Enhanced OISM exception policy to avoid multicast traffic loss on packets with TTL=1

Enhanced optimized intersubnet multicast (OISM) routes most multicast traffic on the OISM supplemental bridge domain (SBD) rather than on the source VLAN, even if the destination OISM device hosts the source VLAN. This extra routing decrements a packet?s time-to-live (TTL) more than once, so packets with TTL=1 don't reach the receivers. To avoid this problem on enhanced OISM devices, you can configure the devices to use the source VLAN instead of the SBD to forward multicast data to remote receivers.