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

Mounir Mohamed mounir.mohamed at gmail.com
Wed Nov 1 08:01:57 EST 2006


Dear Alirez,

Try to use more than one Virtual-templete to terminate the PPPOE customers.

Best Regards,
Mounir Mohamed

On 11/1/06, guy - <alirez at hotmail.com> wrote:
>
>  Dear Mounir Mohamed
>
> Thanks for the reply, we are terminating more around 2500 PPPoE sessions
> and this issue occurs when the PPPoE session goes beyond 2000. Is there a
> way to solve this?
>
> Regards
>
>
>
>
>
> ------------------------------
> From: *"Mounir Mohamed" <mounir.mohamed at gmail.com>*
> To: *"guy -" <alirez at hotmail.com>*
> CC: *cisco-bba at puck.nether.net*
> Subject: *Re: [cisco-bba] Maximum active VCs on PA-A3*
> Date: *Tue, 31 Oct 2006 15:07:01 +0200*
>
> 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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-- 
Best Reagrds,
Mounir Mohamed
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