H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 178)

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Table 53 Configuration items of configuring MSTP on a port
Item Description
STP Select whether to enable STP on the port.
Protection
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 Table
54 .
Instance
Instance ID 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 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, 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, achieving VLAN-based load balancing. The device can
automatically calculate the default path cost; alternatively, you can also
manually configure path cost for ports.
Port
Priority
Auto Path
Cost
Manual
Path Cost
Advanced
Point to
Point
Specify whether the port is connected to a point-to-point link.
• Auto: Automatically detects whether the link type of the port is point-to-point.
• Force False: Specifies that the link type for the port is not point-to-point link.
• Force True: Specifies that 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 and you force it to be a point-to-point link by configuration, the
configuration may incur a temporary loop.
Transmit
Limit
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. H3C
recommends that you use the default value.
MSTP
Mode
Set 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 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 port(s)
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.