Cisco ASR 1000 Configuration Guide

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Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
OL-14127-08
Chapter 20 Troubleshooting the Serial SPAs
Performing Basic Interface Troubleshooting
Framing errors
(frame)
A framing error occurs when a
packet does not end on an 8-bit
byte boundary for one of the
following reasons:
• 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).
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.
Table 20-5 Serial Lines: Troubleshooting Serial Line Input Errors (continued)
Input Error Type
(Field Name) Possible Problem Solution

Cisco ASR 1000 Specifications

General

Operating System	Cisco IOS XE
Interfaces	10 Gigabit Ethernet
Power Supply	AC or DC
Number of Total Expansion Slots	Varies by model
Management Port	Console
Redundant Power Supply Supported	Yes
Width	17.5 inches
Memory	Varies by model
Storage	Varies by model
Dimensions (H x W x D)	Varies by model
Weight	Varies by model
Operating Temperature	32°F to 104°F (0°C to 40°C)
Humidity	5% to 95% non-condensing
MTBF	Varies by model
Redundancy	Redundant power supplies, fans, and route processors (depending on model)