[c-nsp] Strange DS3 Problems

[Adam Piasecki]

I have a DS3 terminating to a cisco 7200 NPE200 NonVXR router, With a
defualt route to my ISP.

At the DS3 Dmarc it's going into a fiber-to-ds3 converter made by Transition
Networks,
This rides SM fiber over to my router where it breaks back out to coax. I
needed an Attunator, because the signal levels coming out of the
Fiber converter were too hot for the PA-T3, giving me LCV errors. I have
since fixed that.

Overview

DS3 DMARC <-> Coax to Fiber <--SM Fiber--> Fiber to Coax <-> 10db Attunator
<-> Cisco PA-T3 in router


I'm currently having two problems with the Ds3,

1) The max download speed i've ever gotten is 700kb/s, this doesn't seem
right at all for 10/10mb dedicated, 45mb burstable.
2) the Ds3 is bouncing. It goes into a down/down state and i'll have a FERF
alarm light on the router. This will clear in about 20-30secs without me
doing anything.
It seems to happen more when the Ds3 is under load, though it has happend
without any load.


What I can do,

1) I can ping the living daylight out of the ISP serial side IP, 20000 pings
3700byte packets with 0% lost, 3ms max.
In past this to me, would mean a clean working ds3.
2) I can ping everything else in the world, with decent ping times.
3) I've looped back all the way up to the dmarc, and it works just fine.
Though at this point, it's appars to be working fine to the ISP also.

Questions

1) What is the rx FEBE since last clear counter mean? I notice this is the
only sort of error i'm getting now.
2) Is a 7206 non-VXR NPE 200 strong enough for a full DS3, if i'm just doing
a default route, and a very small ACL.
3) Is it possible that i have a BAD PA-T3, I did have it connected without
the Attunator for sometime,
and i'm afraid that might have fried something.
4) Has anyone used Fiber to DS3 converters in the past? Good/Bad?

Thanks,
Adam

interface Serial1/0
 description DS3 to INTERNET
 ip address x.x.x.70 255.255.255.252
 encapsulation ppp
 dsu bandwidth 44210
 framing c-bit
 cablelength 10
 serial restart-delay 0
======================
Serial1/0 is up, line protocol is up
  Hardware is M1T-T3 pa
  Description: DS3 to INTERNET
  Internet address is X.X.X.X/30
  MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, LCP Open
  Listen: CDPCP
  Open: IPCP, crc 16, loopback not set
  Keepalive set (10 sec)
  Restart-Delay is 0 secs
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters 00:33:33
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 9
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 35000 bits/sec, 93 packets/sec
  5 minute output rate 35000 bits/sec, 92 packets/sec
     320718 packets input, 19987776 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
              0 parity
     1 input errors, 1 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     318582 packets output, 19781951 bytes, 0 underruns
     0 output errors, 0 applique, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     6 carrier transitions
   rxLOS inactive, rxLOF inactive, rxAIS inactive
   txAIS inactive, rxRAI inactive, txRAI inactive
======================
M1T-T3 pa: show controller:
PAS unit 0, subunit 0, f/w version 3-93, rev ID 0x2800001, version 3
idb = 0x63539854, ds = 0x6353AFFC, ssb=0x6353B3B0
Clock mux=0x30, ucmd_ctrl=0x0, port_status=0x1
Serial config=0x8, line config=0x1B0202
maxdgram=4500, bufpool=128Kb, 256 particles

   rxLOS inactive, rxLOF inactive, rxAIS inactive
   txAIS inactive, rxRAI inactive, txRAI inactive
line state: up
cable type : T3  cable, received clockrate 44201430

base0 registers=0x3C800000, base1 registers=0x3C802000
rx_base0 registers=0x3C820000, rx_base1 registers=0x3C822000
mxt_ds=0x63B85E1C, rx ring entries=124, tx ring entries=254
statring=0x4B05A300, statr shadow=0x6353D0AC, stat_head=47
plus_pa: rx_statring=0x4B05A740, rx_statr shadow=0x6353D8D8, rx_stat_head=10
rxring=0x4B05A0C0, rxr shadow=0x6353CA80, rx_head=71
txring=0x4B05AC80, txr shadow=0x6353DD04, tx_head=157, tx_tail=157,
tx_count=0
throttled=0, enabled=0
halted=0, last halt reason=0
Microcode fatal errors=0
rx_no_eop_err=0, rx_no_stp_err=0, rx_no_eop_stp_err=0
rx_no_buf=0, rx_soft_overrun_err=0, dump_err= 0, bogus=0, mxt_flags=0x2C
tx_underrun_err=0, tx_soft_underrun_err=0, tx_limited=0(256)
tx_fullring=0, tx_started=1775246, mxt_flush_count=0
rx_int_count=5782051, tx_int_count=2357850
   Framing is c-bit, Clock Source is Line
   Bandwidth limit is 44210, DSU mode 0, Cable length is 10
   rx FEBE since last clear counter 125585, since reset 1721663
   Data in current interval (143 seconds elapsed):
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation
     0 P-bit Err Secs, 0 P-bit Sev Err Secs
     0 Sev Err Framing Secs, 0 Unavailable Secs
     0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
  Data in Interval 1:
     2 Line Code Violations, 1 P-bit Coding Violation
     1 C-bit Coding Violation
     1 P-bit Err Secs, 0 P-bit Sev Err Secs
     0 Sev Err Framing Secs, 124 Unavailable Secs
     2 Line Errored Secs, 1 C-bit Errored Secs, 0 C-bit Sev Err Secs
   Total Data (last 1 15 minute intervals):
     2 Line Code Violations, 1 P-bit Coding Violation,
     1 C-bit Coding Violation,
     1 P-bit Err Secs, 0 P-bit Sev Err Secs,
     0 Sev Err Framing Secs, 124 Unavailable Secs,
     2 Line Errored Secs, 1 C-bit Errored Secs, 0 C-bit Sev Err Secs

   No alarms detected.
   Last FEAC code received: OOF
================================