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