Example for Collecting the Statistics on IPv4 Unicast Traffic Flows

This section provides an example for collecting statistics on the IPv4 unicast flow in the inbound direction of the interface.

Networking Requirements

As shown in Figure 1, an enterprise network is connected to FW_B on the carrier network through FW_A. NetStream is enabled on FW_B. In such a scenario, the carrier can collect the statistics on the inbound traffic flows passing GigabitEthernet 0/0/1 of FW_B. The collected statistics provides a reference for network accounting.

Figure 1 Networking diagram of collecting the statistics on unicast traffic

Item	Data
Destination IP address of the NetStream traffic	10.2.1.2
Destination port of the NetStream traffic	6000
Source IP address of the NetStream traffic	10.2.1.1
NetStream statistics output version	version 5

Configuration Roadmap

The configuration roadmap is as follows:

Set IP addresses for the interfaces on the FWs.
Enable NetStream for collecting statistics on inbound traffic flows on FW_B.

Procedure

Set IP addresses for the interfaces on FW_A and FW_B.

# Set IP addresses for FW_A.

<FW_A> system-view
[FW_A] interface GigabitEthernet 0/0/1
[FW_A-GigabitEthernet0/0/1] ip address 10.1.1.1 24
[FW_A-GigabitEthernet0/0/1] quit

# Set IP addresses for FW_B.

<FW_B> system-view
[FW_B] interface GigabitEthernet 0/0/1
[FW_B-GigabitEthernet0/0/1] ip address 10.1.1.2 24
[FW_B-GigabitEthernet0/0/1] quit

Enable the NetStream function for collecting inbound statistics on FW_B.
# Enable the NetStream function for collecting inbound statistics on FW_B.
```
[FW_B] interface GigabitEthernet 0/0/1
[FW_B-GigabitEthernet0/0/1] ip netstream inbound
```
# Configure the output version of the collected statistics on FW_B.
```
[FW_B] ip netstream export version 5
```
# Configure the FW_B to send the collected statistics to the NSCs and NDA.
```
[FW_B] ip netstream export host 10.2.1.2 6000
```
# Set the source address for the FW_B to send the collected statistics.
```
[FW_B] ip netstream export source 10.2.1.1
```

Result

After the configuration is complete, run the display ip netstream cache command in the user view to display the statistics on the cached NetStream traffic flows.

<FW_B> display ip netstream cache
IP netstream cache information                                                 
  Stream active timeout(minute)  : 30                                           
  Stream inactive timeout(second): 1                                            
  Stream entry been created      : 0                                            
  Last clearing of statistics    : never                                        
                                                                                
 IP packet number of different size                                             
 1-80        81-552      553-576     577-612     613-1480    1481-1500   1501-  
 0           0           0           0           0           0           0      
                                                                                
                                                                                
 Protocol           Total  Packets   Stream   Packets Active(sec)   Idle(sec)   
                  Streams     /Sec     /Sec   /stream     /stream     /stream   
 ----------------------------------------------------------------------------   
 Total                  0        0         0        0           0           0   
                                                                                
                                                                                
 DstIf            DstIP           SrcIP           Pro Tos Flgs Pkts             
 SrcIf            DstP  Msk AS    SrcP  Msk AS    NextHop                       
 BGP: BGP NextHop                                                               
 --------------------------------------------------------------------------

After the configuration is complete, run the display ip netstream export command in the user view to display the information about the output of NetStream traffic statistics.
```
<FW_B> display ip netstream export
Version 5 ip export information
  Exported stream number: 120
  Exported UDP datagram number: 120     failed number:0
```