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FAQ-What Are the Meanings of the Items in Firewall Interface Statistics

Publication Date:  2015-07-01 Views:  386 Downloads:  0
Issue Description
What Are the Meanings of the Items in Firewall Interface Statistics?
Run the display interface command to view packets statistics on the interface. For example:

GigabitEthernet0/0/0 current state : UP                                          
Line protocol current state : UP                                                 
GigabitEthernet0/0/0 current firewall zone : trust                               
Description : USG Series, GigabitEthernet0/0/0 Interface             
The Maximum Transmit Unit is 1500 bytes, Hold timer is 10(sec)                   
Internet Address is                                                   
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-fc44-0001  
Media type is twisted pair, loopback not set, promiscuous mode not set           
100Mb/s-speed mode, Full-duplex mode, link type is auto negotiation              
flow control is disable                                                          
Output queue : (Urgent queue : Size/Length/Discards)  0/50/0                     
Output queue : (Protocol queue : Size/Length/Discards) 0/1000/0                  
Output queue : (FIFO queuing : Size/Length/Discards)  0/75/0                     
    Last 5 minutes input rate 9  bytes/sec, 0  packets/sec                       
    Last 5 minutes output rate 0  bytes/sec, 0  packets/sec                      
    Input: 68489 packets, 6245989 bytes                                          
           49034 broadcasts, 10384 multicasts                                    
           0 errors, 0 runts, 0 giants, 0 FCS                                    
           0 length error, 0 code error, 0 align errors                          
    Output:252 packets,  16292 bytes                                             
           20 broadcasts, 0 multicasts                                           
           0 errors, 0 collisions, 0 late collisions                             
           0 ex. collisions, 0 FCS error                                         
           0 deferred, 0 runts, 0 giants     
The command output shows that the interface receives 68,489 packets, totally 6,245,989 bytes in the inbound direction. These packets include 49,034 broadcast packets and 10,384 multicast packets. The interface transmits 252 packets, totally 16,292 bytes, in the outbound direction. The description of other items is as follows:
  • Inbound direction:
− errors: total error packets in the inbound direction
− runts: ultrashort packets
− giant: oversized packets
− FCS: Ethernet packets with the FCS error
− length error: packets whose length field values vary with packet lengths
− code error: packets with code errors
− align errors: alignment errors. The length of packet is not an integer.
  • Outbound direction:
− errors: total error packets in the outbound direction
− collisions: collision errors during packet sending
− late collisions: post-collision errors before packets are completely sent
− ex. collisions: errors caused by continuous collision failure. A packet cannot be successfully sent after 16 collisions and thereby is discarded.
− FCS: Ethernet packets with the FCS error
− deferred: delayed sending. The delay for sending packets is available, excluding collision errors.
− runts: ultrashort packets
− giants: oversized packets