User Manual download pdf (Page 524)

100

101

Configuration Examples

524

ProSafe M5300 Switch

If you do not specify a root bridge and all switches have the same Bridge Priority value,

the switch with the lowest MAC address is elected as the root bridge (see

CST

Configuration on page 146).

5. From the CST Port Configuration screen, select ports 1/0/1 - 1/0/8 and select Enable from

the STP Status menu (see

CST Port Configuration on page 148).

6. Click APPLY.

7. Select ports 1/0/1 - 1/0/5 (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 APPLY.

You can use the CST Port Status screen to view spanning tree information about each

port.

9. From the MST Configuration screen, create a MST instances with the following settings:

• MST ID: 1

• Priority: Use the default (32768)

• VLAN ID: 300

For more information, see MST Configuration on page 151.

10. Click ADD.

11. Create a second MST instance with the following settings

• MST ID: 2

• Priority: 49152

• VLAN ID: 500

12. Click ADD.

In this example, assume that Switch 1 has become the Root bridge for the MST instance 1,

and Switch 2 has become the Root bridge for MST instance 2. Switch 3 has hosts in the

Sales department (ports 1/0/1, 1/0/2, and 1/0/3) and in the HR department (ports 1/0/4 and

1/0/5). Switches 1 and 2 also have hosts in the Sales and Human Resources departments.

The hosts connected from Switch

2 use VLAN 500, MST instance 2 to communicate with the

hosts on Switch 3 directly. Likewise, hosts of Switch 1 use VLAN 300, MST instance 1 to

communicate with the hosts on Switch 3 directly.

The hosts use different instances of MSTP to effectively use the links across the switch. The

same concept can be extended to other switches and more instances of MSTP.

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