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tx drops catalyst 2960

art.bokhan
Beginner
Beginner

Hello.

I have strange tx drops on gi ports of cat 2960. All ports have small transfer rates. Errors look strange and inexplicable. What is the possible reason?

Switch Ports Model              SW Version            SW Image                

------ ----- -----              ----------            ----------              

*    1 50    WS-C2960S-48TS-S   12.2(58)SE            C2960S-UNIVERSALK9-M    

sh int gi0/1 controller         

GigabitEthernet0/1 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet, address is dc7b.94b7.9c01 (bia dc7b.94b7.9c01)

  Description: trunk

  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

     reliability 255/255, txload 4/255, rxload 6/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX

  input flow-control is off, output flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:16, output 00:00:00, output hang never

  Last clearing of "show interface" counters 06:52:13

  Input queue: 0/4096/0/0 (size/max/drops/flushes); Total output drops: 2828

  Queueing strategy: fifo

  Output queue: 0/4096 (size/max)

  5 minute input rate 24862000 bits/sec, 8752 packets/sec

  5 minute output rate 18520000 bits/sec, 4672 packets/sec

     246908278 packets input, 65467325427 bytes, 0 no buffer

     Received 213948 broadcasts (117704 multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 117704 multicast, 0 pause input

     0 input packets with dribble condition detected

     142702266 packets output, 84278358054 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     820 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 pause output

     0 output buffer failures, 0 output buffers swapped out

     Transmit GigabitEthernet0/1              Receive

   1498118500 Bytes                       2527123071 Bytes                   

    715192093 Unicast frames              1231007062 Unicast frames          

       926287 Multicast frames               1073674 Multicast frames        

         4262 Broadcast frames                904655 Broadcast frames        

            0 Too old frames              2313965628 Unicast bytes           

            0 Deferred frames               79012047 Multicast bytes         

            0 MTU exceeded frames           82825789 Broadcast bytes         

            0 1 collision frames                   0 Alignment errors        

            0 2 collision frames                   0 FCS errors              

            0 3 collision frames                   0 Oversize frames         

            0 4 collision frames                   0 Undersize frames        

            0 5 collision frames                   0 Collision fragments     

            0 6 collision frames      

            0 7 collision frames             1075799 Minimum size frames     

            0 8 collision frames           646043936 65 to 127 byte frames   

            0 9 collision frames           310520183 128 to 255 byte frames  

            0 10 collision frames           71221231 256 to 511 byte frames  

            0 11 collision frames           53776772 512 to 1023 byte frames 

            0 12 collision frames          150328405 1024 to 1518 byte frames

            0 13 collision frames                  0 Overrun frames          

            0 14 collision frames                  0 Pause frames            

            0 15 collision frames     

            0 Excessive collisions                 0 Symbol error frames     

            0 Late collisions                      0 Invalid frames, too large

            0 VLAN discard frames              19065 Valid frames, too large 

            0 Excess defer frames                  0 Invalid frames, too small

      1048624 64 byte frames                       0 Valid frames, too small 

    369803960 127 byte frames         

    121338068 255 byte frames                      0 Too old frames          

     51240107 511 byte frames                      0 Valid oversize frames   

     27503328 1023 byte frames                     0 System FCS error frames 

    145173196 1518 byte frames                     0 RxPortFifoFull drop frame

        15359 Too large frames        

            0 Good (1 coll) frames    

            0 Good (>1 coll) frames   

2 Replies 2

harsingh2
Beginner
Beginner

It seems like this interface is receiving lot of Broadcast traffic. Minimize periodic broadcast traffic like routing and Service Advertising Protocol (SAP) updates (if applicable) by using access lists or by other means.

Can you provide output of sh run int g0/1. Try turning off IP fast switching by using no ip route-cache interface configuartion command.

HTH,

Harpreet

Leo Laohoo
VIP Community Legend VIP Community Legend
VIP Community Legend

Sounds like the client-side can't process 1Gb traffic.

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