Cisco Asr 1000 Series Aggregation Services Routers Sip And Spa Software Configuration Guide, Cisco Ios - Cisco ASR 1000 Series Software Configuration Manual

Troubleshooting the Serial SPAs
Input Error Type(Field Name)
Framing errors (frame)
OL-14127-17
Possible Problem
A framing error occurs when a
packet does not end on an 8-bit
byte boundary for one of the
following reasons:
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Serial Lines: Troubleshooting Serial Line Input Errors
• The serial line is noisy.
• The cable is improperly
designed, the serial cable is
too long, or the cable from
the CSU or DSU to the router
is not shielded.
• SCTE mode is not enabled
on the DSU, the CSU line
clock is incorrectly
configured, or one of the
clocks is configured for local
clocking.
• A ones density problem has
occurred on the T1 link
(incorrect framing or coding
specification).
Solution
1 Ensure that the line is clean
enough for transmission
requirements. Shield the cable,
if necessary. Make certain that
you are using the correct cable.
2 Make sure that the cable is
within the recommended length
(no more than 50 feet [15.24
meters], or 25 feet [7.62
meters] for a T1 link).
3 Ensure that all devices are
properly configured to use a
common line clock. Set SCTE
on the local and remote DSU.
4 Make certain that the local and
remote CSU/DSU are
configured for the same
framing and coding scheme as
that used by the leased-line or
other carrier service (for
example, ESF/B8ZS).
5 Contact your leased-line or
other carrier service, and have
it perform integrity tests on the
line.
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