- An IPv6 packet wants to walk into a bar, but can't cross the street to get there.
- An STP packet closes the bar so the bar next door can continue to operate.
- A VRRP packet gets confused about which bar it is in. Then it sets both bars on fire. Nobody knows why.
- A BGP packet gives you a list of every bar in the world, everywhere. China crosses 25% of them off the list.
- A multicast packet bar hops.
- A forlorn BootP packet sits in a corner crying into its beer. Nearby, a DHCP packet is the center of attention.
- An SCTP packet is stopped at the doorway and sent away.
- An anycast packet doesn't really care which bar its in.
- The LLC/SNAP packet has such a funny accent the bartender doesn't understand it.
- An LACP packet comes in through the window, just checking that all of the paths work.
- A large group of ARP packets storm in and make a general nuisance of themselves.
- The bar hasn't been allowed to segregate customers by VLAN since the 1960s.
- An IP fragment walks into the bar. The bartender makes it wait to be seated until the rest of its party arrives.
- A kerberos packet walks into the bar, but is confused by the clock being 6 minutes fast. The NTP packet hands it a drink, and all is well.
- An SFlow packet gossips with the bartender about all of the other packets.
- The rest of the packets look pityingly at the old IPX packet.
- The strict source routed packet tries to get to the bar but ends up at the dry cleaners instead.
- The GRE packet carries another packet into the bar, sets it on the barstool, orders it a drink, and goes back to help another.
- The TTL=1 packet barely makes it to the bar.
- The IP Options packet arrives late. It had to take the slowpath.
I suspect many of these will only be funny to about 3 people in the world. If you are not one of them, my deepest apologies.