To stay updated what’s happening in the network industry it doesn’t hurt to read some RFCs and IETF drafts. Here are two I recommend that you read. A comparison of IPv6 tunneling mechanisms- draft-steffann-tunnels-00 It describes different ways of tunneling
EIGRP draft released
Donnie Savage, Russ White, Don Slice, J. NG and Steven Moore all from Cisco have published the IETF draft for EIGRP. You can find it here. Why would you want to read this draft? If you are a CCIE candidate