HP 5500 Ei 5500 Si Switch Series Configuration Guide

 68 
[DeviceA-GigabitEthernet1/0/1] qos apply policy policy inbound  

 69 
Configuring class-based accounting 
Class-based accounting collects statistics (in packets or bytes) on a per-traffic class basis. For example, 
you can define the action to collect statistics for traffic sourced from a certain IP address. By analyzing 
the statistics, you can determine whether anomalies have occurred and what action to take. The 5500 EI 
and 5500 SI Switch Series supports only collecting statistics in packets.  
Configuration procedure 
To configure class-based accounting:  
Step...

 70 
Class-based accounting configuration example 
Network requirements 
As shown in Figure 21, Ho st is connected to GigabitEthernet 1/0/1 of Device A. 
Configure class-based accounting to collect statistics for traffic sourced from 1.1.1.1/24 and received on 
GigabitEthernet 1/0/1. 
Figure 21  Network diagram 
 
 
Configuration procedure 
# Create basic ACL 2000, and configure a rule to match packets with source IP address 1.1.1.1. 
 system-view 
[DeviceA] acl number 2000 
[DeviceA-acl-basic-2000] rule...

 71 
     Operator: AND 
     Rule(s) : If-match acl 2000 
     Behavior: behavior_1 
      Accounting Enable: 
        28529 (Packets) 
  

 72 
Configuring the data buffer 
Overview 
Data buffer 
The Switch Series provides the data buffer to buffer packets to be sent out ports to avoid packet loss when 
bursty traffic causes congestion.  
The switch controls how a port uses the data buffer by allocating the cell resource and packet resource 
(called buffer resources).  
•   The cell resource is the physical storage space in  cells for the data buffer. The cell resource allocated 
to a port indicates the maximum buffer space that the port...

 73 
•  On a per-port basis —As illustrated by the vertical lines in  Figure 22, the s witch automatically 
divides the dedicated resource among all ports evenly.  
•   On a per-queue basis —As illustrated by the horizontal lines in  Figure 22, the dedi
 cated resource of 
each port is proportionately allocated among the qu eues on it and all ports use the same allocation 
scheme. The percentage of the resource allocated to a queue is called the minimum guaranteed 
resource percentage of the queue.  
The...

 74 
Using the burst function to configure the data buffer 
setup 
The burst function allows the switch to automatically determine the shared resource size, the minimum 
guaranteed resource size for each queue, the maximum shared resource size for each queue, and the 
maximum shared resource size per port.  
The burst function helps optimize packet buffering to ameliorate forwarding performance in the following 
scenarios: 
•   Broadcast or multicast traffic is dense and bursts of traffic are usually...

 75 
Step Command  Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Configure the shared 
resource area of the cell 
resource in percentage.  buffer egress
 [ slot slot-number  ] 
cell total-shared ratio  ratio  Optional. 
By default, the shared resource area 
of the cell resource is 60%. 
 
 
Configuring the minimum guarant eed resource size for a queue 
When configuring the minimum guaranteed resource size for a queue, follow these guidelines: 
•  Modifying the minimum guaranteed resource size...

 76 
Configuring the packet resource 
Configuring the minimum guaranteed resource size for a queue 
When configuring the minimum guaranteed resource size for a queue, follow these guidelines: 
•  Modifying the minimum guaranteed resource size for a queue can affect those of the other queues, 
because the dedicated resource of a port is shared by eight queues. The system will automatically 
allocate the remaining dedicated resource space am ong all queues that are not manually assigned 
a minimum...

 77 
Appendix A Default priority mapping tables 
Uncolored priority mapping tables 
For the default dscp-dscp mapping table, an input value yields a target value equal to it.  
Table 6  Default dot1p-lp and dot1p-dp priority mapping tables 
In
put priority value  dot1p-lp mapping dot1p-dp mapping 
802.1p priority (dot1p) Local precedence (lp) Drop precedence (dp) 
0 2 0 
1 0 0 
2 1 0 
3 3 0 
4 4 0 
5 5 0 
6 6 0 
7 7 0 
 
Table 7 Default dscp-dp and dscp-dot1p priority mapping tables 
In
put priority...