EIGRP IPv6 Lab Not Working

[Scott_22]

Hey guys, I'm in the process of obtaining my CCNP and I'm currently working with EIGRP and IPv6. For some reason, I cannot receive EIGRP routes into my routing table even though neighborships have been established. Please review the config below and let me know if you see anything that stands out.

R1:

interface Loopback0
 no ip address
 ipv6 address 2001::2/64
 ipv6 enable
 ipv6 eigrp 100
!

interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
 media-type rj45
 ipv6 enable
 ipv6 eigrp 100
!

ipv6 router eigrp 100
 eigrp router-id 1.1.1.1
 default-metric 1000 100 255 1 1500

R2:

interface Loopback0
 no ip address
 ipv6 address 2001::2/64
 ipv6 enable
 ipv6 eigrp 100
!

interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
 media-type rj45
 ipv6 enable
 ipv6 eigrp 100
!

ipv6 router eigrp 100
 eigrp router-id 2.2.2.2
 default-metric 1000 100 255 1 1500

Routing table:

IPv6 Routing Table - default - 3 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP
       H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
       IS - ISIS summary, D - EIGRP, EX - EIGRP external, NM - NEMO
       ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
       RL - RPL, O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1
       OE2 - OSPF ext 2, ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
       la - LISP alt, lr - LISP site-registrations, ld - LISP dyn-eid
       lA - LISP away, a - Application
C   2001::/64 [0/0]
     via Loopback0, directly connected
L   2001::2/128 [0/0]
     via Loopback0, receive
L   FF00::/8 [0/0]
     via Null0, receive

EIGRP neighbors:

show ipv6 eigrp neighbors
EIGRP-IPv6 Neighbors for AS(100)
H   Address                 Interface              Hold Uptime   SRTT   RTO  Q  Seq
                                                   (sec)         (ms)       Cnt Num
0   Link-local address:     Gi0/0                    11 00:16:34 2000  5000  0  2
    FE80::50A3:62FF:FE45:AA00

[Scott_22]

Hey guys, I'm in the process of obtaining my CCNP and I'm currently working with EIGRP and IPv6. For some reason, I cannot receive EIGRP routes into my routing table even though neighborships have been established. Please review the config below and let me know if you see anything that stands out.

R1:

interface Loopback0
 no ip address
 ipv6 address 2001::2/64
 ipv6 enable
 ipv6 eigrp 100
!

interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
 media-type rj45
 ipv6 enable
 ipv6 eigrp 100
!

ipv6 router eigrp 100
 eigrp router-id 1.1.1.1
 default-metric 1000 100 255 1 1500

R2:

interface Loopback0
 no ip address
 ipv6 address 2001::2/64
 ipv6 enable
 ipv6 eigrp 100
!

interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
 media-type rj45
 ipv6 enable
 ipv6 eigrp 100
!

ipv6 router eigrp 100
 eigrp router-id 2.2.2.2
 default-metric 1000 100 255 1 1500

Routing table:

IPv6 Routing Table - default - 3 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP
       H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
       IS - ISIS summary, D - EIGRP, EX - EIGRP external, NM - NEMO
       ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
       RL - RPL, O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1
       OE2 - OSPF ext 2, ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
       la - LISP alt, lr - LISP site-registrations, ld - LISP dyn-eid
       lA - LISP away, a - Application
C   2001::/64 [0/0]
     via Loopback0, directly connected
L   2001::2/128 [0/0]
     via Loopback0, receive
L   FF00::/8 [0/0]
     via Null0, receive

EIGRP neighbors:

show ipv6 eigrp neighbors
EIGRP-IPv6 Neighbors for AS(100)
H   Address                 Interface              Hold Uptime   SRTT   RTO  Q  Seq
                                                   (sec)         (ms)       Cnt Num
0   Link-local address:     Gi0/0                    11 00:16:34 2000  5000  0  2
    FE80::50A3:62FF:FE45:AA00

[balaji.bandi]

Where is your L3 reachability IP between  R1 and R2 routers.

The config you have provided not have that information until you have any other mode of connectivity.

please refer below example :

https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/113267-eigrp-ipv6-00.html

BB

[kka]

Did you expect the prefix from the other routers Loopback IF announced per EIGRP? It is announced but since you configured the IPs for both routers from the same /64 prefix it's not accepted in the route table because the locally connected prefix has a lower AD.

Best practice for IPv6 Loopback IF: /128

BTW, please avoid using official global unicast addresses as example for your posts (unless related to that provider), better use the IANA reserved documentation prefix: 2001:db8::/32

[Julio E. Moisa]

Hi Scott,

you are using the same IPv6 address over the loopback on both routers, they must be different. 

[johnlloyd_13]

hi,

aside from what others have suggested, did you enable ipv6 unicast-routing and configure a WAN IPv6 address?

kindly post a show run output on both R1 and R2.