EIGRP Neighborship Initial Update

[Menachem E]

Hi, from what I've observed, every time EIGRP establishes a neighborship, the initial update containing the prefixes sent by the router that sent the first INIT isn't acknowledged by the neighbor. Instead, it's always resent using unicast, and only then does it get acknowledged. I'm curious if anyone has insights into why this occurs?

[Menachem E]

EIGRP-IPv4 VR(E) Address-Family Neighbors for AS(1)
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 10.0.12.1 Gi0/0 14 00:00:24 1 100 0 78
Version 23.0/2.0, Retrans: 0, Retries: 0, Prefixes: 3
Topology-ids from peer - 0
Topologies advertised to peer: base

Max Nbrs: 0, Current Nbrs: 0

[Menachem E · Accepted solution]

Looks like Peter says here "flaw in implementation"

https://community.cisco.com/t5/routing/eigrp-startup-process-unicast-and-multicast-updates-containing/td-p/2782761

[David Ruess]

If anyone knows it would be him!

[Menachem E]

Yup. Thanks for the help.