Re: POS Issues

You have a lot of NSE there. This is typically due to synchronization
problems (timing) on a link due to incorrect clock or degraded signal.
(Might want to check light levels on either end, and db pad if needed, could
be lack of attenuation). Have your provider check clocking, etc. The rate of
NSE should not increase with load. Fiber might need cleaning.

Cisco interfaces only report NSE based on what they see, the interface
itself does not generate this.

There is an acceptable level of NSE's per day but this depends on your clock
stratum. Your provider can explain this to you.

BIP3 errors are path level. The B3 byte carries the path parity. So are NSE
errors, PATH.

Tell your telco provider your seeing BIP(B3) and NSE from your router that
holds POS4/1/0
and that your clock source is LINE - give them the circuit ID your seeing
those errors from.

Good luck!
Christian Hunter

On Thu, Aug 11, 2011 at 9:57 AM, Persio Pucci <persio_at_gmail.com> wrote:

> Sure, but I have cleared the counters after the last event, so I believe
> that may not show any current issues... (hostname and IPs were changed to
> protect the innocent)
>
> ROUTER#sh controllers pos 4/1/0
> POS4/1/0
> SECTION
> LOF = 0 LOS = 0 BIP(B1) = 0
> LINE
> AIS = 0 RDI = 0 FEBE = 0 BIP(B2) = 0
> PATH
> AIS = 0 RDI = 0 FEBE = 0 BIP(B3) = 0
> PLM = 0 UNEQ = 0 TIM = 0 TIU = 0
> LOP = 0 NEWPTR = 0 PSE = 0 NSE = 32246
>
> Active Defects: None
> Active Alarms: None
> Alarm reporting enabled for: SF SLOS SLOF B1-TCA B2-TCA PLOP B3-TCA
>
> Framing: SDH
> APS
> working (active)
> COAPS = 0 PSBF = 0
> State: PSBF_state = False
> Rx(K1/K2): 00/00 Tx(K1/K2): 00/00
> Rx Synchronization Status S1 = 0B
> S1S0 = 02, C2 = 16
> Remote aps status (none); Reflected local aps status (none)
> CLOCK RECOVERY
> RDOOL = 0
> State: RDOOL_state = False
> PATH TRACE BUFFER: STABLE
> Remote hostname : REMOTE
> Remote interface: POS2/2/0
> Remote IP addr : X.X.X.X
> Remote Rx(K1/K2): 00/00 Tx(K1/K2): 00/00
>
> BER thresholds: SF = 10e-3 SD = 10e-6
> TCA thresholds: B1 = 10e-6 B2 = 10e-6 B3 = 10e-6
>
> Clock source: line
>
> ROUTER#
>
> On Thu, Aug 11, 2011 at 10:46 AM, Christian Hunter <stasis416_at_gmail.com>wrote:
>
>> Can you post a sh controller pos x/x/x
>> for both of the interfaces on either side?
>>
>>
>>
>>
>> On Thu, Aug 11, 2011 at 9:36 AM, Persio Pucci <persio_at_gmail.com> wrote:
>>
>>> Hi all,
>>>
>>> anybody with good experience with POS/SDH and some spare time? :)
>>>
>>> I am getting some B3 errors on a OC12 circuit I have. The (not) funny
>>> thing
>>> is that when I get the B3 errors, I have input errors and CRC errors
>>> incremented ON BOTH SIDES of the circuit.
>>>
>>> Is this an issue on the SDH transport? Cause I've been researching about
>>> it
>>> and Cisco literature says B3 are path-level errors and most likely to be
>>> caused by some router interface. If it is a router issue, what can I do
>>> to
>>> resolve it?
>>>
>>> Any thoughts?
>>>
>>>
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>>>
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Received on Thu Aug 11 2011 - 10:23:11 ART