3845-MB dropping pings to its own serial interface.

[OSIManiac]

Good day friends!

I'm having an issue that I can't quite understand. I set up a test lab to get familiar with EIGRP routing. I have a Cisco 3845-MB with 2

VWIC2-2MFT-T1/E1 cards.

sh ip int brief shows UP UP status on all serial ports. I gave it an IP address but I'm having trouble pinging the serial interface IP. It's dropping pings to its own S 1/1/0 interface when pinging from console. I have known good T1 crossover cables 1&2 - 4&5.

Here is the "ip int brief" from 3845-MB

3845-MB#sh ip int brief

Interface                  IP-Address      OK? Method Status                Prot

ocol

GigabitEthernet0/0         unassigned      YES NVRAM  administratively down down

GigabitEthernet0/1         172.30.2.1      YES NVRAM  up                    up

Serial1/1/0:0              10.3.29.2       YES manual up                    up

Right now it's pinging itself at about 60 -90% success rate... and I can't figure out why it's dropping any packets at all. I have other issues with in the lab as well... but i think this might be my "core" issue.

To make matters even more "weird" I've tried two different VWIC2-2MFT-T1/E1 cards and I drop pings with both of them. :-/

Thanks in advance to all who take the time to help!

Here is a sh run and a sh diag:

3845-MB#sh run

Building configuration...

Current configuration : 1434 bytes

!

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname 3845-MB

!

boot-start-marker

boot-end-marker

!

! card type command needed for slot/vwic-slot 0/1

! card type command needed for slot/vwic-slot 0/2

! card type command needed for slot/vwic-slot 1/0

logging console critical

!

no aaa new-model

!

resource policy

!

no network-clock-participate slot 1

ip subnet-zero

ip cef

!

!

!

!

!

voice-card 0

no dspfarm

!

!

!

!

!

!

!

!

!

!

!

!

!

!

!

!

!

controller T1 0/2/0

framing esf

clock source line independent

linecode b8zs

!

controller T1 0/2/1

framing esf

clock source line independent

linecode b8zs

!

controller T1 1/1/0

framing esf

linecode b8zs

channel-group 0 timeslots 1-24

description T1 to LASVEGAS

!

!

!

!

!

interface GigabitEthernet0/0

no ip address

shutdown

duplex auto

speed auto

media-type rj45

negotiation auto

!

interface GigabitEthernet0/1

ip address 172.30.2.1 255.255.255.0

duplex auto

speed auto

media-type rj45

negotiation auto

!

interface Serial1/1/0:0

ip address 10.3.29.2 255.255.255.0

!

ip classless

!

!

ip http server

no ip http secure-server

!

!

!

!

!

control-plane

!

!

!

voice-port 0/0/0

!

voice-port 0/0/1

!

voice-port 0/0/2

!

voice-port 0/0/3

!

!

!

!

!

!

!

!

line con 0

stopbits 1

line aux 0

stopbits 1

line vty 0 4

exec-timeout 3000 0

privilege level 15

no login

!

scheduler allocate 20000 1000

!

end

sh diag

3845 Backplane EEPROM:

        Hardware Revision        : 1.0

        Top Assy. Part Number    : 800-23093-01

        Board Revision           : B0

        Deviation Number         : 0

        Fab Version              : 04

        PCB Serial Number        : FOC10510M1S

        RMA Test History         : 00

        RMA Number               : 0-0-0-0

        RMA History              : 00

        Part Number              : 73-8639-04

        CLEI Code                : IPME110BRA

        Chassis Serial Number    : FTX1102A3S9

        Product (FRU) Number     : CISCO3845

        Version Identifier       : V01

        Hardware date code       : 20061219

        EEPROM format version 4

        EEPROM contents (hex):

          0x00: 04 FF 40 04 2B 41 01 00 C0 46 03 20 00 5A 35 01

          0x10: 42 42 30 88 00 00 00 00 02 04 C1 8B 46 4F 43 31

          0x20: 30 35 31 30 4D 31 53 03 00 81 00 00 00 00 04 00

          0x30: 82 49 21 BF 04 C6 8A 49 50 4D 45 31 31 30 42 52

          0x40: 41 C2 8B 46 54 58 31 31 30 32 41 33 53 39 CB 92

          0x50: 43 49 53 43 4F 33 38 34 35 20 20 20 20 20 20 20

          0x60: 20 20 89 56 30 31 20 83 01 32 1C 23 FF FF FF FF

          0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

       Backplane Registers

       -------------------

   Backplane Revision:              00BE

   Power Supply Status:             F50F

   -48V PS and Env Status:          FFFF

   -48V Isolation Control:          0007

   Backplane Cookie:                000C

   ENM/Backplane FPGA Revision:     00BE

   ENM/Backplane FPGA Int0 Status:  FFFF

   ENM/Backplane FPGA Int2 Status:  00FF

   ENM/Backplane FPGA Int4 Status : EF00

   ENM Interrupt Mask:              0001

   ENM/BP FPGA Interrupt 4 Mask:    0040

   ENM1 Test Port:                  00C3

   ENM2 Test Port:                  00C3

   ENM3 Test Port:                  00C3

   ENM3 Test Port:                  00C3

   ENM LED Control:                 0011

   ENM OIR Control:                 0000

   ENM OIR Status:                  9299

   ENM PCI Speed Status             000E

   Backplane FPGA Diag Int Control: FFFF

   ENM1 OIR State Machine Status:   C441

   ENM2 OIR State Machine Status:   4141

   ENM3 OIR State Machine Status:   0000

   ENM4 OIR State Machine Status:   0000

   Backplane Voltage Margin:        0000

Slot 0:

        C3845 Mother board 1GE(TX,SFP),1GE(TX), integrated VPN and 4W Port adapt

er, 13 ports

        Port adapter is analyzed

        Port adapter insertion time unknown

        Onboard VPN             : FW ver01100200

        EEPROM contents at hardware discovery:

        PCB Serial Number        : FOC10520T0F

        Hardware Revision        : 1.3

        Top Assy. Part Number    : 800-23616-05

        Board Revision           : A0

        Deviation Number         : 86930

        Fab Version              : 05

        RMA Test History         : 00

        RMA Number               : 0-0-0-0

        RMA History              : 00

        Processor type           : 69

        CLEI Code                : IPME110BRA

        Product (FRU) Number     : CISCO3845-MB

        Version Identifier       : V05

        Chassis MAC Address      : 001a.a206.2a20

        MAC Address block size   : 48

        Part Number              : 73-8799-08

        Hardware date code       : 20061226

        Chassis Serial Number    : FTX1102A3S9

        EEPROM format version 4

        EEPROM contents (hex):

          0x00: 04 FF C1 8B 46 4F 43 31 30 35 32 30 54 30 46 40

          0x10: 04 2C 41 01 03 C0 46 03 20 00 5C 40 05 42 41 30

          0x20: 88 00 01 53 92 02 05 03 00 81 00 00 00 00 04 00

          0x30: 09 69 C6 8A 49 50 4D 45 31 31 30 42 52 41 CB 8C

          0x40: 43 49 53 43 4F 33 38 34 35 2D 4D 42 89 56 30 35

          0x50: 20 D9 02 40 C1 C3 06 00 1A A2 06 2A 20 43 00 30

          0x60: 82 49 22 5F 08 83 01 32 1C 2A C2 8B 46 54 58 31

          0x70: 31 30 32 41 33 53 39 FF FF FF FF FF FF FF FF FF

        PVDM Slot 0:

        64-channel (G.711) Voice/Fax PVDMII DSP SIMM PVDM daughter card

        Hardware Revision        : 4.0

        Part Number              : 73-8541-05

        Board Revision           : A0

        Deviation Number         : 0

        Fab Version              : 04

        PCB Serial Number        : FOC10523637

        RMA Test History         : 00

        RMA Number               : 0-0-0-0

        RMA History              : 00

        Processor type           : 00

        Product (FRU) Number     : PVDM2-64

        Version Identifier       : V01

        EEPROM format version 4

        EEPROM contents (hex):

          0x00: 04 FF 40 03 EC 41 04 00 82 49 21 5D 05 42 41 30

          0x10: 88 00 00 00 00 02 04 C1 8B 46 4F 43 31 30 35 32

          0x20: 33 36 33 37 03 00 81 00 00 00 00 04 00 09 00 CB

          0x30: 88 50 56 44 4D 32 2D 36 34 89 56 30 31 20 D9 02

          0x40: 40 C1 FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

        WIC Slot 0:

        2nd generation - FXO Voice daughter card (4 port)

        Hardware Revision        : 5.0

        Top Assy. Part Number    : 800-21589-02

        Board Revision           : A0

        Deviation Number         : 0-0

        Fab Version              : 04

        PCB Serial Number        : FOC10501BSD

        RMA Test History         : 00

        RMA Number               : 0-0-0-0

        RMA History              : 00

        Product (FRU) Number     : VIC2-4FXO

        Version Identifier       : V01

        CLEI Code                : CNUIAPRAAA

        EEPROM format version 4

        EEPROM contents (hex):

          0x00: 04 FF 40 00 4C 41 05 00 C0 46 03 20 00 54 55 02

          0x10: 42 41 30 80 00 00 00 00 02 04 C1 8B 46 4F 43 31

          0x20: 30 35 30 31 42 53 44 03 00 81 00 00 00 00 04 00

          0x30: CB 89 56 49 43 32 2D 34 46 58 4F 89 56 30 31 20

          0x40: C6 8A 43 4E 55 49 41 50 52 41 41 41 FF FF FF FF

          0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

        WIC Slot 1:

        VWIC2-2MFT-T1/E1 - 2-Port RJ-48 Multiflex Trunk - T1/E1

        Hardware Revision        : 0.0

        Top Assy. Part Number    : 800-22629-05

        Board Revision           : A0

        Deviation Number         : 0

        Fab Version              : 04

        PCB Serial Number        : FOC10520RLN

        RMA Test History         : 00

        RMA Number               : 0-0-0-0

        RMA History              : 00

        Product (FRU) Number     : VWIC2-2MFT-T1/E1

        Version Identifier       : V01

        EEPROM format version 4

        EEPROM contents (hex):

          0x00: 04 FF 40 03 FC 41 00 00 C0 46 03 20 00 58 65 05

          0x10: 42 41 30 88 00 00 00 00 02 04 C1 8B 46 4F 43 31

          0x20: 30 35 32 30 52 4C 4E 03 00 81 00 00 00 00 04 00

          0x30: CB 90 56 57 49 43 32 2D 32 4D 46 54 2D 54 31 2F

          0x40: 45 31 89 56 30 31 20 D9 02 40 C1 FF FF FF FF FF

          0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

        WIC Slot 2:

        VWIC2-2MFT-T1/E1 - 2-Port RJ-48 Multiflex Trunk - T1/E1

        Hardware Revision        : 0.0

        Top Assy. Part Number    : 800-22629-05

        Board Revision           : A0

        Deviation Number         : 0

        Fab Version              : 04

        PCB Serial Number        : FOC10520RNV

        RMA Test History         : 00

        RMA Number               : 0-0-0-0

        RMA History              : 00

        Product (FRU) Number     : VWIC2-2MFT-T1/E1

        Version Identifier       : V01

        EEPROM format version 4

        EEPROM contents (hex):

          0x00: 04 FF 40 03 FC 41 00 00 C0 46 03 20 00 58 65 05

          0x10: 42 41 30 88 00 00 00 00 02 04 C1 8B 46 4F 43 31

          0x20: 30 35 32 30 52 4E 56 03 00 81 00 00 00 00 04 00

          0x30: CB 90 56 57 49 43 32 2D 32 4D 46 54 2D 54 31 2F

          0x40: 45 31 89 56 30 31 20 D9 02 40 C1 FF FF FF FF FF

          0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

Slot 1:

        NM-2W Port adapter

        Port adapter is analyzed

        Port adapter insertion time unknown

        EEPROM contents at hardware discovery:

        Hardware Revision        : 1.0

        Top Assy. Part Number    : 800-04799-02

        Board Revision           : A0

        Deviation Number         : 0-0

        Fab Version              : 05

        PCB Serial Number        : FOC104860NV

        RMA Test History         : 00

        RMA Number               : 0-0-0-0

        RMA History              : 00

        Product (FRU) Number     : NM-2W

        Version Identifier       : V01

        EEPROM format version 4

        EEPROM contents (hex):

          0x00: 04 FF 40 00 D6 41 01 00 C0 46 03 20 00 12 BF 02

          0x10: 42 41 30 80 00 00 00 00 02 05 C1 8B 46 4F 43 31

          0x20: 30 34 38 36 30 4E 56 03 00 81 00 00 00 00 04 00

          0x30: CB 85 4E 4D 2D 32 57 89 56 30 31 20 FF FF FF FF

          0x40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

        WIC Slot 0:

        VWIC2-2MFT-T1/E1 - 2-Port RJ-48 Multiflex Trunk - T1/E1

        Hardware Revision        : 0.0

        Top Assy. Part Number    : 800-22629-05

        Board Revision           : A0

        Deviation Number         : 0

        Fab Version              : 04

        PCB Serial Number        : FOC10520RGT

        RMA Test History         : 00

        RMA Number               : 0-0-0-0

        RMA History              : 00

        Product (FRU) Number     : VWIC2-2MFT-T1/E1

        Version Identifier       : V01

        EEPROM format version 4

        EEPROM contents (hex):

          0x00: 04 FF 40 03 FC 41 00 00 C0 46 03 20 00 58 65 05

          0x10: 42 41 30 88 00 00 00 00 02 04 C1 8B 46 4F 43 31

          0x20: 30 35 32 30 52 47 54 03 00 81 00 00 00 00 04 00

          0x30: CB 90 56 57 49 43 32 2D 32 4D 46 54 2D 54 31 2F

          0x40: 45 31 89 56 30 31 20 D9 02 40 C1 FF FF FF FF FF

          0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

          0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

        WIC Slot 1:

        T1 (1 port) Multi-Flex Trunk WAN daughter card

        Hardware revision 1.0           Board revision B0

        Serial number     35483656      Part number    800-03568-04

        FRU Part Number   VWIC-1MFT-T1=

        Test history      0x0           RMA number     00-00-00

        Connector type    PCI

        EEPROM format version 1

        EEPROM contents (hex):

          0x20: 01 20 01 00 02 1D 70 08 50 0D F0 04 00 00 00 00

          0x30: 58 00 00 00 06 12 22 00 FF FF FF FF FF FF FF FF

[Subeh Sharma]

Hi,

Please provide the following information

- Are you pinging 10.29.3.2 from this router or you're pinging something else?

- paste the output of the following before and after ping:

     - show interface serial 1/1/0:0

     - show controller t1 1/1/0:0

- Try pinging the other side of the link? what's the result?

Regards,

Subeh

[OSIManiac]

Good day Subeh-

I'm consoled into the 3845 and trying to the ping the IP that I assigned to int s 1/1/0:0 which is 10.3.29.2. It sometimes pings with packet loss and something doesn't ping at all. I can ping the other side of the link successfully with no packet loss.

Before ping:

sh int serial 1/1/0:0

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

Serial1/1/0:0 is up, line protocol is up
  Hardware is DSCC4 Serial
  Internet address is 10.3.29.2/24
  MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:06, output 00:00:08, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/1/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1152 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     19152 packets input, 1319861 bytes, 0 no buffer
     Received 410 broadcasts, 0 runts, 1 giants, 0 throttles
     26 input errors, 15 CRC, 11 frame, 0 overrun, 0 ignored, 0 abort
     19170 packets output, 1318993 bytes, 0 underruns
     0 output errors, 0 collisions, 36 interface resets
     0 output buffer failures, 0 output buffers swapped out
     3 carrier transitions
  Timeslot(s) Used:1-24, SCC: 0, Transmitter delay is 0 flags

After ping:

sh int s 1/1/0:0

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

Serial1/1/0:0 is up, line protocol is up
  Hardware is DSCC4 Serial
  Internet address is 10.3.29.2/24
  MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:05, output 00:00:07, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/1/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1152 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     19175 packets input, 1321523 bytes, 0 no buffer
     Received 427 broadcasts, 0 runts, 1 giants, 0 throttles
     26 input errors, 15 CRC, 11 frame, 0 overrun, 0 ignored, 0 abort
     19191 packets output, 1320497 bytes, 0 underruns
     0 output errors, 0 collisions, 36 interface resets
     0 output buffer failures, 0 output buffers swapped out
     3 carrier transitions
  Timeslot(s) Used:1-24, SCC: 0, Transmitter delay is 0 flags

Before Ping:

sh controller T1 1/1/0

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

T1 1/1/0 is up.
  Applique type is Channelized T1
  Cablelength is long gain36 0db
  Description: T1 to LASVEGAS
  No alarms detected.
  alarm-trigger is not set
  Soaking time: 3, Clearance time: 10
  AIS State:Clear  LOS State:Clear  LOF State:Clear
  Version info Firmware: 20050620, FPGA: 16, spm_count = 0
  Framing is ESF, Line Code is B8ZS, Clock Source is Line.
  CRC Threshold is 320. Reported from firmware  is 320.
   Current port master clock: local osc on this network module
  Data in current interval (477 seconds elapsed):
     0 Line Code Violations, 0 Path Code Violations
     477 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     477 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 1:
     0 Line Code Violations, 0 Path Code Violations
     900 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 2:
     0 Line Code Violations, 0 Path Code Violations
     900 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 3:
     0 Line Code Violations, 0 Path Code Violations
     900 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 4:
     1 Line Code Violations, 2676 Path Code Violations
     755 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     753 Errored Secs, 0 Bursty Err Secs, 2 Severely Err Secs, 145 Unavail Secs
  Data in Interval 5:
     348 Line Code Violations, 1080 Path Code Violations
     527 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     527 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 373 Unavail Secs
  Data in Interval 6:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs
  Total Data (last 6 15 minute intervals):
     349 Line Code Violations, 3756 Path Code Violations,
     3982 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
     3980 Errored Secs, 0 Bursty Err Secs, 2 Severely Err Secs, 1418 Unavail Secs

After Ping:

sh controller T1 1/1/0

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

T1 1/1/0 is up.
  Applique type is Channelized T1
  Cablelength is long gain36 0db
  Description: T1 to LASVEGAS
  No alarms detected.
  alarm-trigger is not set
  Soaking time: 3, Clearance time: 10
  AIS State:Clear  LOS State:Clear  LOF State:Clear
  Version info Firmware: 20050620, FPGA: 16, spm_count = 0
  Framing is ESF, Line Code is B8ZS, Clock Source is Line.
  CRC Threshold is 320. Reported from firmware  is 320.
   Current port master clock: local osc on this network module
  Data in current interval (593 seconds elapsed):
     0 Line Code Violations, 0 Path Code Violations
     593 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     593 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 1:
     0 Line Code Violations, 0 Path Code Violations
     900 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 2:
     0 Line Code Violations, 0 Path Code Violations
     900 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 3:
     0 Line Code Violations, 0 Path Code Violations
     900 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 4:
     1 Line Code Violations, 2676 Path Code Violations
     755 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     753 Errored Secs, 0 Bursty Err Secs, 2 Severely Err Secs, 145 Unavail Secs
  Data in Interval 5:
     348 Line Code Violations, 1080 Path Code Violations
     527 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     527 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 373 Unavail Secs
  Data in Interval 6:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs
  Total Data (last 6 15 minute intervals):
     349 Line Code Violations, 3756 Path Code Violations,
     3982 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
     3980 Errored Secs, 0 Bursty Err Secs, 2 Severely Err Secs, 1418 Unavail Secs

[Subeh Sharma · Accepted solution]

Hi,

In case of Serial and ATM, when you ping the local IP of the interface, packet goes first to the other end and then come back! This is just how they are designed. So, to check the issue, if you don't see any drops locally on the router then try checking the show interface & show controllers e1 counter on the neighboring router. Please do a clear counter before doing anything.

Regards,

Subeh

[OSIManiac]

Thanks for the advice Subeh!

UPDATE:

I enabled encapsulation PPP on all serial interfaces in the test lab and now I'm not dropping any pings to any of them.

int s [serial interface] in my case it was 1/1/0:0

encapsulation ppp