[sami] 答复: Trying to figure out where we are
"Yingjie Gu(yingjie)" <guyingjie@huawei.com> Tue, 30 August 2011 01:29 UTC
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Date: Tue, 30 Aug 2011 09:30:58 +0800
From: "Yingjie Gu(yingjie)" <guyingjie@huawei.com>
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To: 'Thomas Narten' <narten@us.ibm.com>
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Cc: 'Melinda Shore' <melinda.shore@gmail.com>, sami@ietf.org, 'zhangyunfei' <zhangyunfei@chinamobile.com>
Subject: [sami] 答复: Trying to figure out where we are
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Hi Thomas and all, We are making effort on a use case draft now, and will present it at early Sep. Best Regards Gu Yingjie -----邮件原件----- 发件人: Thomas Narten [mailto:narten@us.ibm.com] 发送时间: 2011年8月25日 乐乐21:11 收件人: Yingjie Gu(yingjie) 抄送: 'zhangyunfei'; 'Melinda Shore'; sami@ietf.org 主题: Re: [sami] Trying to figure out where we are "Yingjie Gu(yingjie)" <guyingjie@huawei.com> writes: > In previous mail discussion, there are questions on why should VM be > migrated. I think we should take it as a given that VMs move around. People do that today, we all see the value. > And also, in the side meeting at Quebec, people want to learn the use case > from real scenario. Yes. looking at specific scenarios allows us to ask the question of whether the scenario is realistic and corresponds to what operators actual do today (or want to do), or whether it is just a theoretical problem (in which case it's very questionable whether the IETF should do work.) > I guess Yunfei's use case could be an answer to that. See my previous posting, I don't understand what use case this is yet. > Here are some of the states that I can see on the devices that need to be > migrated. > 1. States on switches: > 1.1 DHCP snooping table on ports; How often does DHCP snooping take place in data centers? In other words, is this a real problem, or a theoretical one? > 1.2 IGMP snooping table on ports; I think we need to outline some specific scenarios that describe what the problem actually is here. Who is doing snooping, why, and why a VM move leaves something not working. > 1.3 Dynamic ACL which is created by traffic or authentication; A specific scenario would be helpful here. Both so I can understand the details of the problem, and so we can discuss whether the scenario is a real problem in existing datacenters today, or just a theoretical problem. > 2. States on FW > 2.1 TCP Connect States > 2.2 Dynamic ACL Same as above. > 3. States on LB > 3.1 Connect States. > 3.2 Session States. Same as above. > 4. States on IPS/IDS. > 4.1 Cumulative data Same as above. > We can think about two scenarios: > 1. VM migrate within the subnet under the same FW/LB/IPS. In this case, > states also migrate under the same FW/LB/IPS etc. > States need to be migrated include 1.1, 1.2, 1.3. Before we spend a lot of time on this, we need to establish that there are actual real scenarios that correspond to real problems happening in data centers today. If a problem is just theoretical, it becomes very unclear whether the IETF should do any work (at this time). I am not interested in discussing solutions, or even the problem in much detail, if there is no compelling scenario motivating the problems for which solutions are being considred. Thomas
- [sami] Welcome to SAMI and something you may like… Yingjie Gu(yingjie)
- Re: [sami] Welcome to SAMI and something you may … Juergen Schoenwaelder
- Re: [sami] Welcome to SAMI and something you may … Yingjie Gu(yingjie)
- Re: [sami] Welcome to SAMI and something you may … Linda Dunbar
- Re: [sami] Welcome to SAMI and something you may … Yingjie Gu(yingjie)
- Re: [sami] Welcome to SAMI and something you may … So, Ning
- Re: [sami] Welcome to SAMI and something you may … Melinda Shore
- Re: [sami] Welcome to SAMI and something you may … Yingjie Gu(yingjie)
- Re: [sami] Welcome to SAMI and something you may … Yingjie Gu(yingjie)
- Re: [sami] Welcome to SAMI and something you may … So, Ning
- Re: [sami] Welcome to SAMI and something you may … Melinda Shore
- [sami] Scope [was Re: Welcome to SAMI and somethi… Melinda Shore
- Re: [sami] Bringing new work into the IETF Yingjie Gu(yingjie)
- [sami] Bringing new work into the IETF David Harrington
- Re: [sami] Bringing new work into the IETF Melinda Shore
- Re: [sami] Bringing new work into the IETF Thomas Narten
- Re: [sami] Welcome to SAMI and something you may … Juergen Schoenwaelder
- Re: [sami] Bringing new work into the IETF So, Ning
- Re: [sami] Bringing new work into the IETF Melinda Shore
- Re: [sami] Bringing new work into the IETF Thomas Narten
- Re: [sami] Bringing new work into the IETF So, Ning
- Re: [sami] Bringing new work into the IETF david.black
- [sami] 答复: Trying to figure out where we are Yingjie Gu(yingjie)
- Re: [sami] Bringing new work into the IETF Melinda Shore
- Re: [sami] Bringing new work into the IETF Benson Schliesser
- Re: [sami] Bringing new work into the IETF So, Ning
- Re: [sami] Welcome to SAMI and something you may … Warren Kumari
- [sami] Trying to figure out where we are Melinda Shore
- Re: [sami] Trying to figure out where we are Yingjie Gu(yingjie)
- Re: [sami] Trying to figure out where we are zhangyunfei
- Re: [sami] Trying to figure out where we are Thomas Narten
- Re: [sami] Trying to figure out where we are Jamal Hadi Salim
- Re: [sami] Trying to figure out where we are Yingjie Gu(yingjie)
- Re: [sami] Trying to figure out where we are Thomas Narten
- Re: [sami] Trying to figure out where we are Warren Kumari