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Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
OL-14127-08
Chapter 19 Configuring the 1-Port Channelized OC-3/STM-1 SPA and 1-Port Channelized OC-12/STM-4 SPA
Configuration Tasks
The BERT operation is data-intensive. Regular data cannot flow on the path while the test is in progress.
The path is reported to be in alarm state when BERT is in progress and restored to a normal state after
BERT has been terminated.
BERT Test Configuration Guidelines
When configuring BERT on the 1-Port Channelized OC-3/STM-1 SPA or 1-Port Channelized
OC-12/STM-4 SPA, consider the following guidelines:
• Only DS1/T1 and DS3/T3 paths are supported on the 1-Port Channelized OC-12/STM-4 SPA.
• A maximum of 27 concurrent tests across all paths on the SPA is supported.
BERT Pattern Descriptions
Table 19-1 and Table 19-2 describe the supported BERT patterns on the 1-Port Channelized
OC-3/STM-1 SPA and 1-Port Channelized OC-12/STM-4 SPA.
Ta b l e 19-1 DS1/T1/E1 BERT Patterns
Pattern Description
0s All 0’s in the test pattern (...000...).
1-in-8 8-bit test pattern where 1 out of 8 bits is set to 1.
1s All 1’s in the test pattern (...111...).
2^11 Pseudorandom 1 test pattern that is 2,048 bits in length.
2^15 Pseudorandom 1 O.151 test pattern that is 32,768 bits in length.
2^15-inverted Pseudorandom 1 inverted O.151 test pattern that is 32,768 bits in length.
2^20-O153 Pseudorandom 1 O.153 test pattern that is 1,048,575 bits in length.
2^20-QRSS Pseudorandom 1 quasi-random signal sequence (QRSS) 0.153 test pattern that is
1,048,575 bits in length.
2^23 Pseudorandom 1 O.151 test pattern that is 8,388,607 bits in length.
2^23-inverted Pseudorandom 1 inverted O.151 test pattern that is 8,388,607 bits in length.
2^9 Pseudorandom 1 O.150 test pattern that is 511 bits in length.
3-in-24 24-bit test pattern where 3 out of 24 bits is set to 1.
alt-0-1 Repeating test pattern of alternating 0’s and 1’s (...01010...).
Ta b l e 19-2 DS3/T3/E3 BERT Patterns
Pattern Description
0s All 0’s in the test pattern (...000...).
1s All 1’s in the test pattern (...111...).
2^15 Pseudorandom 1 O.151 test pattern that is 32,768 bits in length.
2^20 Pseudorandom 1 O.153 test pattern that is 1,048,575 bits in length.
2^23 Pseudorandom 1 O.151 test pattern that is 8,388,607 bits in length.
alt-0-1 Repeating test pattern of alternating 0’s and 1’s (...01010...).
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