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. However, the far side did see a
relatively small number of FEBE errors.
I swapped the interface and it's been quiet for last few hours, though
it remains to be seen if that's the last of the issue. Does this make
sense to anybody? I don't understand why an erroring PA would detect LOS
without LOS being present. Could it have been bouncing in and out of
loopback?
sh run int ATM1/0:
interface ATM1/0
no ip address
no ip mroute-cache
atm scrambling cell-payload
atm framing cbitplcp
no atm auto-configuration
no atm ilmi-keepalive
no atm address-registration
no atm ilmi-enable
no clns route-cache
end
sh diag 1:
ATM WAN DS3 Port adapter, 1 port
Port adapter is analyzed
Port adapter insertion time 02:39:05 ago
EEPROM contents at hardware discovery:
Hardware revision 2.0 Board revision A0
Serial number 23121181 Part number 73-2432-04
FRU Part Number: PA-A3-T3=
Test history 0x0 RMA number 00-00-00
EEPROM format version 1
EEPROM contents (hex):
0x00: 01 5B 02 00 01 60 CD 1D 49 09 80 04 00 00 00 00
0x10: 50 00 00 00 00 09 17 00 FF FF FF FF FF FF FF FF
sh contr atm1/0:
Slot 1:
ATM WAN DS3 Port adapter, 1 port
Port adapter is analyzed
Port adapter insertion time 02:39:05 ago
EEPROM contents at hardware discovery:
Hardware revision 2.0 Board revision A0
Serial number 23121181 Part number 73-2432-04
FRU Part Number: PA-A3-T3=
Test history 0x0 RMA number 00-00-00
EEPROM format version 1
EEPROM contents (hex):
0x00: 01 5B 02 00 01 60 CD 1D 49 09 80 04 00 00 00 00
0x10: 50 00 00 00 00 09 17 00 FF FF FF FF FF FF FF FF
sh contr atm1/0:
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 9682
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=313, rx_cell_throttle=0, tx_aci_err=0
Rx Free Ring status:
base=0x3CA7C040, size=2048, write=1016
Rx Compl Ring status:
base=0x7E4DB7E0, size=2048, read=834
Tx Ring status:
base=0x3CF13A40, size=8192, write=2205
Tx Compl Ring status:
base=0x0E1B3840, size=4096, read=1101
BFD Cache status:
base=0x65F45940, size=6144, read=6140
Rx Cache status:
base=0x64458360, size=16, write=2
Tx Shadow status:
base=0x66691E60, size=8192, read=2191, write=2205
Control data:
rx_max_spins=22, max_tx_count=144, tx_count=14
rx_threshold=800, rx_count=2, tx_threshold=4608
tx bfd write indx=0x47C, 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 682 seconds
lcv fbe ezd pe ppe febe hcse
----------------------------------------------------------------------
0 1 0 1 1 1 0 0
PLCP Errors:
bipe fbe febe
-----------------------------
0 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
Thanks!
Phil
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