HP FlexNetwork NJ5000, User Manual

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164
Item Description
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.
•
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.
Hewlett Packard Enterprise 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.
Select port(s)
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 aggregate interfaces below the chassis front panel. You can select aggregate
interfaces from this list.
Table 67 Protection types
Protection type Description
Edged Port
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 fast transition for these ports.
Hewlett Packard Enterprise 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.
Root Protection
Enables the root guard function.
Configuration errors or attacks might result in configuration BPDUs with their
priorities higher than that of a root bridge, which causes a new root bridge to be
elected and network topology change to occur. The root guard function is used
to address such a problem.
Loop Protection
Enables the loop guard function.
By keeping receiving BPDUs from the upstream device, a device can maintain
the state of the root port and other blocked ports. These BPDUs might get lost
because of network congestion or unidirectional link failures. The device will
re-elect a root port, and blocked ports might transit to the forwarding state,
causing loops in the network. The loop guard function is used to address such a
problem.
Displaying MSTP information of a port
1.
From the navigation tree, select
Network
>
MSTP
.
2.
Click the
Port Summary
tab.
3.
Select a port on the chassis front panel.