HP V1910 User Manual page 207

Item
Protection
Instance ID
Port
Priority
Auto Path
Cost
Instance
Manual
Path Cost
Point to
Point
Advanced
Transmit
Limit
MSTP
Mode
Select port(s)
Description
Set the type of protection to be enabled on the port:

Not Set—No protection is enabled on the port.

Edged Port, Root Protection, Loop Protection—For more information, see 3.
Set the priority and path cost of the port in the current MSTI.

The priority of a port is an important factor in determining whether or not the
port can be elected as the root port of a device. If all other conditions are the
same, the port with the highest priority will be elected as the root port. On an
MSTP-enabled device, a port can have different priorities in different MSTIs,
and the same port can play different roles in different MSTIs, so that data of
different VLANs can be propagated along different physical paths, thus
implementing per-VLAN load balancing. You can set port priority values based
on the actual networking requirements.

Path cost is a parameter related to the rate of a port. On an MSTP-enabled
device, a port can have different path costs in different MSTIs. Setting
appropriate path costs allows VLAN traffic flows to be forwarded along
different physical links, thus achieving VLAN-based load balancing. The device
can automatically calculate the default path cost; alternatively, you can also
manually configure path cost for ports.
Specify whether or not the port is connected to a point-to-point link:

Auto—The link type of the port is automatically detected.

Force False—The link type for the port is not point-to-point link.

Force True—The link type for the port is point-to-point link.
IMPORTANT:
If a port is configured as connecting to a point-to-point link, the setting takes effect for
the port in all MSTIs. If the physical link to which the port connects is not a
point-to-point link but you force it to be a point-to-point link by configuration, the
configuration may cause a temporary loop.
Configure the maximum number of MSTP packets that can be sent during each
hello interval.
The larger the transmit limit is, the more network resources will be occupied. HP
recommends you to use the default value.
Set whether or not the port migrates to the MSTP mode.
In a switched network, if a port on an MSTP (or RSTP) device connects to a device
running STP, this port will automatically migrate to the STP-compatible mode. After
the device running STP is removed, the port on the MSTP (or RSTP) device may not
be able to migrate automatically to the MSTP (or RSTP) mode, but will remain
working in the STP-compatible mode. You can set this option to enable the port to
automatically migrate to the MSTP (or RSTP) mode.
Select one or multiple ports on which you want to configure MSTP on the chassis
front panel. If aggregate interfaces are configured on the device, the page displays
a list of aggregate interfaces below the chassis front panel. You can select
aggregate interfaces from this list.
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