First, simple theoretical knowledge:
EIGRP is a support for their own IP, IPX, Appletalk and other network routing protocols, based on a large number of EIGRP deployment, resulted in the expansion of TLV to allow EIGRP to support the idea of IPv6. (IOS 12.4 (6) T has begun to support EIGRPv6)
EIGRP to achieve IPv6 only need to define a new module to the agreement. It is the introduction of IPv6 protocol stack, protocol identifier is still 88. At the same time, an increase of 3 TLV,
IPv6_Request_type
IPv6_Metric_type
IPv6_Exterior_type
EIGRP for IPv4 but the same, use the same 32-bit RouterID, use the same method for calculating the Metric at the same time we can only support MD5 encryption-based authentication method, and OSPFv3 can use IPSec, IPSec authentication is not available in EIGRPv6. However, Cisco will support future versions of the IPSec authentication method.
EIGRP also EIGRPv6 and there are many different points, first of all, it uses link address as the source of the Hello message address, destination address for the multicast address FF02:: A. So that all the neighbors do not need the prefix to create the same neighborhood. At the same time, auto-aggregation in the IPv6 environment, the default is turned off. IPv6 mode as a result of a single link to support multiple address prefixes, so the level of partition does not support IPv6.

Second, EIGRPv6 basic configuration
First of all, in the overall model, open the ipv6 unicast forwarding
Router (config) # ipv6 unicast-routing
Since then Cisco may open the fast forwarding,
Router (config) # ipv6 cef
EIGRPv6 open manner and OSPFv3 process similar configuration in the interface will be an interface into the EIGRP autonomous system can be, but need to pay attention to is that after opening, regardless of interface state is Down or up, both need to use the No Shutdown command to activate the process of EIGRPv6.
Router (config-if) # ipv6 eigrp as-number
Router (config-if) # no shutdown
Router-ID of the option and EIGRPv4 the same, but when there is no router ip address 32 exists, the process can not be formulated because the Router-ID, will result in failure to start, at this time can EIGRPv6 process, the manual settings Router - ID.
ipv6 router eigrp as-number
router-id (ip-address | ipv6-address)
no shutdown
See EIGRP information is as follows:
Router1 # show ipv6 protocol

Third, EIGRP authentication

EIGRPv6 only supports MD5 authentication
First need to define a Key-Chain
key chain kaka
key 1
key-string mike
accept-lifetime 16:30:00 Nov 28 2004 duration 43200 (continued 43,200 seconds)
send-lifetime 16:30:00 Nov 28 2004 duration 43200
key 2
key-string mmike
accept-lifetime 04:00:00 Nov 29 2004 13:00:00 Apr 15 2005 (due time)
send-lifetime 04:00:00 Nov 29 2004 13:00:00 Apr 15 2005
key 3
key-string mmmike
accept-lifetime 12:30:00 Apr 15 2005 infinite (forever)
send-lifetime 12:30:00 Apr 15 2005 infinite
From one key to another key to the migration (the key to its inspection from low to high), the system allows time 30min overlap in
Between different systems is always correct
Since then the need to activate the interface MD5 authentication method
ipv6 authentication mode eigrp as-number md5
If the command is not implemented, will not link the use of certification
Key-chain and then articulated the need for certification of the interface
ipv6 authentication key-chain eigrp as-number key-chain

EIGRPv6 parameter adjustment
EIGRPv6 and EIGRP is similar to the link bandwidth can also be defined occupation, the default is 50% occupied
ipv6 bandwidth-percent eigrp as-number percent number
EIGRPv6 configuration of the Hello interval i
ipv6 hello-interval eigrp as-number seconds
Configuration of the Hold timer EIGRPv6
ipv6 hold-time eigrp as-number seconds
Close EIGRPv6 the level of segmentation
no ipv6 split-horizon eigrp as-number

Adjustment EIGRPv6 Metric
EIGRPv6 measurement methods and EIGRPv4 identical configuration similar to:
ipv6 router eigrp as-number
metric weights tos k1 k2 k3 k4 k5

EIGRPv6 Stub model
SIA in order to prevent the emergence of the state, EIGRPv6 model can also be configured Stub
ipv6 router eigrp as-number
stub [receive-only | connected | static | summary | redistributed]

Monitoring EIGRPv6
Can log information to monitor changes in EIGRPv6 neighbors and neighbors notice
ipv6 router eigrp as-number
log-neighbor-changes
log-neighbor-warnings [seconds]

Debug EIGRPv6
debug eigrp fsm
debug eigrp neighbor [siatimer] [static]
debug eigrp packet
debug eigrp transmit [ack] [build] [detail] [link] [packetize] [peerdown] [sia] [startup] [strange]
debug ipv6 eigrp [as-number] [neighbor ipv6-address | notification | summary]