oltExpiryTime

The minimum amount of time remaining before this entry will be aged out. 
A value of 0 indicates that the entry is only present because igmpCacheSelf
 is true and that if the router left the group, this entry would be aged out
  immediately. Note that some implementations may process membership reports
   from the local system in the same way as reports from other hosts, 
   so a value of 0 is not required.

MIB

NMS-EPON-OLT-MULTICAST-FORWARD

OID

.1.3.6.1.4.1.3320.101.4.1.1.6

Type

column

Access

readonly

Status

mandatory

Parent

nmsEponOltMulticastForwardEntry