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router-id for ipv6 eigrp question

Based on Cisco ducumentation, an EIGRP for IPv6 protocol instance requires a router ID before it can start running.

But when I tested this, ipv6 eigrp runs without router-id configured.

R1

 

 

ipv6 unicast-routing

interface Loopback0
 ip address 1.1.1.1 255.255.255.255
 ipv6 address 2001:1111::1/64
 ipv6 enable
 ipv6 eigrp 10
!
interface Ethernet0/0
 no ip address
 ipv6 address 2001:1212::1/64
 ipv6 enable
 ipv6 eigrp 10

ipv6 router eigrp 10

R2

ipv6 unicast-routing

interface Loopback0
 ip address 2.2.2.2 255.255.255.255
!
interface Ethernet0/0
 no ip address
 ipv6 address 2001:1212::2/64
 ipv6 enable
 ipv6 eigrp 10
ipv6 router eigrp 10

ipv6 router eigrp 10

R2(config)#do show ipv6 eigrp nei
EIGRP-IPv6 Neighbors for AS(10)
H   Address                 Interface              Hold Uptime   SRTT   RTO  Q  Seq
                                                   (sec)         (ms)       Cnt Num
0   Link-local address:     Et0/0                    14 00:27:29    4   100  0  2
    FE80::A8BB:CCFF:FE00:A00

R2(config)#do show ipv6 route eigrp
IPv6 Routing Table - default - 4 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
       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, l - LISP
D   2001:1111::/64 [90/409600]
     via FE80::A8BB:CCFF:FE00:A00, Ethernet0/0

Do I miss anything ?

 

thanks !!

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