ATM IMA Link Flops like clockwork

Discussion in 'Cisco' started by BitBucket, Mar 2, 2004.

  1. BitBucket

    BitBucket Guest

    Hello all,

    We have an IMA T1 with 1 link to our ISP. Every 20 minutes the link fails
    and then comes back up. It stays down for a minute or more. You can almost
    set your watch by it. Sometimes it occurs at 19 minutes, sometimes at 21
    minutes but almost always at the 20 minute mark +/- a few seconds. My ISP
    has stress tested the line with a T-bird and said the line was clean. Here
    is my config. Any help will be GREATLY appreciated.

    bdc_3725_ATM#sh run
    Building configuration...

    Current configuration : 2289 bytes
    !
    ! Last configuration change at 11:52:51 EST Thu Feb 26 2004
    ! NVRAM config last updated at 11:42:41 EST Thu Feb 26 2004
    !
    version 12.2
    service timestamps debug datetime localtime
    service timestamps log datetime localtime
    service password-encryption
    !
    hostname bdc_3725_ATM
    !
    logging buffered 10000 debugging
    no logging console
    enable secret 5 $1$q5i5$Kq2AmBu4o.MBlwAxo.mm40
    !
    clock timezone EST -5
    clock summer-time EDT recurring
    ip subnet-zero
    no ip source-route
    !
    !
    no ip domain-lookup
    !
    !
    !
    !
    !
    !
    !
    !
    fax interface-type fax-mail
    mta receive maximum-recipients 0
    !
    bridge crb
    !
    !
    !
    interface FastEthernet0/0
    no ip address
    no ip mroute-cache
    duplex auto
    speed auto
    bridge-group 1
    !
    interface FastEthernet0/1
    ip address 205.244.xxx.xxx 255.255.255.224
    no ip mroute-cache
    no keepalive
    duplex auto
    speed auto
    !
    interface ATM1/0
    no ip address
    no ip mroute-cache
    no atm ilmi-keepalive
    ima-group 0
    no scrambling-payload
    cablelength short 133
    !
    interface ATM1/1
    no ip address
    no ip mroute-cache
    no atm ilmi-keepalive
    ima-group 0
    no scrambling-payload
    !
    interface ATM1/2
    no ip address
    no ip mroute-cache
    shutdown
    no atm ilmi-keepalive
    ima-group 0
    no scrambling-payload
    !
    interface ATM1/3
    no ip address
    no ip mroute-cache
    shutdown
    no atm ilmi-keepalive
    ima-group 0
    no scrambling-payload
    !
    interface ATM1/IMA0
    no ip address
    no atm ilmi-keepalive
    pvc BDC 15/15
    encapsulation aal5snap
    !
    bridge-group 1
    !
    ip default-gateway 205.244.xxx.xxx
    ip classless
    ip route 0.0.0.0 0.0.0.0 205.244.xxx.xxx
    ip http server
    ip pim bidir-enable
    !
    !
    !
    !
    bridge 1 protocol dec
    call rsvp-sync
    !
    !
    mgcp profile default
    !
    dial-peer cor custom
    !
    !
    !
    banner motd ^C

    And here is the output from the sh controller atm1/0

    bdc_3725_ATM#sh controller atm1/0
    Interface ATM1/0 is up
    Hardware is ATM T1
    LANE client MAC address is 000b.fdc9.a5f0
    hwidb=0x62A19ADC, ds=0x62A369E0
    slot 1, unit 0, subunit 0
    rs8234 base 0x3D000000, slave base 0x3D000000
    rs8234 ds 0x62A369E0
    SBDs - avail 2048, guaranteed 1, unguaranteed 2047, starved 0
    Seg VCC table 3D00DD80, Shadow Seg VCC Table 62A53B88, VCD Table 62A69BB4
    Schedule table 3D018D80, Shadow Schedule table 62A6FBE0, Size 63D
    RSM VCC Table 3D070D00, Shadow RSM VCC Table 62AB3DB0
    VPI Index Table 3D02E880, VCI Index Table 3D030D00
    Bucket2 Table 3D020A80, Shadow Bucket2 Table 62A71500
    MCR Limit Table 3D020E80, Shadow MCR Table 62A7312C
    ABR template 3D021080, Shadow template 623A1970
    RM Cell RS Queue 3D02ED00
    Queue TXQ Addr Pos StQ Addr Pos
    0 UBR CHN0 3D02B080 87 063BCDE0 87
    1 UBR CHN1 3D02B480 0 063BD5E0 0
    2 UBR CHN2 3D02B880 0 063BDDE0 0
    3 UBR CHN3 3D02BC80 0 063BE5E0 0
    4 VBR/ABR CHN0 3D02C080 0 063BEDE0 0
    5 VBR/ABR CHN1 3D02C480 0 063BF5E0 0
    6 VBR/ABR CHN2 3D02C880 0 063BFDE0 0
    7 VBR/ABR CHN3 3D02CC80 0 063C05E0 0
    8 VBR-RT CHN0 3D02D080 0 063C0DE0 0
    9 VBR-RT CHN1 3D02D480 0 063C15E0 0
    10 VBR-RT CHN2 3D02D880 0 063C1DE0 0
    11 VBR-RT CHN3 3D02DC80 0 063C25E0 0
    12 SIG 3D02E080 0 063C2DE0 0
    13 VPD 3D02E480 0 063C35E0 0

    Queue FBQ Addr Pos RSQ Addr Pos
    0 OAM 3D07CD00 0 063C3EA0 1
    1 UBR CHN0 3D07DD00 109 063C4EA0 49
    2 UBR CHN1 3D07ED00 0 063C5EA0 0
    3 UBR CHN2 3D07FD00 0 063C6EA0 0
    4 UBR CHN3 3D080D00 0 063C7EA0 0
    5 VBR/ABR CHN0 3D081D00 0 063C8EA0 0
    6 VBR/ABR CHN1 3D082D00 0 063C9EA0 0
    7 VBR/ABR CHN2 3D083D00 0 063CAEA0 0
    8 VBR/ABR CHN3 3D084D00 0 063CBEA0 0
    9 VBR-RT CHN0 3D085D00 0 063CCEA0 0
    10 VBR-RT CHN1 3D086D00 0 063CDEA0 0
    11 VBR-RT CHN2 3D087D00 0 063CEEA0 0
    12 VBR-RT CHN3 3D088D00 0 063CFEA0 0
    13 SIG 3D089D00 0 063D0EA0 0
    SAR Scheduling channels: 0 -1 -1 -1 -1 -1 -1 -1
    Part of IMA group 0
    Link 0 IMA Info:
    group index is 0
    Tx link id is 0, Tx link state is active
    Rx link id is 0, Rx link state is active
    Rx link failure status is noFailure,
    0 tx failures, 307 rx failures
    Link 0 Framer Info:
    framing is ESF, line code is B8ZS, fdl is ANSI
    cable-length is short 0-133ft,
    clock src is line, payload-scrambling is disabled, no loopback
    line status is 0x1; or no alarm.
    port is active, link is available
    35384 idle rx, 0 correctable hec rx, 0 uncorrectable hec rx
    1636647749 cells rx, 1637275883 cells tx, 0 rx fifo overrun.
    Link (0):DS1 MIB DATA:
    Data in current interval (155 seconds elapsed):
    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, 0 Unavail Secs
    Total Data (last 24 hours)
    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, 0 Unavail Secs
    SAR counter totals across all links and groups:
    13826505 cells output, 17 cells stripped
    33316473 cells input, 3234 cells discarded, 0 AAL5 frames discarded
    0 pci bus err, 0 dma fifo full err, 0 rsm parity err
    0 rsm syn err, 0 rsm/seg q full err, 0 rsm overflow err
    0 hs q full err, 0 no free buff q err, 0 seg underflow err
    0 host seg stat q full err
    bdc_3725_ATM#
    BitBucket, Mar 2, 2004
    #1
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  2. BitBucket

    Frank Beider Guest

    Here are some ideas

    Looking at your configuration it appears that this is a two T-1 IMA. Are
    you actually using two T-1s? You say that you "have an IMA T1 with 1 link
    to our ISP" How many T-1s do you have active for the IMA. From your
    configuration it looks like you have 3 T-1s. Is that correct?

    Here are some commands to try

    Show controllers ATM
    Show ima interface
    show ima interface atm1/0
    show ima interface atm1/1
    show ima interface atm1/2
    show ima interface atm1/2

    Is this an IMA that goes directly to your ISPs equipment or does this IMA
    group terminate on a carriers ATM switch?

    Regards
    "BitBucket" <> wrote in message
    news:c22uth$7bnm$...
    > Hello all,
    >
    > We have an IMA T1 with 1 link to our ISP. Every 20 minutes the link fails
    > and then comes back up. It stays down for a minute or more. You can

    almost
    > set your watch by it. Sometimes it occurs at 19 minutes, sometimes at 21
    > minutes but almost always at the 20 minute mark +/- a few seconds. My ISP
    > has stress tested the line with a T-bird and said the line was clean.

    Here
    > is my config. Any help will be GREATLY appreciated.
    >
    > bdc_3725_ATM#sh run
    > Building configuration...
    >
    > Current configuration : 2289 bytes
    > !
    > ! Last configuration change at 11:52:51 EST Thu Feb 26 2004
    > ! NVRAM config last updated at 11:42:41 EST Thu Feb 26 2004
    > !
    > version 12.2
    > service timestamps debug datetime localtime
    > service timestamps log datetime localtime
    > service password-encryption
    > !
    > hostname bdc_3725_ATM
    > !
    > logging buffered 10000 debugging
    > no logging console
    > enable secret 5 $1$q5i5$Kq2AmBu4o.MBlwAxo.mm40
    > !
    > clock timezone EST -5
    > clock summer-time EDT recurring
    > ip subnet-zero
    > no ip source-route
    > !
    > !
    > no ip domain-lookup
    > !
    > !
    > !
    > !
    > !
    > !
    > !
    > !
    > fax interface-type fax-mail
    > mta receive maximum-recipients 0
    > !
    > bridge crb
    > !
    > !
    > !
    > interface FastEthernet0/0
    > no ip address
    > no ip mroute-cache
    > duplex auto
    > speed auto
    > bridge-group 1
    > !
    > interface FastEthernet0/1
    > ip address 205.244.xxx.xxx 255.255.255.224
    > no ip mroute-cache
    > no keepalive
    > duplex auto
    > speed auto
    > !
    > interface ATM1/0
    > no ip address
    > no ip mroute-cache
    > no atm ilmi-keepalive
    > ima-group 0
    > no scrambling-payload
    > cablelength short 133
    > !
    > interface ATM1/1
    > no ip address
    > no ip mroute-cache
    > no atm ilmi-keepalive
    > ima-group 0
    > no scrambling-payload
    > !
    > interface ATM1/2
    > no ip address
    > no ip mroute-cache
    > shutdown
    > no atm ilmi-keepalive
    > ima-group 0
    > no scrambling-payload
    > !
    > interface ATM1/3
    > no ip address
    > no ip mroute-cache
    > shutdown
    > no atm ilmi-keepalive
    > ima-group 0
    > no scrambling-payload
    > !
    > interface ATM1/IMA0
    > no ip address
    > no atm ilmi-keepalive
    > pvc BDC 15/15
    > encapsulation aal5snap
    > !
    > bridge-group 1
    > !
    > ip default-gateway 205.244.xxx.xxx
    > ip classless
    > ip route 0.0.0.0 0.0.0.0 205.244.xxx.xxx
    > ip http server
    > ip pim bidir-enable
    > !
    > !
    > !
    > !
    > bridge 1 protocol dec
    > call rsvp-sync
    > !
    > !
    > mgcp profile default
    > !
    > dial-peer cor custom
    > !
    > !
    > !
    > banner motd ^C
    >
    > And here is the output from the sh controller atm1/0
    >
    > bdc_3725_ATM#sh controller atm1/0
    > Interface ATM1/0 is up
    > Hardware is ATM T1
    > LANE client MAC address is 000b.fdc9.a5f0
    > hwidb=0x62A19ADC, ds=0x62A369E0
    > slot 1, unit 0, subunit 0
    > rs8234 base 0x3D000000, slave base 0x3D000000
    > rs8234 ds 0x62A369E0
    > SBDs - avail 2048, guaranteed 1, unguaranteed 2047, starved 0
    > Seg VCC table 3D00DD80, Shadow Seg VCC Table 62A53B88, VCD Table 62A69BB4
    > Schedule table 3D018D80, Shadow Schedule table 62A6FBE0, Size 63D
    > RSM VCC Table 3D070D00, Shadow RSM VCC Table 62AB3DB0
    > VPI Index Table 3D02E880, VCI Index Table 3D030D00
    > Bucket2 Table 3D020A80, Shadow Bucket2 Table 62A71500
    > MCR Limit Table 3D020E80, Shadow MCR Table 62A7312C
    > ABR template 3D021080, Shadow template 623A1970
    > RM Cell RS Queue 3D02ED00
    > Queue TXQ Addr Pos StQ Addr Pos
    > 0 UBR CHN0 3D02B080 87 063BCDE0 87
    > 1 UBR CHN1 3D02B480 0 063BD5E0 0
    > 2 UBR CHN2 3D02B880 0 063BDDE0 0
    > 3 UBR CHN3 3D02BC80 0 063BE5E0 0
    > 4 VBR/ABR CHN0 3D02C080 0 063BEDE0 0
    > 5 VBR/ABR CHN1 3D02C480 0 063BF5E0 0
    > 6 VBR/ABR CHN2 3D02C880 0 063BFDE0 0
    > 7 VBR/ABR CHN3 3D02CC80 0 063C05E0 0
    > 8 VBR-RT CHN0 3D02D080 0 063C0DE0 0
    > 9 VBR-RT CHN1 3D02D480 0 063C15E0 0
    > 10 VBR-RT CHN2 3D02D880 0 063C1DE0 0
    > 11 VBR-RT CHN3 3D02DC80 0 063C25E0 0
    > 12 SIG 3D02E080 0 063C2DE0 0
    > 13 VPD 3D02E480 0 063C35E0 0
    >
    > Queue FBQ Addr Pos RSQ Addr Pos
    > 0 OAM 3D07CD00 0 063C3EA0 1
    > 1 UBR CHN0 3D07DD00 109 063C4EA0 49
    > 2 UBR CHN1 3D07ED00 0 063C5EA0 0
    > 3 UBR CHN2 3D07FD00 0 063C6EA0 0
    > 4 UBR CHN3 3D080D00 0 063C7EA0 0
    > 5 VBR/ABR CHN0 3D081D00 0 063C8EA0 0
    > 6 VBR/ABR CHN1 3D082D00 0 063C9EA0 0
    > 7 VBR/ABR CHN2 3D083D00 0 063CAEA0 0
    > 8 VBR/ABR CHN3 3D084D00 0 063CBEA0 0
    > 9 VBR-RT CHN0 3D085D00 0 063CCEA0 0
    > 10 VBR-RT CHN1 3D086D00 0 063CDEA0 0
    > 11 VBR-RT CHN2 3D087D00 0 063CEEA0 0
    > 12 VBR-RT CHN3 3D088D00 0 063CFEA0 0
    > 13 SIG 3D089D00 0 063D0EA0 0
    > SAR Scheduling channels: 0 -1 -1 -1 -1 -1 -1 -1
    > Part of IMA group 0
    > Link 0 IMA Info:
    > group index is 0
    > Tx link id is 0, Tx link state is active
    > Rx link id is 0, Rx link state is active
    > Rx link failure status is noFailure,
    > 0 tx failures, 307 rx failures
    > Link 0 Framer Info:
    > framing is ESF, line code is B8ZS, fdl is ANSI
    > cable-length is short 0-133ft,
    > clock src is line, payload-scrambling is disabled, no loopback
    > line status is 0x1; or no alarm.
    > port is active, link is available
    > 35384 idle rx, 0 correctable hec rx, 0 uncorrectable hec rx
    > 1636647749 cells rx, 1637275883 cells tx, 0 rx fifo overrun.
    > Link (0):DS1 MIB DATA:
    > Data in current interval (155 seconds elapsed):
    > 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, 0 Unavail

    Secs
    > Total Data (last 24 hours)
    > 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, 0 Unavail

    Secs
    > SAR counter totals across all links and groups:
    > 13826505 cells output, 17 cells stripped
    > 33316473 cells input, 3234 cells discarded, 0 AAL5 frames discarded
    > 0 pci bus err, 0 dma fifo full err, 0 rsm parity err
    > 0 rsm syn err, 0 rsm/seg q full err, 0 rsm overflow err
    > 0 hs q full err, 0 no free buff q err, 0 seg underflow err
    > 0 host seg stat q full err
    > bdc_3725_ATM#
    >
    >
    Frank Beider, Mar 5, 2004
    #2
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