1IP (tos 0x30, ttl 48, id 12336, offset 0, flags [none], proto IGMP (2), length 12336, bad cksum 3030 (->69ac)!) 2 48.48.48.48 > 48.48.48.48: igmp dvmrp Prune src 48.48.48.48 grp 48.48.48.48 timer 68y5w3h14m8s 3