Siemens S223 - Manual (Page 218)

UMN:CLI User Manual
SURPASS hiD 6615 S223/S323 R1.5
218 A50010-Y3-C150-2-7619
8.3.6.2 Root Switch
In order establish PVSTP, PVRSTP function, first of all, Root switch should be decided.
Each switch has its own Bridge ID and Root switch on same LAN is decided by compar-
ing their Bridge ID. However, the user can change Root switch by configuring Priority for it.
The switch having the lowest priority is decided as Root switch.
To change Root switch by configuring Priority for it, use the following command.
Command Mode Description
stp pvst priority VLAN-RANGE
<0-61440>
Configures a priority of switch.
no stp pvst priority
VLAN-RANGE
Bridge
Clears a priority of switch.
8.3.6.3 Path-cost
After deciding Root switch, you need to decide to which route you will forward the packet.
To do this, the standard is path-cost. Generally, path-cost depends on transmission speed
of LAN interface in switch. In case the route is overload based on Path-cost, it is better to
take another route.
By considering the situation, the user can configure Path-cost of Root port in order to des-
ignate the route on ones own. To configure Path-cost, use the following command.
Command Mode Description
stp pvst path-cost VLAN-RANGE PORTS
<1-200000000>
Configures path-cost to configure route
on user’s own.
no stp pvst path-cost VLAN-RANGE PORTS
Bridge
Clears path-cost configuration.
8.3.6.4 Port-priority
When all conditions of two switches are same, the last standard to decide route is port-
priority. It is also possible to configure port priority so that user can configure route manu-
ally. To configure port priority, use the following command.
Command Mode Description
stp pvst port-priority
VLAN-RANGE PORTS <0-240>
Configures port-priority.
no stp pvst port-priority
VLAN-RANGE PORTS
Bridge
Disables port priority configuration.