Problem with dropped packets

Discussion in 'Cisco' started by Geatz, Nov 6, 2007.

  1. Geatz

    Geatz

    Joined:
    Nov 6, 2007
    Messages:
    6
    I'm having an issue where I'm getting dropped packets, but I'm not seeing any trace of them being dropped, except under the show interface multilink total output drop. Can anyone tell me how I can stop these packets from being dropped or at least give me an idea where I can look to stop these? I'm getting only 200-400 a day so this isn't dentramental to the network, but I'd at least like to know what packets they are and why they are being dropped. Also the 55 drops under the class-default are old and have not increased while the total dropped output has.




    Current configuration : 4873 bytes
    !
    ! Last configuration change at 15:21:17 UTC Tue Nov 6 2007
    ! NVRAM config last updated at 15:55:02 edt Wed Oct 24 2007
    !
    version 12.3
    service timestamps debug uptime
    service timestamps log uptime
    service password-encryption
    !
    hostname C2651-NY-1
    !
    boot-start-marker
    boot-end-marker
    !
    enable secret 5
    enable password 7
    !
    clock summer-time edt recurring 2 Sun Mar 2:00 1 Sun Nov 2:00
    no network-clock-participate slot 1
    no network-clock-participate wic 0
    no aaa new-model
    ip subnet-zero
    ip cef
    !
    !
    !
    !
    !
    !
    !
    !
    !
    !
    !
    !
    !
    !
    fax interface-type fax-mail
    !
    !
    controller T1 1/0
    framing esf
    linecode b8zs
    channel-group 0 timeslots 1-24 speed 64
    !
    class-map match-all FSS-traffic
    match access-group 104
    class-map match-all voice-signaling
    match access-group 103
    class-map match-all voice-traffic
    match access-group 102
    !
    !
    policy-map VOICE-POLICY
    class voice-signaling
    bandwidth 64
    class voice-traffic
    priority 1024
    class FSS-traffic
    shape average 512000
    bandwidth 400
    queue-limit 512
    class class-default
    fair-queue 256
    queue-limit 96
    shape average 1024000
    !
    buffers small permanent 300
    buffers small max-free 400
    buffers middle permanent 200
    buffers middle max-free 400
    buffers big permanent 100
    buffers big max-free 400
    buffers verybig permanent 25
    buffers verybig max-free 40
    buffers large permanent 10
    buffers large max-free 40
    !
    !
    !
    interface Multilink1
    ip address 10.255.255.2 255.255.255.0
    ip accounting output-packets
    no ip route-cache cef
    no ip route-cache
    ip ospf authentication message-digest
    ip ospf message-digest-key 1 md5 7
    ip ospf cost 50
    no ip mroute-cache
    load-interval 30
    no cdp enable
    ppp multilink
    ppp multilink fragment delay 10
    ppp multilink interleave
    ppp multilink group 1
    service-policy output VOICE-POLICY
    hold-queue 1000 out
    !
    interface FastEthernet0/0
    ip address 10.1.10.250 255.255.255.0
    ip ospf authentication
    ip ospf authentication-key 7 10625A490B43000F
    ip ospf priority 100
    speed 100
    full-duplex
    !
    interface Serial0/0
    no ip address
    encapsulation ppp
    no ip route-cache cef
    no ip route-cache
    no ip mroute-cache
    load-interval 30
    no fair-queue
    ppp multilink
    ppp multilink group 1
    ppp multilink multiclass
    !
    interface FastEthernet0/1
    ip address 10.1.11.250 255.255.255.0
    ip ospf authentication
    ip ospf authentication-key 7 062A5C71421A1B1D
    ip ospf cost 2
    ip ospf priority 100
    speed 100
    full-duplex
    !
    interface Serial0/1
    no ip address
    encapsulation ppp
    no ip route-cache cef
    no ip route-cache
    no ip mroute-cache
    load-interval 30
    no fair-queue
    ppp multilink
    ppp multilink group 1
    ppp multilink multiclass
    !
    interface Serial1/0:0
    no ip address
    encapsulation ppp
    no ip route-cache cef
    no ip route-cache
    load-interval 30
    no fair-queue
    ppp multilink
    ppp multilink group 1
    ppp multilink multiclass
    !
    router eigrp 100
    auto-summary
    no eigrp log-neighbor-changes
    !
    router ospf 10
    router-id 10.1.10.250
    log-adjacency-changes
    network 10.1.10.0 0.0.0.255 area 0.0.0.0
    network 10.1.11.0 0.0.0.255 area 0.0.0.0
    network 10.255.255.0 0.0.0.255 area 10.2.1.0
    !
    no ip http server
    ip classless
    ip route 0.0.0.0 0.0.0.0 10.1.10.254
    ip route 0.0.0.0 0.0.0.0 10.1.10.253
    !
    !
    access-list 102 permit udp any any range 16384 32767
    access-list 103 permit tcp any eq 1720 any
    access-list 103 permit tcp any any eq 1720
    access-list 104 permit ip host 10.1.12.14 any
    access-list 104 permit tcp any eq smtp any
    access-list 104 permit tcp any eq www any
    !
    snmp-server community E1sn3r2RO RO
    snmp-server community E1sn3r2RW RW
    snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart
    snmp-server enable traps tty
    snmp-server enable traps xgcp
    snmp-server enable traps isdn call-information
    snmp-server enable traps isdn layer2
    snmp-server enable traps isdn chan-not-avail
    snmp-server enable traps hsrp
    snmp-server enable traps config
    snmp-server enable traps entity
    snmp-server enable traps envmon
    snmp-server enable traps bgp
    snmp-server enable traps pim neighbor-change rp-mapping-change invalid-pim-message
    snmp-server enable traps ipmulticast
    snmp-server enable traps msdp
    snmp-server enable traps rsvp
    snmp-server enable traps frame-relay
    snmp-server enable traps frame-relay subif
    snmp-server enable traps rtr
    snmp-server enable traps syslog
    snmp-server enable traps dlsw
    snmp-server enable traps dial
    snmp-server enable traps dsp card-status
    snmp-server enable traps ipmobile
    snmp-server enable traps voice poor-qov
    snmp-server enable traps dnis
    snmp-server host 10.1.1.106 E1sn3r2RO
    snmp-server host 10.1.14.14 E1sn3r2RO
    !
    !
    !
    dial-peer cor custom
    !
    !
    !
    !
    line con 0
    line aux 0
    line vty 0 4
    session-timeout 30
    password 7
    login
    line vty 5 15
    password 7
    login
    !
    ntp clock-period 17208677
    ntp server 10.1.10.101 version 2
    !
    end



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

    show int mult 1
    Multilink1 is up, line protocol is up
    Hardware is multilink group interface
    Internet address is 10.255.255.2/24
    MTU 1500 bytes, BW 4624 Kbit, DLY 100000 usec,
    reliability 255/255, txload 26/255, rxload 11/255
    Encapsulation PPP, LCP Open, multilink Open
    Open: IPCP, loopback not set
    Keepalive set (10 sec)
    DTR is pulsed for 2 seconds on reset
    Last input 00:00:05, output never, output hang never
    Last clearing of "show interface" counters 1d06h
    Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 483
    Queueing strategy: Class-based queueing
    Output queue: 0/1000/96/55/17622 (size/max total/threshold/drops/interleaves)
    Conversations 0/91/256 (active/max active/max total)
    Reserved Conversations 2/2 (allocated/max allocated)
    Available Bandwidth 1980 kilobits/sec
    30 second input rate 202000 bits/sec, 142 packets/sec
    30 second output rate 483000 bits/sec, 154 packets/sec
    5817734 packets input, 1312412982 bytes, 0 no buffer
    Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
    0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
    6260320 packets output, 2925087801 bytes, 0 underruns
    0 output errors, 0 collisions, 0 interface resets
    0 output buffer failures, 0 output buffers swapped out
    0 carrier transitions





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





    show polic int mult 1
    Multilink1

    Service-policy output: VOICE-POLICY

    Class-map: voice-signaling (match-all)
    108 packets, 27323 bytes
    30 second offered rate 0 bps, drop rate 0 bps
    Match: access-group 103
    Queueing
    Output Queue: Conversation 265
    Bandwidth 64 (kbps) Max Threshold 64 (packets)
    (pkts matched/bytes matched) 108/27323
    (depth/total drops/no-buffer drops) 0/0/0

    Class-map: voice-traffic (match-all)
    2612441 packets, 532703620 bytes
    30 second offered rate 175000 bps, drop rate 0 bps
    Match: access-group 102
    Queueing
    Strict Priority
    Output Queue: Conversation 264
    Bandwidth 1024 (kbps) Burst 25600 (Bytes)
    (pkts matched/bytes matched) 2612442/532703824
    (total drops/bytes drops) 0/0

    Class-map: FSS-traffic (match-all)
    927050 packets, 453377167 bytes
    30 second offered rate 4000 bps, drop rate 0 bps
    Match: access-group 104
    Traffic Shaping
    Target/Average Byte Sustain Excess Interval Increment
    Rate Limit bits/int bits/int (ms) (bytes)
    512000/512000 3200 12800 12800 25 1600

    Adapt Queue Packets Bytes Packets Bytes Shaping
    Active Depth Delayed Delayed Active
    - 0 609300 188529195 61744 75337650 no
    Queueing
    Output Queue: Conversation 266
    Bandwidth 400 (kbps) Max Threshold 512 (packets)
    (pkts matched/bytes matched) 192611/90196289
    (depth/total drops/no-buffer drops) 0/0/0

    Class-map: class-default (match-any)
    2720064 packets, 1946615658 bytes
    30 second offered rate 419000 bps, drop rate 0 bps
    Match: any
    Queueing
    Flow Based Fair Queueing
    Maximum Number of Hashed Queues 256
    (total queued/total drops/no-buffer drops) 0/55/0
    Traffic Shaping
    Target/Average Byte Sustain Excess Interval Increment
    Rate Limit bits/int bits/int (ms) (bytes)
    1024000/1024000 6400 25600 25600 25 3200

    Adapt Queue Packets Bytes Packets Bytes Shaping
    Active Depth Delayed Delayed Active
    - 0 1859884 1272004341 848922 929489465 no
     
    Last edited: Nov 6, 2007
    Geatz, Nov 6, 2007
    #1
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  2. Geatz

    Geatz

    Joined:
    Nov 6, 2007
    Messages:
    6
    The dropped packets have gotten worse and is starting to affect network performance, if anyone has any insight where I should be looking it would be most appreciated.
     
    Geatz, Nov 12, 2007
    #2
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  3. Geatz

    Geatz

    Joined:
    Nov 6, 2007
    Messages:
    6
    Alright I noticed the drop rate bps went up under the FSS class and that must not be recorded under the total drops of the class. I'm guessing this is because queued packets aren't dropping, my packets are being dropped before being queued. And so it is only being recorded under the total dropped under the show int multilink.
     
    Geatz, Nov 12, 2007
    #3
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