Command Reference Guide

N8406-023 1Gb Intelligent L3 Switch Command Reference Guide (AOS) 109
CIST port configuration
Command: /cfg/l2/mrst/cist/port <port number>
[CIST Port 1 Menu]
prior - Set port Priority (0-240)
cost - Set port Path Cost (1-200000000, 0 for auto)
hello - Set CIST port Hello Time (1-10 secs)
link - Set MSTP link type (auto, p2p, or shared; default: auto)
edge - Enables or disables edge port
on - Turn port's Spanning Tree ON
off - Turn port's Spanning Tree OFF
cur - Display current port Spanning Tree parameters
CIST port parameters are used to modify MST operation on an individual port basis. CIST parameters do not affect
operation of STP/PVST+.
Port parameters include:
Port priority
Port path cost
Port Hello time
Link type
Edge
On and off
Current port configuration
The following table describes the commands used to configure CIST Port Configuration Menu options.
Table 110 CIST Port Configuration Menu options
Command
Description
prior <0-240>
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 segment, 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 is 128.
cost <1-200000000>
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 is 20000 for Gigabit ports.
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 range is 1 to 10
seconds, and the default is 2 seconds.
link auto|p2p|shared
Defines the type of link connected to the port, as follows:
auto: Configures the port to detect the link type, and automatically match its
settings.
p2p: Configures the port for Point-To-Point protocol.
shared: Configures the port to connect to a shared medium (usually a hub).
The default link type is auto.
edge disable|enable
Enables or disables this port as an edge port. An edge port is not connected to a
bridge, and can begin forwarding traffic as soon as the link is up. Configure server
ports as edge ports (enabled). By default, Ports 1-16 are configured as edge
ports.
On
Enables CIST on the port. This is the default for Ports 17-18 and 20-24.
Off
Disables CIST on the port.
Cur
Displays the current CIST port configuration.