3com 4210 PWR 9-Port 3CR17341-91-ME ユーザーズマニュアル

C

HAPTER

 14: MSTP C

ONFIGURATION

manufacturer’s switch running proprietary spanning tree protocols, you can enable 
the rapid transition feature on the ports of the 3Com series switch operating as 
the downstream switch. Among these ports, those operating as the root ports will 
then send agreement packets to their upstream ports after they receive proposal 
packets from the upstream designated ports, instead of waiting for agreement 
packets from the upstream switch. This enables designated ports of the upstream 
switch to change their states rapidly.

As shown in Figure 53, a 3Com series switch is connected to another 
manufacturer’s switch. The former operates as the downstream switch, and the 
latter operates as the upstream switch. The network operates normally.

The upstream switch is running a proprietary spanning tree protocol that is similar 
to RSTP in the way to implement rapid transition on designated ports. Port 1 is the 
designated port.

The downstream switch is running MSTP. Port 2 is the root port.

Figure 53   Network diagram for rapid transition configuration

1 Configure the rapid transition feature in system view

2 Configure the rapid transition feature in Ethernet port view

Table 136   Configure the rapid transition feature in system view

Enter system view 

system-view 

- 

Enable the rapid transition 
feature 

stp interface interface-type 
interface-number 
no-agreement-check 

Required

By default, the rapid transition 
feature is disabled on a port.

Table 137   Configure the rapid transition feature in Ethernet port view

Enter system view 

system-view 

-