Phil Davis wrote:
Hello,
I have an ATM DS3 coming through a PA-A3-T3. The last few days it
would abruptly go down for 5-10 minutes, perhaps every 12 hours on
average. During these times, the interface would show rapidly growing
carrier signal loss (about 10-20/sec.) I also saw incrementing FEBE
errors. However, neither the provider, nor a third-party transport
provider was detecting LOS on the line...<>
Just wanted to add to this. Overnight we saw the same issue with the
replacement card, so I don't think it's our equipment. I now have some
statistics that show the carrier transition/febe errors. I'm at a loss
to fully interpret the sh controllers atm command. What is the first
column on PLPC errors? Would appreciate any help I could get on this.
Thanks!
Phil
sh int ATM1/0:
ATM1/0 is up, line protocol is up
Hardware is ENHANCED ATM PA
MTU 4470 bytes, sub MTU 4470, BW 40704 Kbit, DLY 190 usec,
reliability 255/255, txload 204/255, rxload 29/255
Encapsulation ATM, loopback not set
Encapsulation(s): AAL5
4095 maximum active VCs, 32 current VCCs
VC Auto Creation Disabled.
VC idle disconnect time: 300 seconds
74 carrier transitions
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 22:12:59
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 4673
Queueing strategy: Per VC Queueing
5 minute input rate 4695000 bits/sec, 2630 packets/sec
5 minute output rate 32647000 bits/sec, 3750 packets/sec
132076194 packets input, 900144269 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
38 input errors, 38 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
174968028 packets output, 1377286139 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
I do see some CRC errors now, which did not see previously. That may be
from insertion.
sh controller atm 1/0:
Interface ATM1/0 is up
Hardware is ENHANCED ATM PA - DS3 (45000Kbps)
Framer is PMC PM7345 S/UNI-PDH, SAR is LSI ATMIZER II
Firmware rev: G153, Framer rev: 1, ATMIZER II rev: 3
idb=0x63A1F0D4, ds=0x63A491E0, vc=0x63A572E0
slot 1, unit 1, subunit 0, fci_type 0x005B, ticks 79887
1200 rx buffers: size=512, encap=64, trailer=28, magic=4
Curr Stats:
VCC count: current=32, peak=32
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=0, rx_no_buffer=0, rx_crc_10=0, rx_no_mem=0
rx_cell_len=0, rx_no_vcd=34410, rx_cell_throttle=0, tx_aci_err=0
Rx Free Ring status:
base=0x3CA7C040, size=2048, write=400
Rx Compl Ring status:
base=0x7E4DB7E0, size=2048, read=1662
Tx Ring status:
base=0x3CF13A40, size=8192, write=312
Tx Compl Ring status:
base=0x0E1B3840, size=4096, read=156
BFD Cache status:
base=0x65F45940, size=6144, read=6143
Rx Cache status:
base=0x64458360, size=16, write=14
Tx Shadow status:
base=0x66691E60, size=8192, read=303, write=312
Control data:
rx_max_spins=42, max_tx_count=144, tx_count=9
rx_threshold=800, rx_count=14, tx_threshold=4608
tx bfd write indx=0x10DF, rx_pool_info=0x63A208C0
Control data base address:
rx_buf_base = 0x0E3A6C80 rx_p_base = 0x66802E80
rx_pak = 0x639727DC cmd = 0x64752080
framer = 0x60479798 framer_cb = 0x6474FB80
framer_base = 0x3C900000 pci_pa_stats = 0x7E391900
device_base[0] = 0x3C800000 device_base[1] = 0x3CC00000
ssram_base[0] = 0x3CA00000 ssram_base[1] = 0x3CE00000
sdram_base[0] = 0x3CB00000 sdram_base[1] = 0x3CF00000
pa_cmd_buf[0] = 0x3CA7FC00 pa_cmd_buf[1] = 0x3CE7FC00
vcd_base[0] = 0x3CA00000 vcd_base[1] = 0x3CE18000
chip_dump[0] = 0x0E39192C chip_dump[1] = 0x0E391A2C
sar_buf_base[0] = 0x3CB24000 sar_buf_base[1] = 0x3CF1C000
bfd_base[0] = 0x3CA64000 bfd_base[1] = 0x3CE00000
acd_base[0] = 0x3CA22080 acd_base[1] = 0x3CE38240
Framer Information:
Framing mode: DS3 C-bit PLCP
No alarm detected
Facility statistics: current interval elapsed 687 seconds
lcv fbe ezd pe ppe febe hcse
----------------------------------------------------------------------
21 2 0 1 1 1 0 0
25 2 0 1 0 0 0 0
33 0 0 0 0 0 865055 0
34 0 0 0 0 0 5002913 0
38 0 0 0 0 0 7526033 0
39 0 0 0 0 0 3415647 0
40 0 0 0 0 0 1498637 0
42 0 0 0 0 0 217324 0
44 0 0 0 0 0 2972255 0
68 2 0 1 0 0 0 0
78 1 0 1 1 1 0 0
PLCP Errors:
bipe fbe febe
-----------------------------
21 1 0 0
25 2 0 0
33 0 0 65655
34 0 0 272680
38 0 0 1744705
39 0 0 2043937
40 0 0 957544
42 0 0 21423
44 0 0 866414
68 1 0 0
78 1 0 0
lcv: Line Code Violation
fbe: Framing Bit Error
ezd: Summed Excessive Zeros
pe: Parity Error
ppe: Path Parity Error
febe: Far-end Block Error
hcse: Rx Cell HCS Error
bipe: Bit Interleave Parity (B1) Error
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