QoS | Get IP Address Accounting Information

here is I will share how capture near 'real-time' about packets accross interface ini Cisco router. by enabling IP accounting, you can see the number of bytes and packets switched through the Cisco IOS® software on a source and destination IP address basis. only transit IP traffic is measured and only on an outbound basis, traffic generated by the software or terminating in the software is not included in the accounting statistics. different feature on serial interface and ethernet you can see in below. this feature accounting information just work on physical interface not work in logical interface like subinterface or interface vlan except interface controller like 'serial1/0:4'.

#interface Serial

(config-if)#ip accounting ?
  access-violations  Account for IP packets violating access lists on this interface
  output-packets     Account for IP packets output on this interface
  precedence         Count packets by IP precedence on this interface
  

#interface FastEthernet

(config-if)#ip accounting ?
  access-violations  Account for IP packets violating access lists on this interface
  mac-address        Account for MAC addresses seen on this interface
  output-packets     Account for IP packets output on this interface
  precedence         Count packets by IP precedence on this interface
  

interface Serial1
 ip address x.x.x.x x.x.x.x
 ip accounting output-packets
 no fair-queue --> 'Queueing strategy: fifo'
end

sh ip accounting | [output-packets]
   Source           Destination              Packets               Bytes
 172.16.1.55        172.16.0.3                  6                   552
 172.16.1.55        172.16.0.3                  2                    96
 172.16.1.55        172.16.0.3                  4                   192

Accounting data age is xdxxh
Accounting threshold exceeded for 952906 packets and 888094275 bytes

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