Hi Jason,
Buffer was a subject of discussion on the netmod list most recently by Tom
Petch who raised some questions. In an e-mail on 2016/5/6 Tom said:
“The description of log-buffer confuses me. The buffer is circular in nature
so there is only one of them; but it is a list keyed on 'name' so there are
lots of them. This leaf configures the amount number of log messages that can
be stored in the local memory logging buffer, so there is only one of them.
Or....?”
In the same e-mail Tom also commented on the complexity of the current model:
“My comment was more on the complexity that results from having so many
options. Other models are worse - some of the routing ones I find
unintelligible as a result - but I raised the issue on this model because it is
being discussed on this list where (almost) all the expertise in these matters
resides to see if anyone else would bite.”
In a reaction to Tom’s comments, I tried to simplify by changing the buffers
list back to a leaf in draft 09. In retrospect this was a mistake. Note that
AFAIK buffer is currently implemented by only two vendors: Cisco and
Alcatel-Lucent-Nokia.
The Cisco implementation has one buffer and specifies the limit as the total
buffer size in bytes.
The Alcatel-Lucent-Nokia implementation has multiple buffers and specifies the
limit in total messages.
If we make buffers a list, we still have three features in the model and the
necessity for implementations that support only one buffer to augment the model
to specify a max-elements statement. The three features are:
feature buffer-action {
description
"This feature indicates that the local memory logging buffer
action is supported.";
}
feature buffer-limit-bytes {
description
"This feature indicates that the local memory logging buffer
is limited in size using a limit expressed in bytes.";
}
feature buffer-limit-messages {
description
"This feature indicates that the local memory logging buffer
is limited in size using a limit expressed in number of log
messages.";
}
Does it make sense to simplify the model by removing the buffer action along
with the three features required and have vendors who implement buffer add it
to the model through augmentation?
A Netmod group consensus would be helpful here.
Thanks,
Clyde
On 11/13/16, 9:54 PM, "Sterne, Jason (Nokia - CA)" <[email protected]>
wrote:
Hi Clyde,
Somewhere in the past couple of revisions we dropped multiple memory
buffers. Version 8 (and a number of versions before that) had a list of
buffers in the YANG (but it wasn't in the pyang tree). But then version 9
onwards seem to have a single buffer.
Can we put that back to a list ? Implementations that only support a single
buffer can easily fit into a model that supports multiple buffers, but the
other way around doesn't work very well. I think it was accidently dropped
due to some confusion over some "if-feature" comments from Tom P at one point.
(note - also add (s) to buffer to make it buffer(s) in a couple of places
in section 3).
Regards,
Jason
-----Original Message-----
From: netmod [mailto:[email protected]] On Behalf Of Clyde Wildes
(cwildes)
Sent: Monday, November 14, 2016 8:52
To: [email protected]; [email protected]
Cc: [email protected]
Subject: Re: [netmod] I-D Action: draft-ietf-netmod-syslog-model-11.txt
Hi,
This draft addresses Phil Shafer’s comments and also removes references to
TLS for now.
Thanks,
Clyde
On 11/13/16, 3:47 PM, "netmod on behalf of [email protected]"
<[email protected] on behalf of [email protected]> wrote:
A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the NETCONF Data Modeling Language of the
IETF.
Title : A YANG Data Model for Syslog Configuration
Authors : Clyde Wildes
Kiran Koushik
Filename : draft-ietf-netmod-syslog-model-11.txt
Pages : 33
Date : 2016-11-13
Abstract:
This document describes a data model for the configuration of syslog.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-netmod-syslog-model/
There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-netmod-syslog-model-11
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-netmod-syslog-model-11
Please note that it may take a couple of minutes from the time of
submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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