The following table provides information about some additional BERT patterns supported by some of the
channelized SPAs on the Cisco ASR 1000 Series Aggregation Services Routers:
Table 33: Additional BERT Pattern Support on the Channelized SPAs
2-Port and 4-Port Channelized
T3 SPA
1-Port Channelized
OC-12/STM-4 SPA
1-Port Channelized OC-3/STM-1
SPA
Pattern
Yes
Yes
Yes
1-in-8
Yes
Yes
Yes
3-in-24
Yes
Yes
Yes
2^9
Yes
Yes
Yes
2^11
Yes
Yes
Yes
2^15-inverted
Yes
Yes
Yes
2^20-QRSS
Yes
Yes
Yes
2^23-inverted
Yes
No
Yes
55Octet
Yes
No
Yes
55Daly
Yes
No
Yes
DS0-1, DS0-2, DS0-3, and
DS0-4
No
Yes
No
Single Bit Error Injection
Both the total number of error bits received and the total number of bits received are available for analysis.
You can set the testing period from 1 minute to 14,400 minutes (240 hours), and you can also retrieve the
error statistics anytime during the BER test.
When running a BER test, your system expects to receive the same pattern that it is transmitting. To help
ensure this:
•
Use a loopback at a location of your choice in the link or network. To see how to configure a loopback,
go to the
Using loopback Commands, on page 341
.
•
Configure remote testing equipment to transmit the same BER test pattern at the same time.
Configuring a BER Test
To send a BER test pattern on an interface, use the
bert pattern
command. For more information, see the
Configuring the 1-Port Channelized OC-3/STM-1 SPA and 1-Port Channelized OC-12/STM-4 SPA
chapter.
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Everest 16.5
OL-14127-17
339
Troubleshooting the Serial SPAs
Configuring a BER Test