This reports the IGMP Time To Live value associated with a given multicast group's traffic. A TTL here that is unexpectedly low for the intended distribution scope can explain multicast traffic that mysteriously fails to reach a remote site, since TTL decrements at each hop and traffic is dropped once it reaches zero, so insufficient TTL set at the source will cause the stream to die out before crossing the satellite hop. A group showing a TTL of only 1 would very likely fail to survive being routed across the satellite link to a remote site, since the hop itself would decrement it to 0.