HP 5900 Configuration Guide

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Figure 5 Priority mapping procedure for an Ethernet packet
For information about priority marking, see "Configuring priority marking."
Priority mapping configuration tasks
You can modify priority mappings by modifying priority mapping tables, priority trust mode on a port,
and port priority.
To configure priority mapping, perform the following tasks:
Tasks at a
g
lance
(Optional.) Configuring a priority map
(Required.) Perform one of the following tasks:
• Configuring a port to trust packet priority for priority mapping
• Changing the port priority of an interface
Which priority is
trusted on the port?
Receive a
packet on a port
Use port priority
as 802.1p priority
for priority
mapping
No
Look up dot1p-dp and
dot1p-lp mapping
tables
Mark the packet
with local
precedence or drop
precedence
Is the packet
802.1q tagged?
Yes
DSCP in packets
Look up dscp-dp,
dscp-dot1p, and
dscp-dscp mapping
tables
802.1p in
packets
Mark the packet
with 802.1p priority,
drop precedence,
and new DSCP
precedence
Look up dot1p-lp
mapping table
Mark the packet with
local precedence
Look up dot1p-dp and
dot1p-lp mapping
tables
Mark the packet
with local
precedence or drop
precedence
Schedule the packet
according to its local
and drop precedence
Use port priority
as 802.1p priority
for priority
mapping
Look up dot1p-dp and
dot1p-lp mapping
tables
Mark the packet
with local
precedence or drop
precedence
Port priority
Does the packet match
conditions for local
precedence or drop
precedence marking?
Mark it with local
precedence or drop
precedence
Yes
No

HP 5900 Specifications

General

Model	HP 5900
Rack Mountable	Yes
MAC Address Table Size	128K
Jumbo Frame Support	Yes
Routing Protocol	OSPF, BGP, RIP, IS-IS, IGMP
Remote Management Protocol	SNMP, CLI
Features	Quality of Service (QoS), Jumbo Frames support, IPv4 support, IPv6 support
Operating Temperature	0 °C to 45 °C
Operating Humidity	10% to 90% non-condensing
Power Supply	Internal power supply - hot-plug / redundant