Re: Default Value of Accept_Mode

Hi Mukesh,

 

Leaving the default value to be implementation

dependent may not be a good idea as it will cause

interoperability issues in environments where

customers  have a mix of devices from different

vendors.

 

John

 

From: [email protected] [mailto:[email protected]] On Behalf Of
Mukesh Gupta
Sent: Friday, October 02, 2009 4:26 PM
To: [email protected]
Cc: [email protected]; Adrian Farrel
Subject: [VRRP] Default Value of Accept_Mode

 

[WG Chair Hat Off]

 

Folks,

 

During the IESG review of the unified VRRP draft, Dan, Operations and
Management AD, questioned the default value of the Accept_Mode in the
draft.  The current default value is False and he would like us to
reconsider that (his comments in the end of this email).

 

We had discussions about this on the mailing list.  However, I don't
remember having a clear WG consensus for either default value.

 

Given the fact that the default value has absolutely no impact on the
interoperability and the fact that both the values have their pros and
cons, we are proposing that the draft should leave the default value to
the implementations.  The draft would say that the implementations are
free to choose any default value.

 

Please let us know if you agree/disagree.  If we do not hear anything
back, we will assume that the WG agrees J

 

Regards

Mukesh

 

Dan's  Comment:

=============

3. Accept_Mode defaulting to false seems unrealistic at least in
deployments

I've seen.  Using accept-data config knob seems very common. Unless
enable

Accept_Mode, when the virtual address moves to the Backup, the virtual
address

no longer responds to ping; I've also seen an implementation to reject
pings to

the virtual IP when it's in Master mode, but this seems like an
implementation

bug if so (I'd like a confirmation if this is the case).

 

In any case, this restriction makes troubleshooting and deployment a
pain; hosts

and management systems often ping the gateway address to see if the
network is

working, and this kills that assumption.

 

Unless the WG has recently discussed and reached consensus that
Accept_Mode

should still default to false, I'd consider revisiting this position.

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