Re: [netmod] Inventory YANG model (entity-MIB)
Andy Bierman <andy@yumaworks.com> Mon, 09 March 2015 17:24 UTC
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Date: Mon, 09 Mar 2015 10:24:12 -0700
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From: Andy Bierman <andy@yumaworks.com>
To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>, Jeffrey Haas <jhaas@pfrc.org>, Benoit Claise <bclaise@cisco.com>, NETMOD Working Group <netmod@ietf.org>, draft-dong-i2rs-network-inventory@tools.ietf.org, "i2rs-chairs@tools.ietf.org" <i2rs-chairs@tools.ietf.org>
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Subject: Re: [netmod] Inventory YANG model (entity-MIB)
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On Sun, Mar 8, 2015 at 1:29 PM, Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> wrote: > On Sun, Mar 08, 2015 at 03:08:37PM -0400, Jeffrey Haas wrote: >> [speaking largely as a contributor and not i2rs-chair] >> >> On Fri, Mar 06, 2015 at 12:05:36PM +0100, Juergen Schoenwaelder wrote: >> > My first question is (perhaps not surprising) whether inventory falls >> > into the I2RS charter, I2RS = interface to the routing system. That >> > said, RFC 6643 gives you a read-only translation. There are not many >> > read-write objects in the ENTITY-MIB so perhaps this is good enough >> > for now. I guess it would help what I2RS needs to know in order to >> > make the interface to the routing system work. >> >> As discussed later in thread, having this work owned by netmod is fine with >> I2RS. >> >> The structure of the generic topology draft is leading to interesting >> questions about how information present in that model can link to higher and >> lower layers. As seen in the I2RS presentations at the most recent interim, >> this eventually leads to questions like "inventory". I also raised the >> question about tunnels which will lead to other models as well. >> >> The fact that the IETF already has good models for some of these things, the >> ENTITY-MIB as an example, is good. However, simple conversion of MIBs to >> yang modules are likely to result in models that are good MIB replacements, >> but might not be well tailored to re-use elsewhere. Since much of the >> motivation is for re-use, re-use is the discussion I would suggest is most >> important. >> >> As an example, SNMP tables probably should be converted into yang groupings. >> There's also the matter of indexing of such conversions may not be fully >> appropriate for such re-use and alternate indexes may be helpful. > > Nobody is insisting on an SNMP translation but whatever is done better > allows export via the ENTITY-MIB as well - things need to be aligned > at least. I note that many of the things you mention are not part of > draft-dong-i2rs-network-inventory-00.txt either. > I start to worry about I2RS boiling the ocean when I see inventory data models in that WG. I question the value of converting every OID to a YANG identity, or making gratuitous name changes to every leaf. Perhaps an SMI to YANG translation of the ENTITY-MIB will be a good enough starting point. I prefer to see IETF YANG work focus on configuration, rather than reinvent monitoring solutions that have been deployed for many years. >> > PS: I personally would have preferred if generic topology and perhaps >> > inventory would have split off into a short-lived targeted WG >> > instead of doing all of this in I2RS but it seems leadership has >> > already decided that I2RS is the home for all of this. >> >> [speaking as one of the i2rs-chairs] >> >> Topology was one of the use cases that was in-charter and we're not looking >> to significantly expand our charter work. But one thing we've noted over >> the life of the group is that there has been a lot of push for micro-WG to >> be formed for various yang efforts. I personally believe we're better off >> with some owning WG taking on the task but handling it within the context of >> a design team. The overhead of a full WG is likely not merited. >> >> Which WG the design team reports to is, of course, up for discussion. >> > > What was in the original I2RS charter was routing topology export > (read-only). Going from there to a generic topology model (which > likely should not be limited to config false) is quite a step. I > personally find it sub-optimal to do the generic model in WG A and > several extensions of the generic model in WG B plus some more > extensions in WG C, most likely crossing IETF areas. The coordination > resulting from this will most likely slow things down. > > /js > Andy > -- > Juergen Schoenwaelder Jacobs University Bremen gGmbH > Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany > Fax: +49 421 200 3103 <http://www.jacobs-university.de/> > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod
- [netmod] Inventory YANG model (entity-MIB) Benoit Claise
- Re: [netmod] Inventory YANG model (entity-MIB) Juergen Schoenwaelder
- Re: [netmod] Inventory YANG model (entity-MIB) Susan Hares
- Re: [netmod] Inventory YANG model (entity-MIB) Benoit Claise
- Re: [netmod] Inventory YANG model (entity-MIB) Thomas D. Nadeau
- Re: [netmod] Inventory YANG model (entity-MIB) Juergen Schoenwaelder
- Re: [netmod] Inventory YANG model (entity-MIB) Susan Hares
- Re: [netmod] Inventory YANG model (entity-MIB) Tina TSOU
- Re: [netmod] Inventory YANG model (entity-MIB) Benoit Claise
- Re: [netmod] Inventory YANG model (entity-MIB) Susan Hares
- Re: [netmod] Inventory YANG model (entity-MIB) Jeffrey Haas
- Re: [netmod] Inventory YANG model (entity-MIB) Juergen Schoenwaelder
- Re: [netmod] Inventory YANG model (entity-MIB) Andy Bierman
- Re: [netmod] Inventory YANG model (entity-MIB) Dongjie (Jimmy)
- Re: [netmod] Inventory YANG model (entity-MIB) Romascanu, Dan (Dan)
- Re: [netmod] Inventory YANG model (entity-MIB) Thomas Nadeau
- Re: [netmod] Inventory YANG model (entity-MIB) Thomas Nadeau
- Re: [netmod] Inventory YANG model (entity-MIB) Dongjie (Jimmy)
- Re: [netmod] Inventory YANG model (entity-MIB) Dongjie (Jimmy)
- Re: [netmod] Inventory YANG model (entity-MIB) Andy Bierman
- Re: [netmod] Inventory YANG model (entity-MIB) Susan Hares
- Re: [netmod] Inventory YANG model (entity-MIB) Dongjie (Jimmy)
- Re: [netmod] Inventory YANG model (entity-MIB) Andy Bierman
- Re: [netmod] Inventory YANG model (entity-MIB) Juergen Schoenwaelder
- Re: [netmod] Inventory YANG model (entity-MIB) Benoit Claise
- Re: [netmod] Inventory YANG model (entity-MIB) Juergen Schoenwaelder
- Re: [netmod] Inventory YANG model (entity-MIB) Benoit Claise
- Re: [netmod] Inventory YANG model (entity-MIB) Dongjie (Jimmy)
- Re: [netmod] Inventory YANG model (entity-MIB) Juergen Schoenwaelder
- Re: [netmod] Inventory YANG model (entity-MIB) Dongjie (Jimmy)
- Re: [netmod] Inventory YANG model (entity-MIB) Juergen Schoenwaelder
- Re: [netmod] Inventory YANG model (entity-MIB) Thomas D. Nadeau
- Re: [netmod] Inventory YANG model (entity-MIB) Mahesh Jethanandani
- Re: [netmod] Inventory YANG model (entity-MIB) Dongjie (Jimmy)
- Re: [netmod] Inventory YANG model (entity-MIB) Dongjie (Jimmy)
- Re: [netmod] Inventory YANG model (entity-MIB) Juergen Schoenwaelder