hwMplsOamIgrDetFreq
1.3.6.1.4.1.2011.5.12.7.1.1.2.1.4
For CV: the frequency is static, per second.
For FFD: the frequency is set by user. The value
can be 10ms, 20ms, 50ms,100ms,200ms,500ms,3ms.
Any other frequency is wrong.
0: 1000ms(only for cv);
1: 10ms;
2: 20ms;
3: 50ms;
4: 100ms;
5: 200ms;
6: 500ms;
7: 3ms.