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High Input Packet Queue DropRate

Hi Experts,

I have Cisco 1841, Internet link terminated on Fa0/1 and MPLS routing done on this router.
Recently we are getting alerts like below High input packet queue drop.....

EVENT ID                = 00064KQ
ALERT ID                = 000018I
TIME                    = ti 23-feb-2010 12:27:28 CET
STATUS                  = Active
SEVERITY                = Critical
MANAGED OBJECT          = 10.30.1.1
MANAGED OBJECT TYPE     = Routers
EVENT DESCRIPTION       = HighQueueDropRate::Component=IF-10.30.1.1/2 [Fa0/1] [194.5.3.22];Type=ETHERNETCSMACD;OutputPacketNoErrorRate=80.18672  PPS;DuplexMode=FULLDUPLEX;InputPacketQueueDropRate=2.659751  PPS;InputPacketQueueDropPct=2.6009076  %;MaxSpeed=100000000;OutputPacketQueueDropPct=0.0  %;OutputPacketQueueDropRate=0.0  PPS;QueueDropThreshold=1;InputPacketNoErrorRate=99.60166  PPS;
CUSTOMER IDENTIFICATION = RG
CUSTOMER REVISION       = IGNOR

#sh int FastEthernet0/1
FastEthernet0/1 is up, line protocol is up
  Hardware is Gt96k FE, address is 0018.ba59.3d73 (bia 0018.ba59.3d73)
  Internet address is 194.175.230.228/29
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 3/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:01, output 00:00:00, output hang never
  Last clearing of "show interface" counters 01:54:26
  Input queue: 0/75/2473/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 1443000 bits/sec, 163 packets/sec
  5 minute output rate 103000 bits/sec, 116 packets/sec
     656378 packets input, 782081870 bytes
     Received 38 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     478787 packets output, 61976325 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out


When I checked the Interface status is looking fine no input errors, but there are input queue drops.
Experts can someone tell me what causes this and how to rectify this issue.


Regards,
Naidu.

8 REPLIES

Re: High Input Packet Queue DropRate

Hi Experts,

I have Cisco 1841, Internet link terminated on Fa0/1 and MPLS routing done on this router.
Recently we are getting alerts like below High input packet queue drop.....

EVENT ID                = 00064KQ
ALERT ID                = 000018I
TIME                    = ti 23-feb-2010 12:27:28 CET
STATUS                  = Active
SEVERITY                = Critical
MANAGED OBJECT          = 10.30.1.1
MANAGED OBJECT TYPE     = Routers
EVENT DESCRIPTION       = HighQueueDropRate::Component=IF-10.30.1.1/2 [Fa0/1] [194.5.3.22];Type=ETHERNETCSMACD;OutputPacketNoErrorRate=80.18672 PPS;DuplexMode=FULLDUPLEX;InputPacketQueueDropRate=2.659751 PPS;InputPacketQueueDropPct=2.6009076 %;MaxSpeed=100000000;OutputPacketQueueDropPct=0.0 %;OutputPacketQueueDropRate=0.0 PPS;QueueDropThreshold=1;InputPacketNoErrorRate=99.60166  PPS;
CUSTOMER IDENTIFICATION = RG
CUSTOMER REVISION       = IGNOR

#sh int FastEthernet0/1
FastEthernet0/1 is up, line protocol is up
  Hardware is Gt96k FE, address is 0018.ba59.3d73 (bia 0018.ba59.3d73)
  Internet address is 194.175.230.228/29
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 3/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:01, output 00:00:00, output hang never
  Last clearing of "show interface" counters 01:54:26
  Input queue: 0/75/2473/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 1443000 bits/sec, 163 packets/sec
  5 minute output rate 103000 bits/sec, 116 packets/sec
     656378 packets input, 782081870 bytes
     Received 38 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     478787 packets output, 61976325 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out


When I checked the Interface status is looking fine no input errors, but there are input queue drops.
Experts can someone tell me what causes this and how to rectify this issue.


Regards,
Naidu.

Hi Naidu,

Check out the below link for input queue drops and output queue drops in routers,Hope that Help !!

http://www.frameip.com/dos-cisco/queue_drops.pdf

Ganesh.H

Re: High Input Packet Queue DropRate

Hi Ganesh,

I gone through the doc and found some help full tips.

When I checked the below switching on interface Fa0/0, its saying at botum as a NOTE:all counts are cumulative and reset only after a reload.
Will it be cause as the router up time is 23 weeks? Will it be solved by reboot of the router?

#sh int FastEthernet0/0 switching
FastEthernet0/0
          Throttle count          0
                   Drops         RP        446         SP          0
             SPD Flushes       Fast          0        SSE          0
             SPD Aggress       Fast          0
            SPD Priority     Inputs   13547875      Drops          0

    Protocol  IP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process   36931469  284724562   28631306 2937412242
            Cache misses         27          -          -          -
                    Fast  314834807 2144222161  417738309  276669893
               Auton/SSE          0          0          0          0

    Protocol  DEC MOP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          0          0      23338    1797026
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    Protocol  ARP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process   12608234  757264480    1092143   65528580
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    Protocol  CDP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          0          0     233693   86700103
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    Protocol  Other
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process    4870187  448487734    1402134   84128040
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    NOTE: all counts are cumulative and reset only after a reload.

Regards,

Naidu.

Re: High Input Packet Queue DropRate

Post

show controllers | b FastEthernet0/0

sh ip traffic

Re: High Input Packet Queue DropRate

Hi Franscisco,

Please find the below required details.


# sh int FastEthernet0/1 switching
FastEthernet0/1
          Throttle count          0
                   Drops         RP      62988         SP          0
             SPD Flushes       Fast          0        SSE          0
             SPD Aggress       Fast          0
            SPD Priority     Inputs      65650      Drops          0

    Protocol  IP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process   17226771 1517877643   10031052  936695319
            Cache misses          0          -          -          -
                    Fast  353054280 1948098408  256692241 1479103364
               Auton/SSE          0          0          0          0

    Protocol  DEC MOP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          0          0      23351    1798027
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    Protocol  ARP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process      33424    2005440        997      59820
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    Protocol  CDP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          0          0     233827   86749817
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    Protocol  Other
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          0          0    1402939   84176340
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    NOTE: all counts are cumulative and reset only after a reload.


#sh controllers | begin FastEthernet0/0
Interface FastEthernet0/0
Hardware is GT96K FE ADDR: 633D8BC8, FASTSEND: 61BD8BF4, MCI_INDEX: 0
DIST ROUTE ENABLED: 0Route Cache Flag: 213
GPIO 2 CONF= 67FF07A8 GPIO 2 IO= 187D303F  CIU arbit = 80F002BF
PHY add register = 0xA4  PHY data register = 0xF05003B
Port Conf Reg= 0x80 ENABLE HT8K HMOD0
Port Conf Ex Reg= 0x10CD00
TX1:1 RXPRI=DE(00) ~FLCNTL ~FLNKP MFL64KB E RMII
Port Com Reg= 0x0
Port Status Reg= 0xB 100MB FDPX FCTL EN  LNK UP ~PAUSED TX oFF
Serial Param Reg= 0x218823  Hash table pointer= 0xE598960
Source ADDR L= 0x3D72 Source ADDR H= 0x18BA59
SDMA conf reg= 0x223C RETX 15 RX BE TX BE FRINT BSIZE 4
SDMA com reg= 0x1010080 SRT TXL STP TXH EN RX
IMASK= 0x90003DCD ICause= 0x0
Serial 0 mask 30FFFC3Serial 0 cause 0
IpDiffservP0L= 0x0 IpDiffservP0H= 0x0 IpDiffservP1L= 0x0 IpDiffservP1H= 0x0
IP VLAN TAG PRI= 0xF0CC  IP VLAN TAG PRI= 0xF0CC
First rxd Q0= 0xE5D8A10  Curr rxd Q0= 0xE5D8A10
First rxd Q1= 0xE5D8E40  Curr rxd Q1= 0xE5D8E40
First rxd Q2= 0xE5D92A0  Curr rxd Q2= 0xE5D92A0
First rxd Q3= 0xE5D9700  Curr rxd Q3= 0xE5D9700
First txd Q0= 0xE5DA130  First txd Q1= 0xE5DA3A0
gt96kfe_instance=0x633D9C88, registers=0x24084800
RxRing entries=64, tx ring entries=128
       RxR0=0x E5D89E0, RxR1=0x E5D8E40, RxR2=0x E5D92A0, RxR3=0x E5D9700
Malloc RxR0=0xEE5D89E0, RxR1=0xEE5D8E40, RxR2=0xEE5D92A0, RxR3=0xEE5D9700
SDOW RxR0=0x633DA234, RxR1=0x633DA368, RxR2=0x633DA49C, RxR3=0x633DA5D0
HEAD RxR0=0x3, RxR1=0x0, RxR2=0x0, RxR3=0x0
TAIL RxR0=0x0, RxR1=0x0, RxR2=0x0, RxR30x0

tx_limited=0(128)
TxR0=0x E5D9B60, TxR1=0x E5DA3A0
COUNT TxR0=0x0, TxR1=0x0
Head TxR0=0x5D, TxR1=0x0 Tail TxR0=0x5D, TxR1=0x0

PHY registers:
  Register 0x00:   1000  782D  0040  61E4  01E1  41E1  0005  2001
  Register 0x08:   0000  0000  0000  0000  0000  0000  0000  0000
  Register 0x10:   1000  0300  0000  0000  0200  00DF  0200  0000
  Register 0x18:   003B  851F  9F00  008A  082B  0000  80A0
Bytes_recvd 2719632906 Bytes_sent 1674154376 Frames_recvd 380905062 Frames_sent                                                              449629905
total_bytes_RX 2719632906 Total_frames_RX 380905062 Bcast_frames_recvd 28538293
Mcast_frames_RX 9645598 CRC_err 0 Ovr_sized_frames 0
Fragments 0 Jabber 0 collision 0
Late_collision 0 64B frame 279892724; 65_127B_frames 186005194
128_255B_frames 35465137 256_511B_frames 50900130 512_1023B_frames 35215665
1023_maxB_frames 243056117 Rx_error 0 Dropped_frames 0
Mcast_frames_tx 1660105 Bcast_frames_tx 2258 Sml_frame_recvd 0


Software MAC address filter(hash:length/addr/mask/hits):
  0x00:  0  ffff.ffff.ffff  0000.0000.0000         0
  0x58:  0  0100.5e00.0006  0000.0000.0000         0
  0x5B:  0  0100.5e00.0005  0000.0000.0000         0
  0xC0:  0  0100.0ccc.cccc  0000.0000.0000         0
  0xC8:  0  0018.ba59.3d72  0000.0000.0000         0

======= Driver Counters =======
Number of Transmitter Hang =  0
tx_more_col_err=  0 tx_one_col_err=  0
tx_exc_collision_err=  0 tx_late_collision_err=  0
tx_underrun_err=  0 tx_error_intr=  0
rx_soft_overflow_err=  8  rx_overflow_err= 0

Interface FastEthernet0/1
Hardware is GT96K FE ADDR: 633E5E90, FASTSEND: 61BD8BF4, MCI_INDEX: 0
DIST ROUTE ENABLED: 0Route Cache Flag: 213
GPIO 2 CONF= 67FF07A8 GPIO 2 IO= 187D303F  CIU arbit = 80F002BF
PHY add register = 0xA4  PHY data register = 0xFC480A0
Port Conf Reg= 0x80 ENABLE HT8K HMOD0
Port Conf Ex Reg= 0x10CD00
TX1:1 RXPRI=DE(00) ~FLCNTL ~FLNKP MFL64KB E RMII
Port Com Reg= 0x0
Port Status Reg= 0xB 100MB FDPX FCTL EN  LNK UP ~PAUSED TX oFF
Serial Param Reg= 0x218823  Hash table pointer= 0xE6AAC20
Source ADDR L= 0x3D73 Source ADDR H= 0x18BA59
SDMA conf reg= 0x223C RETX 15 RX BE TX BE FRINT BSIZE 4
SDMA com reg= 0x1010080 SRT TXL STP TXH EN RX
IMASK= 0x90003DCD ICause= 0x0
Serial 0 mask 30FFFC3Serial 0 cause 0
IpDiffservP0L= 0x0 IpDiffservP0H= 0x0 IpDiffservP1L= 0x0 IpDiffservP1H= 0x0
IP VLAN TAG PRI= 0xF0CC  IP VLAN TAG PRI= 0xF0CC
First rxd Q0= 0xE6EB040  Curr rxd Q0= 0xE6EB040
First rxd Q1= 0xE6EB100  Curr rxd Q1= 0xE6EB100
First rxd Q2= 0xE6EB560  Curr rxd Q2= 0xE6EB560
First rxd Q3= 0xE6EB9C0  Curr rxd Q3= 0xE6EB9C0
First txd Q0= 0xE6EBF90  First txd Q1= 0xE6EC660
gt96kfe_instance=0x633E6F50, registers=0x24088800
RxRing entries=64, tx ring entries=128
       RxR0=0x E6EACA0, RxR1=0x E6EB100, RxR2=0x E6EB560, RxR3=0x E6EB9C0
Malloc RxR0=0xEE6EACA0, RxR1=0xEE6EB100, RxR2=0xEE6EB560, RxR3=0xEE6EB9C0
SDOW RxR0=0x633E7464, RxR1=0x633E7598, RxR2=0x633E76CC, RxR3=0x633E7800
HEAD RxR0=0x3A, RxR1=0x0, RxR2=0x0, RxR3=0x0
TAIL RxR0=0x0, RxR1=0x0, RxR2=0x0, RxR30x0

tx_limited=0(128)
TxR0=0x E6EBE20, TxR1=0x E6EC660
COUNT TxR0=0x0, TxR1=0x0
Head TxR0=0x17, TxR1=0x0 Tail TxR0=0x17, TxR1=0x0

PHY registers:
  Register 0x00:   1000  782D  0040  61E4  01E1  41E1  0005  2001
  Register 0x08:   0000  0000  0000  0000  0000  0000  0000  0000
  Register 0x10:   1000  0300  0000  0000  0200  0100  0200  0000
  Register 0x18:   003B  851F  9F00  008A  082B  0000  80A0
Bytes_recvd 940689723 Bytes_sent 543166746 Frames_recvd 374804674 Frames_sent 26                                                             8379401
total_bytes_RX 940689723 Total_frames_RX 374804674 Bcast_frames_recvd 32434
Mcast_frames_RX 3032253 CRC_err 0 Ovr_sized_frames 0
Fragments 0 Jabber 0 collision 0
Late_collision 0 64B frame 236388456; 65_127B_frames 57813198
128_255B_frames 36290630 256_511B_frames 43967723 512_1023B_frames 32802738
1023_maxB_frames 235921330 Rx_error 0 Dropped_frames 0
Mcast_frames_tx 257176 Bcast_frames_tx 99 Sml_frame_recvd 0


Software MAC address filter(hash:length/addr/mask/hits):
  0x00:  0  ffff.ffff.ffff  0000.0000.0000         0
  0xC0:  0  0100.0ccc.cccc  0000.0000.0000         0
  0xC9:  0  0018.ba59.3d73  0000.0000.0000         0

======= Driver Counters =======
Number of Transmitter Hang =  0
tx_more_col_err=  0 tx_one_col_err=  0
tx_exc_collision_err=  0 tx_late_collision_err=  0
tx_underrun_err=  0 tx_error_intr=  0
rx_soft_overflow_err=  0  rx_overflow_err= 0


#sh controllers | begin FastEthernet0/1
Interface FastEthernet0/1
Hardware is GT96K FE ADDR: 633E5E90, FASTSEND: 61BD8BF4, MCI_INDEX: 0
DIST ROUTE ENABLED: 0Route Cache Flag: 213
GPIO 2 CONF= 67FF07A8 GPIO 2 IO= 187D303F  CIU arbit = 80F002BF
PHY add register = 0xA4  PHY data register = 0xFC480A0
Port Conf Reg= 0x80 ENABLE HT8K HMOD0
Port Conf Ex Reg= 0x10CD00
TX1:1 RXPRI=DE(00) ~FLCNTL ~FLNKP MFL64KB E RMII
Port Com Reg= 0x0
Port Status Reg= 0xB 100MB FDPX FCTL EN  LNK UP ~PAUSED TX oFF
Serial Param Reg= 0x218823  Hash table pointer= 0xE6AAC20
Source ADDR L= 0x3D73 Source ADDR H= 0x18BA59
SDMA conf reg= 0x223C RETX 15 RX BE TX BE FRINT BSIZE 4
SDMA com reg= 0x1010080 SRT TXL STP TXH EN RX
IMASK= 0x90003DCD ICause= 0x20000000 SMI
Serial 0 mask 30FFFC3Serial 0 cause 0
IpDiffservP0L= 0x0 IpDiffservP0H= 0x0 IpDiffservP1L= 0x0 IpDiffservP1H= 0x0
IP VLAN TAG PRI= 0xF0CC  IP VLAN TAG PRI= 0xF0CC
First rxd Q0= 0xE6EAEA0  Curr rxd Q0= 0xE6EAEA0
First rxd Q1= 0xE6EB100  Curr rxd Q1= 0xE6EB100
First rxd Q2= 0xE6EB560  Curr rxd Q2= 0xE6EB560
First rxd Q3= 0xE6EB9C0  Curr rxd Q3= 0xE6EB9C0
First txd Q0= 0xE6EC070  First txd Q1= 0xE6EC660
gt96kfe_instance=0x633E6F50, registers=0x24088800
RxRing entries=64, tx ring entries=128
       RxR0=0x E6EACA0, RxR1=0x E6EB100, RxR2=0x E6EB560, RxR3=0x E6EB9C0
Malloc RxR0=0xEE6EACA0, RxR1=0xEE6EB100, RxR2=0xEE6EB560, RxR3=0xEE6EB9C0
SDOW RxR0=0x633E7464, RxR1=0x633E7598, RxR2=0x633E76CC, RxR3=0x633E7800
HEAD RxR0=0x20, RxR1=0x0, RxR2=0x0, RxR3=0x0
TAIL RxR0=0x0, RxR1=0x0, RxR2=0x0, RxR30x0

tx_limited=0(128)
TxR0=0x E6EBE20, TxR1=0x E6EC660
COUNT TxR0=0x0, TxR1=0x0
Head TxR0=0x21, TxR1=0x0 Tail TxR0=0x21, TxR1=0x0

PHY registers:
  Register 0x00:   1000  782D  0040  61E4  01E1  41E1  0005  2001
  Register 0x08:   0000  0000  0000  0000  0000  0000  0000  0000
  Register 0x10:   1000  0300  0000  0000  0200  0087  0300  0000
  Register 0x18:   003B  851F  9F00  008A  082B  0000  80A0
Bytes_recvd 943107620 Bytes_sent 543372061 Frames_recvd 374806679 Frames_sent 268380898
total_bytes_RX 943107620 Total_frames_RX 374806679 Bcast_frames_recvd 32434
Mcast_frames_RX 3032264 CRC_err 0 Ovr_sized_frames 0
Fragments 0 Jabber 0 collision 0
Late_collision 0 64B frame 236389781; 65_127B_frames 57813449
128_255B_frames 36290801 256_511B_frames 43967781 512_1023B_frames 32802874
1023_maxB_frames 235922891 Rx_error 0 Dropped_frames 0
Mcast_frames_tx 257177 Bcast_frames_tx 99 Sml_frame_recvd 0


Software MAC address filter(hash:length/addr/mask/hits):
  0x00:  0  ffff.ffff.ffff  0000.0000.0000         0
  0xC0:  0  0100.0ccc.cccc  0000.0000.0000         0
  0xC9:  0  0018.ba59.3d73  0000.0000.0000         0

======= Driver Counters =======
Number of Transmitter Hang =  0
tx_more_col_err=  0 tx_one_col_err=  0
tx_exc_collision_err=  0 tx_late_collision_err=  0
tx_underrun_err=  0 tx_error_intr=  0
rx_soft_overflow_err=  0  rx_overflow_err= 0


#sh ip traffic
IP statistics:
  Rcvd:  1410759964 total, 35018742 local destination
         0 format errors, 52 checksum errors, 1775 bad hop count
         21 unknown protocol, 0 not a gateway
         0 security failures, 0 bad options, 46 with options
  Opts:  4 end, 0 nop, 0 basic security, 0 loose source route
         0 timestamp, 0 extended security, 4 record route
         0 stream ID, 0 strict source route, 42 alert, 0 cipso, 0 ump
         0 other
  Frags: 17171 reassembled, 685 timeouts, 0 couldn't reassemble
         2231 fragmented, 4462 fragments, 326 couldn't fragment
  Bcast: 10937979 received, 360 sent
  Mcast: 3086610 received, 2972854 sent
  Sent:  16720832 generated, 701604210 forwarded
  Drop:  3527 encapsulation failed, 0 unresolved, 0 no adjacency
         28 no route, 0 unicast RPF, 0 forced drop
         0 options denied
  Drop:  0 packets with source IP address zero
  Drop:  0 packets with internal loop back IP address
         155535 physical broadcast

ICMP statistics:
  Rcvd: 0 format errors, 144 checksum errors, 0 redirects, 3801 unreachable
        1585459 echo, 2921 echo reply, 10 mask requests, 0 mask replies, 0 quench
        0 parameter, 5 timestamp, 6 info request, 0 other
        0 irdp solicitations, 0 irdp advertisements
  Sent: 6071556 redirects, 160781 unreachable, 3042 echo, 1585459 echo reply
        0 mask requests, 0 mask replies, 0 quench, 5 timestamp
        0 info reply, 1348 time exceeded, 0 parameter problem
        0 irdp solicitations, 0 irdp advertisements

BGP statistics:
  Rcvd: 236875 total, 1 opens, 0 notifications, 3043 updates
        233831 keepalives, 0 route-refresh, 0 unrecognized
  Sent: 236795 total, 1 opens, 0 notifications, 2966 updates
        233828 keepalives, 0 route-refresh

TCP statistics:
  Rcvd: 1379223 total, 24 checksum errors, 15889 no port
  Sent: 1423051 total

IP-EIGRP statistics:
  Rcvd: 0 total
  Sent: 0 total

PIMv2 statistics: Sent/Received
  Total: 0/0, 0 checksum errors, 0 format errors
  Registers: 0/0 (0 non-rp, 0 non-sm-group), Register Stops: 0/0,  Hellos: 0/0
  Join/Prunes: 0/0, Asserts: 0/0, grafts: 0/0
  Bootstraps: 0/0, Candidate_RP_Advertisements: 0/0
  Queue drops: 0
  State-Refresh: 0/0

IGMP statistics: Sent/Received
  Total: 0/0, Format errors: 0/0, Checksum errors: 0/0
  Host Queries: 0/0, Host Reports: 0/0, Host Leaves: 0/0
  DVMRP: 0/0, PIM: 0/0
  Queue drops: 0

UDP statistics:
  Rcvd: 20872052 total, 5 checksum errors, 10940169 no port
  Sent: 4116457 total, 0 forwarded broadcasts

OSPF statistics:
  Rcvd: 4776297 total, 0 checksum errors
        2805649 hello, 1631434 database desc, 100 link state req
        338864 link state updates, 250 link state acks

  Sent: 3359185 total
        3190699 hello, 812 database desc, 101 link state req
        16628 link state updates, 150946 link state acks

ARP statistics:
  Rcvd: 12608194 requests, 37875 replies, 0 reverse, 0 other
  Sent: 51028 requests, 1042919 replies (6052 proxy), 0 reverse

Re: High Input Packet Queue DropRate

According to your outout below, your are getting few chewcksum errors, 21 unknow protocol, and as for BGP, also seeing checksum errors. If a header checksum is found to be mismatched, then the packet is discarded. Maybe that's why you are seeing losts of packet drops in your in-put queue!

Input queue: 0/75/2473/0 (size/max/drops/flushes); Total output drops: 0


#sh ip traffic
IP statistics:
  Rcvd:  1410759964 total, 35018742 local destination
         0 format errors, 52 checksum errors, 1775 bad hop count
         21 unknown protocol, 0 not a gateway
   

BGP statistics:
  Rcvd: 236875 total, 1 opens, 0 notifications, 3043 updates
        233831 keepalives, 0 route-refresh, 0 unrecognized
  Sent: 236795 total, 1 opens, 0 notifications, 2966 updates
        233828 keepalives, 0 route-refresh

TCP statistics:
  Rcvd: 1379223 total, 24 checksum errors, 15889 no port
  Sent: 1423051 total

Re: High Input Packet Queue DropRate

Are you experiencing any issues with connectivity?

Re: High Input Packet Queue DropRate

Hi,

No issues with connectivity.

Regards,

Naidu.

New Member

Re: High Input Packet Queue DropRate

We were facing similar problem earlier but following solution fixed the problem.

Please check your default route, '

The default route should not be given as connected connected interface.

Example

Let say your Router has two Ethernet ports configured as

WAN interface is f0/0  IP 202.56.100.72 ( next hop ip / gateway IP is 202.56.100.73)

LAN interface is f0/1

incorrect route example that generate excessive ARP and requires frequent router reboots  e.g.

ip route 0.0.0.0  0.0.0.0  f0/0

best practice is to give IP address of next-hop  e.g

ip route 0.0.0.0  0.0.0.0  202.56.100.73<-(next hop IP0

If problem persists

try adjusting packet segmentation size by adding following command on your LAN interface

LAN Inferface

interface FastEthernet0/1 ,

ip address 192.168.1.254 255.255.255.0

ip nat inside

ip tcp adjust-mss 1436


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