Re: [i2rs] I2RS Interim Meeting - June 1, 2016 - 10:00am - 11:00am - Topic: Ephemeral State Requirements

["Susan Hares" <[e-mail]>]

Joel: 

I am surprised you asked this question as you have followed the I2RS data
modules.  Is this question rhetorical? 
Ephemeral operational state have three types: 

1) results of rpc operations stored to respond to rpc actions 

I2RS-RIB-Data 
Rpcs: 
      +---x rib-add
      |  +---w input
      |  |  +---w rib-name        string
      |  |  +---w rib-family      rib-family-def
      |  |  +---w ip-rpf-check?   boolean
      |  +--ro output
      |     +--ro result uint32
      |     +--ro reason? string

2) notification data stored 


I2RS-RIB-Data
   notifications:
      +---n nexthop-resolution-status-change
      |  +--ro nexthop
..... 
      +---n route-change
         +--ro rib-name                 string
         +--ro rib-family               rib-family-def
         +--ro route-index              uint64

3) read-only status information 

See my presentation where the bgp-global-config - can be used by config or
state.  It is ephemeral state augmenting these features.   Or see the L2
topology module below. 

augment /nw:networks/nw:network/nw:node/nt:termination-point:
   +--rw l2-termination-point-attributes
      +--rw description?          string
      +--rw maximum-frame-size?   uint32
      +--rw (l2-termination-point-type)?
      |  +--:(ethernet)
      |  |  +--rw mac-address?          yang:mac-address
      |  |  +--rw eth-encapsulation?    identityref
      |  |  +--rw port-vlan-id?         vlan {VLAN}?
      |  |  +--rw vlan-id-name* [vlan-id] {VLAN}?
      |  |     +--rw vlan-id      vlan
      |  |     +--rw vlan-name?   string
      |  +--:(legacy)
      |     +--rw encapsulation?        identityref
      +--ro tp-state?             Enumeration


Sue Hares 

-----Original Message-----
From: Joel M. Halpern [mailto:[e-mail]] 
Sent: Tuesday, May 31, 2016 4:10 PM
To: Susan Hares
Cc: [e-mail]
Subject: Re: [i2rs] I2RS Interim Meeting - June 1, 2016 - 10:00am - 11:00am
- Topic: Ephemeral State Requirements

Can you clarify something for me?
What is ephemeral operational state?

The only thing I can think of is operational state like statistics related
to ephemeral leaves or constructs?
Is that what you mean by "ephemeral operational state"?
The reason i ask is that such state does not seem to need any special
handling or labeling.

Yours,
Joel

On 5/31/16 3:29 PM, Susan Hares wrote:
> Juergen:
>
>
>> I understand YANG validation rules and I understand YANG's notion of
> configuration datastores. I do not >think this matches your ephemeral 
> configuration validation.
>
> This does not provide a technical discussion of:
> a) what you understand the ephemeral configuration validation rules to 
> be,
> b) why you do not the model matches the configuration validation rules.
>
> 1 Data Model is a great idea for NETCONF/NETMOD.  However, it should 
> encompass
>
> Ephemeral data:== ephemeral state ::== Ephemeral configuration + 
> Ephemeral operational state
>
> Cheers,
>
> Sue