Справочник Пользователя для RuggedCom RS1600

RuggedSwitch

™ User Guide 

2.  Identify required legacy support and ports with half duplex/shared media 

restrictions.   
These bridges should not be used if network failover/recovery times are to be 
minimized. 

3.  Identify edge ports  

Ports that connect to host computers, IEDs and controllers may be set to edge ports in 
order to guarantee rapid transitioning to forwarding as well as reduce the number of 
topology change notifications in the network.  

4.  Choose the root bridge. 

The root bridge can be selected to equalize either the number of bridges, number of 
stations or amount of traffic on either of its legs.  It is important to realize that the ring 
will always be broken in one spot and that traffic always flows through the root 

5.  Assign bridge priorities to the ring. 

The strategy that should be used is to assign each bridge’s priority to correspond to its 
distance from the root bridge.  If the root bridge is assigned the lowest priority of 0, 
the bridges on either side should use a priority of 4096 and the next bridges 8192 and 
so on.  As there are 16 levels of bridge priority available, this method provides for up 
to 31 bridges in the ring.  

RSTP Port Redundancy 

In cases where port redundancy is essential, RSTP allows more than one bridge 
port to service a LAN.  For example if port 3 is designated to carry the network 
traffic of LAN A, port 4 will block.  Should an interface failure occur on port 3, 
port 4 would assume control of the LAN. 

 

 

 

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