Configure the ATM 1 and ATM 2 OAM F5 Loopback Cell Threshold

For ATM 1 and ATM 2 interfaces with an ATM encapsulation, you can configure the OAM F5 loopback cell threshold on VCs. This is the minimum number of consecutive OAM F5 loopback cells received before a VC is declared up, or the minimum number of consecutive OAM F5 loopback cells lost before a VC is declared down.

By default, when five consecutive OAM F5 loopback cells are received, the VC is considered to be up, and when five consecutive cells are lost, the VC is considered to be down. To
modify these values on a point-to-point interface, include the oam-liveness statement at the [edit interfaces interface-name unit logical-unit-number] hierarchy level:

[edit interfaces interface-name unit logical-unit-number] 

oam-liveness { 

    up-count cells;

    down-count cells;

}

To modify the OAM F5 loopback cell count threshold on a virtual circuit that is part of a point-to-multipoint interface, include the oam-liveness statement at the [edit interfaces interface-name unit logical-unit-number family family address address multipoint-destination destination-address] hierarchy level:

[edit interfaces interface-name unit logical-unit-number family family address address 
multipoint-destination destination-address] 

oam-liveness { 

    up-count cells;

    down-count cells;

}

The cell count can be a value from 1 through 255.