Spanning Tree Port Configuration - HP 445860-B21 - 10Gb Ethernet BL-c Switch Command Reference Manual

When configuring STP bridge parameters, the following formulas must be used:
2*(fwd-1) ≥ mxage
2*(hello+1) ≤ mxage

Spanning Tree port configuration

Command: /cfg/l2/stp <1-128>/port <port number>
[Spanning Tree Port 1 Menu]
The default configuration for STP/PVST+ is off for downlink ports (1-16) and the management port (17),
and on for uplink ports (18-21). The default configuration for RSTP/MSTP is Spanning Tree off for all
downlink ports (1-16) and the management port (17), and on for all uplink ports (18-21), with downlink
ports configured as edge ports.
Spanning tree port parameters are used to modify STP operation on an individual port basis. STP port
parameters include:
Port priority
Port path cost
The following table describes the Spanning Tree Port Configuration Menu options.
Table 112 Spanning Tree Port Configuration Menu options
Command
prior <0-255>
cost <1-65535>
prior - Set port Priority (0-255)
cost - Set port Path Cost (1-65535 (802.1d) /
1-200000000 (MSTP/RSTP)/0 for auto)
link - Set port link type (auto, p2p, or shared; default: auto)
edge - Enables or disables this port as an edge port
fastfwd - Enable/disable Port Fast Forwarding mode
on - Turn port's Spanning Tree ON
off - Turn port's Spanning Tree OFF
cur - Display current port Spanning Tree parameters
Description
Configures the 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 255, and the default is 128.
RSTP/MSTP: The range is 0 to 240, in steps of 16 (0, 16, 32...) and the default
is 128.
Configures the 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 range is 1 to 65535. The default is 100 for 10Mb ports, 10 for 100 Mb
ports, 4 for Gigabit ports, and 2 for 10Gb ports.
A value of 0 indicates that the default cost will be computed for an auto-
negotiated link speed.
RSTP/MSTP: The range is 1 – 200000000, and the default it 20000 for Gigabit
ports, 2000 for 10Gb ports.
Configuration Menu
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