HP 1920 Series User Manual page 209

Downloaded from www.Manualslib.com
Item Description
Sets the priority and path cost of the port in the current MSTI:
•
Priority—The priority of a port is an important factor in determining whether the port
can be elected as the root port of a device. If all other conditions are the same, the
Instance port with the highest priority will be elected as the root port. On an MSTP-enabled
(Instance ID, device, a port can have different priorities in different MSTIs, and the same port can
Port Priority, play different roles in different MSTIs, so that data of different VLANs can be
Auto Path propagated along different physical paths, implementing per-VLAN load balancing.
Cost, and You can set port priority values based on the actual networking requirements.
Manual Path
•
Path cost—A parameter related to the rate of a port. On an MSTP-enabled device, a
Cost)
port can have different path costs in different MSTIs. Setting appropriate path costs
allows VLAN traffic flows to be forwarded along different physical links, achieving
VLAN-based load balancing. The device can automatically calculate the default
path cost. Alternatively, you can also manually configure path cost for ports.
•
Point to Point
SpecifIes whether the port is connected to a point-to-point link:
Auto—Configures the device to automatically detect whether or not the link type
of the port is point-to-point.
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.
If a port is configured as connecting to a point-to-point link, the setting takes effect on the
port in all MSTIs. If the physical link to which the port connects is not a point-to-point link
and you force it to be a point-to-point link by configuration, the configuration might incur
a temporary loop.
Advanced
•
Transmit Limit—Configures 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 that you use the default value.
•
MSTP Mode—Sets whether 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 might not
be able to migrate automatically to the MSTP (or RSTP) mode, but will remain
operating in the STP-compatible mode. You can set this option to enable the port to
automatically migrate to the MSTP (or RSTP) mode.
Selects 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
Select port(s)
aggregate interfaces below the chassis front panel. You can select aggregate interfaces
from this list.
Table 61 Protection types
Protection type Description
Sets the port as an edge port.
Some ports of access layer devices are directly connected to PCs or file servers,
which cannot generate BPDUs. You can set these ports as edge ports to achieve
Edged Port fast transition for these ports.
HP recommends that you enable the BPDU guard function in conjunction with the
edged port function to avoid network topology changes when the edge ports
receive configuration BPDUs.
manuals search engine
196