Re: [OSPF] Immediate Replying Hello

<rui.valadas@tecnico.ulisboa.pt> Wed, 31 January 2018 13:43 UTC

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From: rui.valadas@tecnico.ulisboa.pt
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Subject: Re: [OSPF] Immediate Replying Hello
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Hi,

 

It helps, thanks.

 

But the Kou draft (https://datatracker.ietf.org/doc/draft-kou-ospf-immediately-replying-hello/ ) also mentions two other situations where immediate hellos must be sent: after state changes from “2-Way” or greater down to “Init” (case 2), and after DR election (case 3). Do you know if these cases are also implemented?

 

Thanks.

 

Rui

 

From: Acee Lindem (acee) [mailto:acee@cisco.com] 
Sent: Wednesday, January 31, 2018 12:47 PM
To: rui.valadas@tecnico.ulisboa.pt; ospf@ietf.org
Subject: Re: [OSPF] Immediate Replying Hello

 

Hi Rui, 

 

It is not a standard. However, it is a technique used by many implementations to speed adjacency formation when a hello packet is received and the neighbor state is less than two-way. At least one of the implementations with witch with I have been associated would unicast the hello. 

 

Hope this helps, 

Acee 

 

From: OSPF <ospf-bounces@ietf.org <mailto:ospf-bounces@ietf.org> > on behalf of "rui.valadas@tecnico.ulisboa.pt <mailto:rui.valadas@tecnico.ulisboa.pt> " <rui.valadas@tecnico.ulisboa.pt <mailto:rui.valadas@tecnico.ulisboa.pt> >
Date: Wednesday, January 31, 2018 at 3:28 AM
To: OSPF WG List <ospf@ietf.org <mailto:ospf@ietf.org> >
Subject: [OSPF] Immediate Replying Hello

 

Hi,

 

Many OSPF implementations include the Immediate Replying Hello feature, which I believe is not standard.

 

The only reference I found is the draft “Update to OSPF Hello procedure, draft-kou-ospf-immediately-replying-hello-02.txt” which has expired.

 

Are vendors following what is written in this draft? Is there a document from any vendor that details this feature? 

 

Thanks.

 

Rui Valadas