Thx all,  it is an interesting one.  I remember Don Slice at Cisco saying
that they were looking into this but never got much further than that.

Personally, I reckon there would be much impact to them developing this to
the DUAL algorithm and this is what the delay in some answers to this
discussion is all about.

Guys, great to hear your views on this. Really interesting stuff.

-----Original Message-----
From: Marty Adkins [mailto:[EMAIL PROTECTED]]
Sent: 13 December 2002 23:19
To: [EMAIL PROTECTED]
Subject: Re: EIGRP Adjacenies are Unidirectional. Why? [7:59186]


"[EMAIL PROTECTED]" wrote:
> 
> As EIGRP only looks at incoming hello packets (EIGRP type 5 packets) to
keep
> a peer neighbor relationship up on a particular side of a routed link.,
this
> can be a prime issue for "black hole" routing issues.
> 
> OSPF adjacencies are bi-directional. Makes more sense.
> 
> Why was EIGRP designed this way?
> 
I don't know why, but I do know Cisco is revisiting that decision.
At Networkers 2002 Alvaro described an enhancement "on the drawing board"
called reliable three-way handshake.  Backward compatible.
See session RST-440.

 Marty Adkins
 Chesapeake NetCraftsmen, LLC
 1290 Bay Dale Drive, Suite 312   http://www.netcraftsmen.NET
 Arnold, MD  21012-2325           Cisco CCIE #1289
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