Though the input packet error rate on our 7500 POS interface
(PA-POS-2OC3 on VIP6-80) is not very high (between 1 in 50000 /
1 in 250000 packets), it used to be zero until a few
Then, input errors appeared but in a non-linear way:
as long as the input rate does not exceed 40 Mbps
we are hardly seeing any input erros, but then
the input error rate suddenly increases --
in other words, we see a non-linear behavior of the
input (packet) errors versus received packets.
As to the type of input errors: we don't see CRC
or framing errors so to me looks it's not related
to the SDH network. There's quite a few "abort"
errors (less than 50%) and the rest of the errors
are not identified.
We have similarly configured 7200s/7500s at the other
side of the STM-1 circuit.
Any ideas about the cause or further troubleshooting?
We can open a TAC case but I wonder if 1 in 50000
is high enough an error rate to really wonder.