HP 5500 Ei 5500 Si Switch Series Configuration Guide

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The default priority mapping tables (see Appendix A Default priority mapping tables ) are available for 
priority mapping. In most cases, they are adequate for priority mapping. If a default priority mapping 
table cannot meet your requirements, you can modify the priority mapping table as required.  
Priority trust mode on a port 
The priority trust mode on a port decides which priority is used for priority mapping table lookup. Port 
priority was introduced to use for priority mapping in addition...

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Figure 6 Priority mapping procedure for an Ethernet packet 
 
 
The priority mapping procedure shown in Figure 6 applies in the absence of priority marking. If priority 
marking is configured, the switch performs priority marking before priority mapping. The switch then uses 
the re-marked packet-carried priority for priority mapping or directly uses the re-marked scheduling 
priority for traffic scheduling depending on your configuration. Neither priority trust mode configuration 
on the port nor...

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Step Command Remarks 
1.  Enter system view. 
system-view N/A 
2.  Enter priority 
mapping table 
view.   qos map-table 
{ dot1p-dp |  dot1p-lp | dscp-dot1p  | 
dscp-dp |  dscp-dscp }  N/A
 
3.  Configure the 
priority mapping 
table.   import
 import-value-list  export export-value   Newly configured 
mappings overwrite the 
old ones. 
 
 
Configuring a port to trust packet priority for priority 
mapping 
When you configure the trusted packet priority type on an interface or port group, use the...

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Step Command Remarks 
2.  Enter interface view or 
port group view. 
• Enter interface view: 
interface  interface-type 
interface-number 
•  Enter port group view: 
port-group manual 
port-group-name   Use either command. 
Settings in interface view take effect on 
the current interface. Settings in port 
group view take effect on all ports in the 
port group.  
3.
  Set the port priority of 
the interface.   qos priority 
priority-value  The default port priority is 0.
 
 
Displaying priority...

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Configuration procedure 
# Assign port priority to GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2. Make sure that the priority 
of GigabitEthernet 1/0/1 is higher than that of GigabitEthernet 1/0/2, and no trusted packet priority 
type is configured on GigabitEthernet 1/0/1 or GigabitEthernet 1/0/2. 
 system-view 
[DeviceC] interface gigabitethernet 1/0/1 
[DeviceC-GigabitEthernet1/0/1] qos priority 3 
[DeviceC-GigabitEthernet1/0/1] quit 
[DeviceC] interface gigabitethernet 1/0/2...

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Figure 8 Network diagram 
 
 
Configuration procedure 
1. Configure trusting port priority: 
# Set the port priority of GigabitEthernet 1/0/1 to 3. 
 system-view 
[Device] interface gigabitethernet 1/0/1 
[Device-GigabitEthernet1/0/1] qos priority 3 
[Device-GigabitEthernet1/0/1] quit 
# Set the port priority of GigabitEthernet 1/0/2 to 4. 
[Device] interface gigabitethernet 1/0/2 
[Device-GigabitEthernet1/0/2] qos priority 4 
[Device-GigabitEthernet1/0/2] quit 
# Set the port priority of...

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[Device-maptbl-dot1p-lp] import 5 export 4 
[Device-maptbl-dot1p-lp] quit 
3. Configure priority marking: 
# Mark the HTTP traffic of the management  department, marketing department, and R&D 
department to the Internet with 802.1p priorities  4, 5, and 3, respectively. Use the priority 
mapping table you have configured to map the 802.1p priorities to local precedence values 6, 4, 
and 2, respectively, for differentiated traffic treatment.  
# Create ACL 3000 to match HTTP traffic.  
[Device] acl...

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Configuring traffic policing, traffic shaping, 
and line rate 
Both bridge mode (Layer 2) and route mode (Layer 3) Ethernet ports support the traffic shaping and line 
rate functions. The term  interface i n  t h i s  ch a p t e r  c o l l e c t ive ly  re fe rs  t o  t h e s e  t yp e s  o f  p o r t s.  Yo u  c a n  u s e  t h e  
port  link-mode  command to set an Ethernet port to  operate in bridge or route mode (see  Layer 2—LAN 
Switching Configuration Guide ). 
The 5500 SI Switch Series does...

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Complicated evaluation 
You can set two token buckets, bucket C and bucket E, to evaluate traffic in a more complicated 
environment and achieve more policing flexibility.  For example, traffic policing uses the following 
parameters: 
•   CIR—Rate at which tokens are put into bucket C.  It sets the average packet transmission or 
forwarding rate allowed by bucket C. 
•   CBS—Size of bucket C, which specifies the transient burst of traffic that bucket C can forward. 
•   Peak information rate (PIR)...

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Figure 9 Traffic policing 
 
 
Traffic policing is widely used in policing traffic entering the networks of internet service providers (ISPs). 
It can classify the policed traffic and take pre-defined policing actions on each packet depending on the 
evaluation result: 
•  Forwarding the packet if the evaluation result is conforming 
•   Dropping the packet if the evaluation result is excess 
•   Forwarding the packet with its precedence, which can be 802.1p priority (available only for green...