How to understand Lofs,Loss,Lols,Lprs,ES

[theseus]

hi all,

In the course of testing performance management of DSLAM, I need to simulate some events to

increase MIB counters, such as adslAtucPerfCurr15MinLofs,adslAtucPerfCurr15MinLols,etc, so

these counters can reach the threshold, trap info can be gotten. But I am confused with

definition of Lofs,Loss,Lols,Lprs,ES and other channel performance data.

1.The definition of adslAtucPerfCurr15MinLofs is "Count of seconds in the current 15-minute

interval when there was Loss of Framing.", it is same for Loss,Lols,Lprs. I don't understand

these definitions well, how can I control the happen of these events, the tools I have are

Line simulator,SmartBits (from spirent);

2.The definition of AtucChanPerfCurr15MinRxBlks is "Count of all encoded blocks received on

this

channel, within the current 15-minute interval.", what's the meaning of encoded blocks? The

definition of AtucChanPerfCurr15MinCorrectedBlks is "Count of all encoded blocks received

with corrected errors on this channel, within the current 15-minute interval.", how to judge

the encoded blocks have errors or not, checksum? or CRC?

Thanks in advance

Best Regards

[thomas.chen]

The Cisco management framework is consistent with the Telecommunication Management Network (TMN). Like TMN, Cisco uses a five-layer model that defines both the logical division and the communication between areas of the service provider's business operations and management processes. Consistent with this architecture, Cisco has developed a suite of service, network, and element management solutions.

http://www.cisco.com/en/US/products/hw/switches/ps1925/products_technical_reference_chapter09186a00800e9791.html