This attribute counts the octets received on the Dprs MCS
Switched Path for each discard priority.
This attribute is a vector with four entries. Each vector entry is a
counter indexed by one of four discard priorities, namely, discard
priority 0(dp0), discard priority 1(dp1), discard priority 2(dp2) or
discard priority 3(dp3).
Each entry (counter) wraps around to zero when the maximum
value is reached.