3.12 Configure, verify, and troubleshoot EIGRP for IPv6 (excluding authentication, filtering, manual summarization, redistribution, stub)

Begin with this topology:

Screenshot_2018-04-21_16-59-57

First enable IPv6 routing, configure a router id (optional) and enable the EIGRP process:

Router(config)#ipv6 unicast-routing 
Router(config)#ipv6 router eigrp 1
Router(config-rtr)#eigrp router-id 1.1.1.1
Router(config-rtr)#no shutdown

 

Next configure EIGRP on each interface:

Router(config)#int g0/0
Router(config-if)#ipv6 address 2001:db8:0:0::/64 eui-64 
Router(config-if)#ipv6 eigrp 1
Router(config-if)#no shutdown

The show commands are similar but use “ipv6” instead:

Router#show ipv6 int brief
Ethernet0/0 [administratively down/down]
 unassigned
GigabitEthernet0/0 [up/up]
 FE80::C801:17FF:FE26:8
 2001:DB8::C801:17FF:FE26:8
GigabitEthernet1/0 [up/up]
 FE80::C801:17FF:FE26:1C
 2001:DB8:0:3:C801:17FF:FE26:1C
GigabitEthernet2/0 [administratively down/down]
 unassigned
GigabitEthernet3/0 [administratively down/down]
 unassigned
Router#show ipv6 eigrp 1 interfaces 
IPv6-EIGRP interfaces for process 1
 Xmit Queue Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Gi0/0 1 0/0 657 0/1 3272 0
Gi1/0 1 0/0 1029 0/1 6396 0
Router#show ipv6 eigrp 1 nhe 
Router#show ipv6 eigrp 1 ne 
Router#show ipv6 eigrp 1 neighbors 
IPv6-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
 (sec) (ms) Cnt Num
1 Link-local address: Gi1/0 14 00:00:18 1029 5000 0 9
 FE80::C803:17FF:FE44:1C
0 Link-local address: Gi0/0 11 00:11:30 657 3942 0 10
 FE80::C802:17FF:FE35:8
Router#show ipv6 eigrp 1 topo 
Router#show ipv6 eigrp 1 topology 
IPv6-EIGRP Topology Table for AS(1)/ID(1.1.1.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
 r - reply Status, s - sia Status

P 2001:DB8:0:1::/64, 2 successors, FD is 3072
 via FE80::C802:17FF:FE35:8 (3072/2816), GigabitEthernet0/0
 via FE80::C803:17FF:FE44:1C (3072/2816), GigabitEthernet1/0
P 2001:DB8::/64, 1 successors, FD is 2816
 via Connected, GigabitEthernet0/0
P 2001:DB8:0:3::/64, 1 successors, FD is 2816
 via Connected, GigabitEthernet1/0
Router#show ipv6 eigrp 1 ?
 interfaces EIGRP interfaces
 neighbors EIGRP neighbors
 topology EIGRP Topology Table
 traffic EIGRP Traffic Statistics

Router#show ipv6 route
IPv6 Routing Table - Default - 6 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
 B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP
 I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
 D - EIGRP, EX - EIGRP external
 O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
 ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
C 2001:DB8::/64 [0/0]
 via GigabitEthernet0/0, directly connected
L 2001:DB8::C801:17FF:FE26:8/128 [0/0]
 via GigabitEthernet0/0, receive
D 2001:DB8:0:1::/64 [90/3072]
 via FE80::C802:17FF:FE35:8, GigabitEthernet0/0
 via FE80::C803:17FF:FE44:1C, GigabitEthernet1/0
C 2001:DB8:0:3::/64 [0/0]
 via GigabitEthernet1/0, directly connected
L 2001:DB8:0:3:C801:17FF:FE26:1C/128 [0/0]
 via GigabitEthernet1/0, receive
L FF00::/8 [0/0]
 via Null0, receive
Router#

Use similar debug commands to diagnose issues with EIGRP for IPv6:

Router#debug ipv6 eigrp 
IP-EIGRP Route Events debugging is on
Router#
*Apr 21 17:42:10.127: IPv6-EIGRP(0:1): Processing incoming UPDATE packet
*Apr 21 17:42:10.859: IPv6-EIGRP(0:1): Processing incoming UPDATE packet
*Apr 21 17:42:10.859: IPv6-EIGRP(0:1): Int 2001:DB8:0:1::/64 M 3072 - 2560 512 SM 2816 - 2560 256
*Apr 21 17:42:10.859: IPv6-EIGRP(0:1): 2001:DB8:0:1::/64 (90/3072) added to RIB
*Apr 21 17:42:10.859: IPv6-EIGRP(0:1): 2001:DB8:0:1::/64 (90/3072) added to RIB
*Apr 21 17:42:10.859: IPv6-EIGRP(0:1): Int 2001:DB8:0:3::/64 M 3072 - 2560 512 SM 2816 - 2560 256
*Apr 21 17:42:10.859: IPv6-EIGRP(0:1): 2001:DB8:0:3::/64 routing table not updated
*Apr 21 17:42:10.859: IPv6-EIGRP(0:1): Int 2001:DB8::/64 M 3328 - 2560 768 SM 3072 - 2560 512
*Apr 21 17:42:10.859: IPv6-EIGRP(0:1): 2001:DB8::/64 routing table not updated
*Apr 21 17:42:10.859: IPv6-EIGRP(0:1): 2001:DB8::/64 routing table not updated
*Apr 21 17:42:10.871: IPv6-EIGRP(0:1): 2001:DB8::/64 - do advertise out GigabitEthernet1/0
*Apr 21 17:42:10.871: IPv6-EIGRP(0:1): Int 2001:DB8::/64 metric 2816 - 2560 256
*Apr 21 17:42:10.871: IPv6-EIGRP(0:1): 2001:DB8:0:3::/64 - do advertise out GigabitEthernet1/0
*Apr 21 17:42:10.871: IPv6-EIGRP(0:1): Int 2001:DB8:0:3::/64 metric 2816 - 2560 256
*Apr 21 17:42:10.875: IPv6-EIGRP(0:1): Int 2001:DB8:0:1::/64 metric 3072 - 2560 512
*Apr 21 17:42:10.879: IPv6-EIGRP(0:1): Processing incoming UPDATE packet
*Apr 21 17:42:10.879: IPv6-EIGRP(0:1): Int 2001:DB8:0:1::/64 M 3072 - 2560 512 SM 2816 - 2560 256
*Apr 21 17:42:10.879: IPv6-EIGRP(0:1): Int 2001:DB8:0:3::/64 M 3072 - 2560 512 SM 2816 - 2560 256
*Apr 21 17:42:10.879: IPv6-EIGRP(0:1): Int 2001:DB8::/64 M 3328 - 2560 768 SM 3072 - 2560 512
*Apr 21 17:42:10.891: IPv6-EIGRP(0:1): Processing incoming UPDATE packet
*Apr 21 17:42:10.891: IPv6-EIGRP(0:1): Int 2001:DB8::/64 M 4294967295 - 2560 4294967295 SM 4294967295 - 2560 4294967295
*Apr 21 17:42:10.891: IPv6-EIGRP(0:1): 2001:DB8::/64 routing table not updated
*Apr 21 17:42:10.899: IPv6-EIGRP(0:1): Int 2001:DB8:0:1::/64 metric 3072 - 2560 512
*Apr 21 17:42:10.975: IPv6-EIGRP(0:1): 2001:DB8::/64 - do advertise out GigabitEthernet1/0
*Apr 21 17:42:10.975: IPv6-EIGRP(0:1): Int 2001:DB8::/64 metric 2816 - 2560 256
*Apr 21 17:42:10.975: IPv6-EIGRP(0:1): 2001:DB8:0:3::/64 - do advertise out GigabitEthernet1/0
*Apr 21 17:42:10.979: IPv6-EIGRP(0:1): Int 2001:DB8:0:3::/64 metric 2816 - 2560 256

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