[cisco-bba] Maximum active VCs on PA-A3

[Mounir Mohamed]

Dear Alirez,

A lot of variables  could cause your issue, IF the delay you facing with all
traffic pass such interface only, so it could be due to high ATM load on the
PA port.

Best Regards,
Mounir Mohamed

On 10/31/06, guy - <alirez at hotmail.com> wrote:
>
>  Hi
>
> I have a cisco 7206VXR with NPE-G1, 1G Memory and running IOS image:
> c7200-js-mz.123-19.
>
> The maximum limit of active VCs on PA-A3 is 4095, but I am observing high
> latency and packet drops when the active VCs get upto 3000.
>
> Following are the interface and controller stats:
>
>
> #sh controllers atm6/0
> Interface ATM6/0 is up
> Hardware is ENHANCED ATM PA - OC3 (155000Kbps)
> Framer is PMC PM5346 S/UNI-155-LITE, SAR is LSI ATMIZER II
> Firmware rev: G161, Framer rev: 0, ATMIZER II rev: 3
>   idb=0x639A48BC, ds=0x639A5B80, vc=0x500F6CA0
>   slot 6, unit 1, subunit 0, fci_type 0x0056, ticks 3234
>   4000 rx buffers: size=512, encap=64, trailer=28, magic=4
> Curr Stats:
>   VCC count: current=3062, peak=3070
>   AAL2 VCC count: 0
>   AAL2 TX no buffer count: 0
>   AAL2 RX no buffer count: 0
>   SAR crashes: Rx SAR=0, Tx SAR=0
>   rx_cell_lost=14407, rx_no_buffer=0, rx_crc_10=3219, rx_no_mem=0
>   rx_cell_len=0, rx_no_vcd=93544, rx_cell_throttle=0, tx_aci_err=0
>   rx_autovc_hash_err 0
> Rx Free Ring status:
>   base=0x3F27C040, size=4096, write=680
> Rx Compl Ring status:
>   base=0x0C64AD80, size=4096, read=3914
> Tx Ring status:
>   base=0x3F7039C0, size=8192, write=6318
> Tx Compl Ring status:
>   base=0x0C3B0040, size=4096, read=159
> BFD Cache status:
>   base=0x639EA5A0, size=6144, read=143
> Rx Cache status:
>   base=0x639EA500, size=16, write=0
> Tx Shadow status:
>   base=0x20093E80, size=8192, read=6303, write=6318
> Control data:
>   rx_max_spins=86, max_tx_count=98, tx_count=15
>   rx_threshold=2667, rx_count=278, tx_threshold=4608
>   tx bfd write indx=0x11F6, rx_pool_info=0x500F4CE0
> Control data base address:
>        rx_buf_base = 0x0C3F8EE0        rx_p_base = 0x639ABC40
>             rx_pak = 0x63919A44              cmd = 0x639AB880
>             framer = 0x604914F0        framer_cb = 0x500F0D20
>        framer_base = 0x3F100000     pci_pa_stats = 0x0C39F840
>     device_base[0] = 0x3F000000   device_base[1] = 0x3F400000
>      ssram_base[0] = 0x3F200000    ssram_base[1] = 0x3F600000
>      sdram_base[0] = 0x3F300000    sdram_base[1] = 0x3F700000
>      pa_cmd_buf[0] = 0x3F27FC00    pa_cmd_buf[1] = 0x3F67FC00
>        vcd_base[0] = 0x3F200000      vcd_base[1] = 0x3F618000
>       chip_dump[0] = 0x0C39F86C     chip_dump[1] = 0x0C39F96C
>    sar_buf_base[0] = 0x3F324000  sar_buf_base[1] = 0x3F70C000
>        bfd_base[0] = 0x3F264000      bfd_base[1] = 0x3F600000
>        acd_base[0] = 0x3F222080      acd_base[1] = 0x3F638240
> Bad particle count = 0
> SAR AutoRecovery : Disabled
> SAR AR   rx stuck count=0  tx stuck count=0
>          rx_crashes    =0  tx_crashes    =0
> Framer Information:
>  Framing mode: SONET (STS-3c)
>  No alarm detected
> Facility statistics: current interval elapsed 534 seconds
>           sbip      lbip      lfebe      pbip     pfebe    hcse
>    ------------------------------------------------------------
>  3          0         0         0      1871      1068         0
>
>    sbip:  Section BIP8
>    lbip:  Line BIP8/24
>    lfebe: Line FEBE
>    pbip:  Path BIP8
>    pfebe: Path FEBE
>    hcse:  Rx Cell HCS Error
>
> #sh int atm6/0
> ATM6/0 is up, line protocol is up
>   Hardware is ENHANCED ATM PA
>   MTU 4470 bytes, sub MTU 4470, BW 149760 Kbit, DLY 80 usec,
>      reliability 255/255, txload 94/255, rxload 24/255
>   Encapsulation ATM, loopback not set
>   Encapsulation(s): AAL5
>   4095 maximum active VCs, 3063 current VCCs
>   VC Auto Creation Enabled.
>   VC idle disconnect time: 300 seconds
>   0 carrier transitions
>   Last input 00:00:00, output 00:00:00, output hang never
>   Last clearing of "show interface" counters never
>   Input queue: 0/75/18/2 (size/max/drops/flushes); Total output drops:
> 1395753
>   Queueing strategy: Per VC Queueing
>   30 second input rate 14158000 bits/sec, 9040 packets/sec
>   30 second output rate 55515000 bits/sec, 8446 packets/sec
>      31701163 packets input, 2755844055 bytes, 46242518 no buffer
>      Received 6 broadcasts, 0 runts, 0 giants, 0 throttles
>      18824 input errors, 18824 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
>      29634327 packets output, 1468176365 bytes, 0 underruns
>      0 output errors, 0 collisions, 0 interface resets
>      0 output buffer failures, 0 output buffers swapped out
>
>
>
>
> Regards
>
>
>
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>


-- 
Best Reagrds,
Mounir Mohamed
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