Technical data

RackSwitch G8124 Command Reference
Chapter 4: Configuration Commands
 143BMD00076, January 2009
CIST Port Configuration
The following CIST port parameters are used to modify MSTP operation on an individual port
basis. CIST parameters do not affect operation of STP/PVRST+.
 Port priority
 Port path cost
 Port Hello time
 Link type
 Edge
 On and off
 Current port configuration
For each port, MSTP is turned on by default, and the CIST is active.
Table 4-32 CIST Port Configuration Commands
Command Syntax and Usage
spanning-tree mstp cist interface-priority {<0-240 in steps of 16>}
Configures the CIST port priority. The port priority helps determine which bridge port becomes
the designated port. In a network topology that has multiple bridge ports connected to a single seg-
ment, the port with the lowest port priority becomes the designated port for the segment.
The range is 0 to 240, in steps of 16 (0, 16, 32...), and the default value is 128.
Command mode: Interface port
spanning-tree mstp cist path-cost {<0-200000000>}
Configures the CIST port path cost. The port path cost is used to help determine the designated
port for a segment. Generally speaking, the faster the port, the lower the path cost.
The default value is 2000 for 10 Gigabit ports, 20000 for Gigabit ports.
Command mode: Interface port
spanning-tree mstp cist hello {<1-10>}
Configures the CIST port Hello time.The Hello time specifies how often the root bridge transmits
a configuration Bridge Protocol Data Unit (BPDU). Any bridge that is not the root bridge uses the
root bridge Hello value. The default value is two seconds.
Command mode: Interface port