DASH Behavioral Model WG, 4 May 2023

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From YouTube: DASH Behavioral Model WG May 4 2023

Description

Continued ACL tag conversation
Do we have a list of tags, or 1 tag? Clarify...

A

um Good morning, everyone uh thanks for coming to the behavioral model, call uh 4th of May, and so tomorrow is Cinco de Mayo, so Olay um anyway I'm displaying my screen here and last time we talked about the at the private link. Mapping and we went Marion uh took us through the changes in the pr I had provided some Snips and sent those out, um but um we did this and then we were maybe gonna, think about having pr246 sync to Maine and and then I would merge.

A

I haven't seen that come through yet, but um when it does I'm happy to do it, so you can do that. um I'll, wait for Marina hi shy. We were just talking about the uh PR that.

B

A

Hi we were submitting, we were talking about the pr that Marianne submitted last time, shy about adding the private link mapping. So um that's what we did last time. We had the call and then I think this time um was it Clark from Alibaba. Did you have something you wanted to go over.

C

I know I I joined this meeting for uh for the first time and I just want to see how things worked out in this meeting.

A

C

Right, yeah, great and then and then I will follow. This follow the procedure here. Okay,.

A

All right, so um we won't talk about the NVA PR this week in behavioral model. Okay, um so anyway, um were there questions about this PR from last week from anyone.

A

Hi Marianne Marion we have uh your co-worker Shai is here. I was just telling him about the pr you submitted last time. We were here and what what we went through so um yeah there was that no questions on that, and so um maybe we could go through. uh Maybe a quick Marine did we want to do this 246 this week, syncing to main.

D

Let me check because I don't remember, uh I'll get back to you in five minutes.

D

There was another thing: I don't know if there was an issue open or not uh asking if uh about ACL tags asking if we can uh have actually in the behavioral model, have ACL tags act as optional, meaning that, if nothing is uh so, we can use either a list or ACL tag. It shouldn't be both so yeah. There is a way to do it. This I, don't know I wanted to ask you Christina. If there was an issue open, if not I will open one and after I finish with my current work.

D

I can add this functionality as well to behavioral model.

A

Was this the one stemming from the dash Community call from Vincent.

D

Yeah yeah I think so yeah.

A

Let me look, I may have you guys, forgive me one. Second, while I go back through my notes, um let's see here.

A

uh Let me look I'm gonna paste. It.

A

Was it was it this comment here, Marion.

A

Check where we, whether we can express all in an ACL model from Gohan.

C

What does that mean.

A

So we were talking about.

C

E

You need wild card. Every field match all IP packets. Is that what it means.

A

You have tag one feel to the Moon you can match on the tag, but not the prefix system.

D

Yeah yeah, that's the one that I was uh uh talking about yeah, so uh I.

B

D

If there's an issue open or.

A

I, don't think I have not seen an issue come through yet.

D

A

D

I'll open one, then, if there isn't.

F

A

Me double check right now: I'll pull the screen over and.

B

A

Let's go to Dash and go to issues, let's see what's happening over there.

A

Yeah there's one here: 360 from Vincent.

D

A

Then no I don't see another one.

F

B

G

B

G

That a solution for this question that uh each rule can have either Apple tag or prefix, but not both.

G

B

Question here was.

G

Whether the same rule can have both and then the answer was no The Arc agent will make sure that each rule can have either tag or type.

A

um We we said, if you have a prefix, don't expect a tag or if we have both we'll do a separate.

G

Correct so the same rule will not have both.

D

G

And then what? What is the change that we're doing in the BMV? To now.

F

Yeah there are other uh cases. Let me try to remember um I think if.

F

um So let me think.

F

It's either the tag is not provided at all. If.

A

The tag was not provided a Target level could match all tags.

F

Yeah, so the current behavior, when the tag.

D

Is isn't provided, I think that's the issue.

G

So the tag is not provided, then it wouldn't match that I mean there is nothing to match. So.

D

Now but um oh you're saying the mask: is zero.

G

A

I think Z said he was going to open uh a new PR to polish up. The wording, I think, is what he told me, because.

G

One issue I can think of here, which.

E

F

G

Know if it was ever, it has ever come up, but one issue that I noticed in this uh behavior is that probably we are matching all tags in each role, but I think we're supposed to match.

G

The rules should be hit. If even one tag is a hit. I, don't know how that is achieved in the behavior mode.

D

No, that that is uh achieved probably I, will also need to provide examples that that definitely works. We I had the same question. We verified this works.

G

Okay, because it's a bitmap when we try to match the rule, we will try to match all the bits, then to the mask.

D

Yeah but the bitmap has a slightly different meaning that we are setting the bets to wedge. This uh IP belongs that's of meaning like bits of the corresponding tags, so we will set all of the tags that this IP uh prefix appears in.

G

Mm-Hmm, yes, so let's say the IP prefix uh appears in two tags tag: one and two yeah.

D

G

We will have to to.

D

G

Has correct and the rule has say, tag two and three yeah.

D

And the rule, no, the rule only has uh one tag. So the rule looks that the vector has only uh one bit to match on you're matching only one bit in a row.

G

Oh, so, okay, because.

D

It's not a list of things, you're saying each room.

G

Oh, so each rule will have only one tag. Sir.

D

Yeah, that's intended uh usage because uh tag is already a list of prefixes right, so you're not combining then tags together. uh We only can express one tag, which is an alias for this list of bricks. So yeah I think I need to provide all of the examples and show words working to work because it's uh a little bit uh counterintuitive. It's a reverse.

H

Listen but if you're going to change the description too, it says list of source tag names, comma, separated in the you see the source stack there.

D

But which table is that.

H

uh This is a isn't this, an ACL rule. uh What we're looking at I'm! Sorry, I'm, not I'm, not able to see the explore context.

F

A

H

Is that's the ACL roulette because there's a port and can.

D

You go to the files changed and yeah.

D

Yeah, because one uh one rule should only have one source tag: one destination there.

I

So that all the way from the gnmi right, because.

G

I

Yeah, this is the dash Hackle Rule table in the gnmi.

A

Okay, guys help me what help me, what to look for while we're talking just 381 yeah.

D

The same comments same line, you just need more quantities.

G

Okay, you can look at the the sonic hld.md, okay left, yeah.

A

A

And it was 318 was the line yeah.

G

Yeah, just I'll go ahead, so here there is a source tag and a list of tag names for each rule.

F

Yeah right, okay, so we will probably need prints to clarify that. That's not expected, at least from what I know.

A

Okay and then I, don't know whether to call them Terrace or Z, but he opened this PR to polish. It.

A

I'll put this in the chat window too.

A

I can send these offline too.

H

So in that file stance is the it really that Christina look.

B

H

Can just see if it's changed, we can let it go.

A

Yeah, it's a Sonic HIV.

H

A

Sir, what are you guys saying? Is this enough info.

G

No, no. This is the other case where, if it's not provided it just describes what happens if the tag is not provided. Okay,.

H

Hold on to this one I think yeah, because the contention is I mean this thing is: uh should it be a list of tax or is it just one tag.

A

H

Yeah, so I think that if you can clarify.

A

And um so this is all I had on the agenda for today, did you guys have anything.

A

Sorry I'm just looking while we're talking.

F

No I've had some things for the next time.

A

Well, I forgot, um I, think Andy and Chris were collaborating on something um in the past how's the that going the.

E

The dpdk back end yeah.

A

E

Yeah I've got I've, got public filed GitHub issues on the open source, p4c dvdk compiler, with uh known issues trying to do that and have verbally talked with some Intel Engineers working on that um or responsible for working on that, and it is still not highest in their priority list. Yeah don't know when.

B

A

I'll I'll flesh out the notes later so you guys will have to watch.

E

Me do it I think in a previous week, I sent a link to uh public GitHub issues. I can send those again if you, if you want them in the notes for anybody tracking it I, can send it out. If you want to know well.

A

There was this link about that. Well, that was just some sample code if depth now: okay yeah, if you want to, if you have it, that's great, um if you don't that's fine, okay, sure the engineers who work on this uh okay, I'll just copy this over great and so um anything else for this week, guys anything you want to talk about um I! Think on the dash Community call I mentioned the smart Nick Summit is coming up, didn't know if any of you are going to attend, I believe Gerald's coming down.

B

I will try to be there.

C

Yeah reshma I missed you at the P4 Workshop. Yes,.

B

Those days are extremely busy and uh yeah I also didn't register on time.

E

And I kept kept a lid on things.

A

B

A

Just short notice, I'm scrambling around trying to get a like a drop cloth for the table. That says Microsoft, so um you know so it takes The Branding team a while to make these things so I'm just kind of doing that stuff in the back end, so I'll be around. If you guys want to talk about it or um you know, have lunch or a drink or something down, I'm sure it'll be really busy. I think they have a lot of events so.

B

F

B

On for three days, right, I, don't remember two days or two days.

A

13Th 14th and 15th, the 13th is a Tuesday. It's like a pre-conference workshop day and I think that um couple people's event a couple people actually submitted like their papers on dash and that I hadn't seen that before they had submitted them to the the sponsor, and then um we could put together some workshops on for the Tuesday and then Wednesday is all the Keynotes and then Thursday I can't remember what Thursday is so anyway yeah, that's all I had so um there's not anything else. I can give time back.

A

Seven second rule.

A

Okay, guys, thanks for coming thanks.

B

A

Okay and I'll remind about the issue that needs to be opened and everything so have a good day. Bye-Bye.

B