HP A5120 EI Series Configuration Guide

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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.
Make this configuration on the leaf nodes only.
Follow these steps to configure the priority of a port or a group of ports:
To do...
Use the command...
Remarks
Enter system view
system-view
—
Enter interface
view or port
group view
Enter Ethernet interface
view or Layer 2
aggregate interface view
interface interface-type
interface-number
Required
Use either command.
Enter port group view
port-group manual port-
group-name
Configure the port priority
stp [ instance instance-id ]
port priority priority
Required
128 for all ports by default.
NOTE:
 When the priority of a port changes, MSTP re-calculates the role of the port and initiates a state transition.
 A lower priority value indicates a higher priority. If you configure the same priority value for all the ports on a
device, the specific priority of a port depends on the index number of the port. A lower index number means a
higher priority. Changing the priority of a port triggers a new spanning tree calculation process.
Configuring the link type of ports
A point-to-point link is a link that directly connects two devices. If the two ports across a point-to-point link
are root ports or designated ports, the ports can rapidly transition to the forwarding state after a
proposal-agreement handshake process.
Make this configuration on the root bridge and on the leaf nodes separately.
Follow these steps to configure the link type of a port or a group of ports:
To do...
Use the command...
Remarks
Enter system view
system-view
—
Enter interface
view or port
group view
Enter Ethernet
interface view or
Layer 2 aggregate
interface view
interface interface-type
interface-number
Required
Use either command.
Enter port group view
port-group manual port-group-
name
Configure the link type of ports
stp point-to-point { auto |
force-false | force-true }
Required
By default, the port
automatically detects whether
its link is point-to-point.

HP A5120 EI Series Specifications

General

Uplink Ports	4 x SFP
Stacking	No
Management	CLI, Web, SNMP
Routing Protocols	RIP, OSPF
Power Supply	AC
MAC Address Table Size	16K
Dimensions	440 x 430 x 44 mm
Operating Temperature	0°C to 45°C
Operating Humidity	10% to 90% non-condensing
Model	HP A5120-24G EI Switch (JG234A)
VLANs	4094