I'm having a problem with NSE/PSE errors on a POS OC12c local loop
in Seattle. The circuit is provisioned between two locations in Seattle
using a Telco network with SONET ADMs. The circuit runs clean except for
the NSE/PSE errors. The near end is seeing PSE errors at a rate of 200/minute
and the remote end is seeing 200 NSE errors a minute.
Completed troubleshooting:
- Hard loops in front of each router (runs clean)
- SONET BERT test (runs clean)
- Replaced router interfaces at both sides
- Groomed fiber and checked light levels (padded where required)
- Both ends are using "clock source line"
- Hard loops at each site in front of the router towards the far end
(to test the full SONET path)
- Near end shows no errors at all
- Far end shows both PSE/NSE errors
We suspect a problem with the Telco circuit, but I have found that
only Cisco routers report NSE/PSE errors. Has anybody found a good way
to troubleshoot this problem and prove its a Telco problem? Its been
suggested that an all-zeros SONET test or watching the stability of the
H1/H2 pointers would highlight the problem.
Cisco troubleshooting documents:
http://www.cisco.com/warp/public/127/POS/posclocking_16181.html
http://www.cisco.com/warp/public/127/nsepse_18932.html
near end config:
interface POS3/0
ip address x.x.x.x 255.255.255.252
no ip directed-broadcast
ip route-cache flow sampled
load-interval 30
crc 32
pos report rdool
pos report lais
pos report lrdi
pos report pais
pos report prdi
pos report sd-ber
pos scramble-atm
no cdp enable
end
seattle#show controllers pos 3/0
POS3/0
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
LOP = 0 NEWPTR = 0 PSE = 214 NSE = 0
Active Defects: None
Active Alarms: None
Alarm reporting enabled for: SF SD SLOS SLOF B1-TCA LAIS LRDI B2-TCA PAIS PLOP PRDI B3-TCA RDOOL
Framing: SONET
APS
COAPS = 0 PSBF = 0
State: PSBF_state = False
ais_shut = FALSE
Rx(K1/K2): 00/00 S1S0 = 00, 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 : somewhere
Remote interface: POS8/0
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
--
=========================================================================
Clinton Work clinton@scripty.com
Calgary, Alberta
in Seattle. The circuit is provisioned between two locations in Seattle
using a Telco network with SONET ADMs. The circuit runs clean except for
the NSE/PSE errors. The near end is seeing PSE errors at a rate of 200/minute
and the remote end is seeing 200 NSE errors a minute.
Completed troubleshooting:
- Hard loops in front of each router (runs clean)
- SONET BERT test (runs clean)
- Replaced router interfaces at both sides
- Groomed fiber and checked light levels (padded where required)
- Both ends are using "clock source line"
- Hard loops at each site in front of the router towards the far end
(to test the full SONET path)
- Near end shows no errors at all
- Far end shows both PSE/NSE errors
We suspect a problem with the Telco circuit, but I have found that
only Cisco routers report NSE/PSE errors. Has anybody found a good way
to troubleshoot this problem and prove its a Telco problem? Its been
suggested that an all-zeros SONET test or watching the stability of the
H1/H2 pointers would highlight the problem.
Cisco troubleshooting documents:
http://www.cisco.com/warp/public/127/POS/posclocking_16181.html
http://www.cisco.com/warp/public/127/nsepse_18932.html
near end config:
interface POS3/0
ip address x.x.x.x 255.255.255.252
no ip directed-broadcast
ip route-cache flow sampled
load-interval 30
crc 32
pos report rdool
pos report lais
pos report lrdi
pos report pais
pos report prdi
pos report sd-ber
pos scramble-atm
no cdp enable
end
seattle#show controllers pos 3/0
POS3/0
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
LOP = 0 NEWPTR = 0 PSE = 214 NSE = 0
Active Defects: None
Active Alarms: None
Alarm reporting enabled for: SF SD SLOS SLOF B1-TCA LAIS LRDI B2-TCA PAIS PLOP PRDI B3-TCA RDOOL
Framing: SONET
APS
COAPS = 0 PSBF = 0
State: PSBF_state = False
ais_shut = FALSE
Rx(K1/K2): 00/00 S1S0 = 00, 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 : somewhere
Remote interface: POS8/0
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
--
=========================================================================
Clinton Work clinton@scripty.com
Calgary, Alberta