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
YesYesYes1-in-8
YesYesYes3-in-24
YesYesYes2^9
YesYesYes2^11
YesYesYes2^15-inverted
YesYesYes2^20-QRSS
YesYesYes2^23-inverted
YesNoYes55Octet
YesNoYes55Daly
YesNoYesDS0-1, DS0-2, DS0-3, and
DS0-4
NoYesNoSingle 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
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