AURP
Initially designed by Apple Inc. to connect Macintosh computers to
printers and file servers in small workgroups, the AppleTalk protocol
was later deployed in larger LAN and WAN configurations. While TCP/IP
has become the prominent customer choice of protocols, Cisco kept the
AppleTalk protocol on its Cisco IOS Software to satisfy the demand in
some niche markets such as education and scientific communities.
Due to a significant decrease in Appletalk usage and demand among its
customer base, and given the fact that Apple now fully supports the
TCP/IP family of protocols, Cisco has reached the decision to
discontinue AppleTalk support on Cisco IOS.
The AppleTalk feature removal will be permanent and will also apply to
any future IOS releases after 12.4(24)T. This removal will also
propagate to other IOS release trains in future (updated product
bulletins will be released for other trains).
Features
The following features will be removed from Cisco IOS Software after Release 12.4(24)T:
• AppleTalk Phase 1 and Phase 2 support
• AppleTalk Update-Based Routing Protocol (AURP)
• AppleTalk Tunneling
• AppleTalk Remote Access Protocol (ARAP)
• AppleTalk Access Lists
• All other AppleTalk related features
Cayman Tunneling
Designed by Cayman Systems, Cayman tunneling enables tunneling to
enable Cisco routers to interoperate with Cayman GatorBoxes. With
Cayman tunneling, you can establish tunnels between two routers or
between a Cisco router and a GatorBox. When using Cayman tunneling,
you must not configure the tunnel with an AppleTalk network address.
DVMRP
Use DVMRP when a router connects to an mrouted (multicast) router to
run DVMRP over a tunnel. You must configure Protocol Independent
Multicast (PIM) and an IP address on a DVMRP tunnel.
EON - CLNS
The ISO Connectionless Network Service (CLNS) protocol is a standard
for the network layer of the OSI model. IP traffic can be transported
over CLNS; for instance, on the data communications channel (DCC) of a
SONET ring. An IP over CLNS tunnel (CTunnel) is a virtual interface
that enhances interactions with CLNS networks, allowing IP packets to
be tunneled through the Connectionless Network Protocol (CLNP) to
preserve TCP/IP services. CLNS can also be used as a transport
protocol with GRE as a carrier protocol (GRE/CLNS), carrying both IPv4
and IPv6 packets.
GRE
Generic routing encapsulation (GRE) is defined in RFC 2784. GRE is a
carrier protocol that can be used with a variety of underlying
transport protocols, and GRE can carry a variety of passenger
protocols. RFC 2784 also covers the use of GRE with IPv4 as the
transport protocol and the passenger protocol. Cisco IOS software
supports GRE as the carrier protocol with many combinations of
passenger and transport protocols.
IPIP
Use the ipip keyword to specify that IP-in-IP encapsulation will be
used. The optional decapsulate-any keyword terminates any number of
IP-in-IP tunnels at one tunnel interface. Note that this tunnel will
not carry any outbound traffic; however, any number of remote tunnel
endpoints can use a tunnel configured this way as their destination.
IPTALK
IPTalk is a protocol for encapsulating AppleTalk packets in IP
datagrams. IPTalk is used to route AppleTalk packets across
non-AppleTalk backbones and to communicate with applications on hosts
that cannot otherwise communicate via AppleTalk, such as the Columbia
AppleTalk Package (CAP). IPTalk also allows serial connections to use
IPTalk Serial Line Internet Protocol (SLIP) drivers.
IPV6IP
Use the ipv6ip keyword to specify that IPv6 will be used as the
passenger protocol and IPv4 as both the carrier (encapsulation) and
transport protocol. When additional keywords are not used, manual IPv6
tunnels are configured. Additional keywords can be used to specify
IPv4-compatible, 6to4, or ISATAP tunnels.
NOS
The nos command is used to establish an nos style tunnel, (also known
as ka9q or IP-IP tunnel).
Yes it is absolutely possible to make an IPsec tunnel with MAP's and access lists, that supports IPv6. Link to complete guide:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_conn_vpnips/configuration/xe-3s/sec-sec-for-vpns-w-ipsec-xe-3s-book/sec-ipv6-ipv4-gre.html
I'm not sure on the last question. But i think it must be possible. I don't have equiptment available to check the commands available myself. You've not stated what kind of equipment you are using.
