Re: [Time] Strong Technology Dependency
Qin Wu <bill.wu@huawei.com> Tue, 01 July 2014 11:03 UTC
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From: Qin Wu <bill.wu@huawei.com>
To: "huubatwork@gmail.com" <huubatwork@gmail.com>, "time@ietf.org" <time@ietf.org>
Thread-Topic: [Time] Strong Technology Dependency
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Date: Tue, 01 Jul 2014 11:02:51 +0000
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Subject: Re: [Time] Strong Technology Dependency
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Thank for explanation on relation between G.8013 and IEEE 802.1ag CFM. I see the pictures how these ITU-T documents are related. Most important G.8113.2 is defined by IETF based on IETF work (e.g.,RFC6426,RFC6428). Regards! -Qin 发件人: Time [mailto:time-bounces@ietf.org] 代表 Huub van Helvoort 发送时间: 2014年7月1日 15:22 收件人: Qin Wu; time@ietf.org 主题: Re: [Time] Strong Technology Dependency Hello Qin, Indeed ITU-T worked together with IEEE on the CFM concept. ITU-T has added/developed OAM tools for performance monitoring. G.8013 (Ethernet OAM) and G.8113.1 (MPLS-TP OAM) are aligned. Bets regards, Huub. Hi, Hubb: Thanks for your clarification. That is to say, In IETF MPLS-TP OAM tools, we can use BFD to provide CC and CV(See RFC6428) and use LSP ping to provide CV (See RFC6426). ITU-T MPLS-TP adopt IEEE802.1ag CFM conception and integrate Ethernet OAM tools, then within MPLS-TP, we can use CFM OAM tool to provide CC and CV. Regards! -Qin 发件人: Time [mailto:time-bounces@ietf.org] 代 表 Huub van Helvoort 发 送时间: 2014年6月30日 20:40 收件人: time@ietf.org<mailto:time@ietf.org> 主题: Re: [Time] Strong Technology Dependency Qin, 您好, You wondered: [Qin]: Besides using BFD, is there any other way to provide CC or CV? Yes. Please read ITU-T recommendation G.8113.1 (MPLS-TP OAM tools based on G.8013/Y.1731). It describes the CCM OAM tool that provides CC and CV, it is in fact the Ethernet CCM with an MPLS-TP header. (G.8113.2 describes MPLS-TP OAM tools based on BFD and LSP-ping). Best regards, Huub. 发件人: OPSAWG [mailto:opsawg-bounces@ietf.org] 代表 Qin Wu 发送时间: 2014年6月25日 16:06 收件人: time@ietf.org<mailto:time@ietf.org>; opsawg@ietf.org<mailto:opsawg@ietf.org> 抄送: mohamed.boucadair@orange.com<mailto:mohamed.boucadair@orange.com> 主题: [OPSAWG] Strong Technology Dependency Hi, Mohamed: Thanks for details review to problem statement draft http://tools.ietf.org/html/draft-ww-opsawg-multi-layer-oam-00 and update I sent to you. Regarding strong technology dependency issue, Section 4.2 gives an address scheme example to explain why the existing OAM mechanism has strong Technology as follows: “ Addressing scheme is a good example for an issue that has a high price for being non-generic. Ping of IPv4 and IPv6 looks different in the addressing scheme as well in the ICMP indication field, but they have the same OAM functionalities. ” You asked to clarify the exact point of this paragraph. I think what this paragraph said is For IP ping, IPv4 Ping protocol [RFC792] and IPv6 ping protocol [RFC4443] use different IP technology but share the same OAM function. But I agree with you address scheme is not a typical example for strong technology dependency. I think the typical example is ICMP, LSP Ping and MPLS-TP OAM are using different network technology but share the same OAM functionality, i.e., Path Discovery. Another example is ICMP,BFD,LSP Ping and MPLS-TP OAM are using different network technology but share the same functionality, i.e., continuity check. The following figure shows common OAM functionalities shared by various existing OAM protocols. |--------+-----------+--------------+--------------+------------+ | |Continuity | Connectivity| Path | Performance| | | Check | Verification| Discovery | Monitoring | +--------+-----------+--------------+--------------+------------+ | | | | | | | ICMP | | Echo(Ping) | Traceroute | | | | | | | | +--------+-----------+--------------+--------------+------------+ | | | | | | | BFD | BFD | BFD Echo | | | | | Control | | | | +--------+-----------+--------------+--------------+------------+ | LSP | | | | - Delay | | Ping | | Ping | Traceroute | - Packet | | | | | | Loss | +--------+-----------+--------------+--------------+------------+ | | | | | | | IPPM | | | | | | | | | | | |--------+-----------+--------------+--------------+------------+ | MPLS-TP| | | | | | OAM | CC | CV | Traceroute | -Delay | | | | | | -Packet | | | | | | Loss | +--------+-----------+--------------+--------------+------------+ Hope this clarifies. Regards! -Qin 发件人: mohamed.boucadair@orange.com<mailto:mohamed.boucadair@orange.com> [mailto:mohamed.boucadair@orange.com] 发送 时间: 2014年6月24日 22:13 收件人: Qin Wu 主题: RE: Unified oam BOF proposal request in IETF 90 Hi Qin, Please find attached a first set of comments. Cheers, Med _______________________________________________ Time mailing list Time@ietf.org<mailto:Time@ietf.org> https://www.ietf.org/mailman/listinfo/time -- ***************************************************************** 请记住,你是独一无二的,就像其他每一个人一样 -- ***************************************************************** 请记住,你是独一无二的,就像其他每一个人一样
- [Time] Strong Technology Dependency Qin Wu
- [Time] Issue of OAM information Information gathe… Qin Wu
- Re: [Time] Strong Technology Dependency Qin Wu
- Re: [Time] Issue of OAM information Information g… Qin Wu
- Re: [Time] Strong Technology Dependency Huub van Helvoort
- Re: [Time] Strong Technology Dependency Gregory Mirsky
- Re: [Time] [OPSAWG] Strong Technology Dependency Gregory Mirsky
- Re: [Time] [OPSAWG] Strong Technology Dependency Tom Taylor
- Re: [Time] Strong Technology Dependency Qin Wu
- Re: [Time] Strong Technology Dependency Qin Wu
- Re: [Time] [OPSAWG] Strong Technology Dependency Huub van Helvoort
- Re: [Time] Strong Technology Dependency Huub van Helvoort
- Re: [Time] Strong Technology Dependency Qin Wu
- Re: [Time] Strong Technology Dependency Gregory Mirsky
- Re: [Time] Issue of OAM information Information g… Gregory Mirsky
- Re: [Time] Strong Technology Dependency Qin Wu
- Re: [Time] Strong Technology Dependency Gregory Mirsky
- Re: [Time] Strong Technology Dependency Sam Aldrin
- Re: [Time] Strong Technology Dependency Qin Wu
- Re: [Time] Strong Technology Dependency Sam Aldrin
- Re: [Time] Strong Technology Dependency Qin Wu
- Re: [Time] Strong Technology Dependency Sam Aldrin
- [Time] 答复: Strong Technology Dependency Qin Wu
- Re: [Time] Strong Technology Dependency Gregory Mirsky
- Re: [Time] Strong Technology Dependency Sam Aldrin
- Re: [Time] Strong Technology Dependency Gregory Mirsky
- Re: [Time] Strong Technology Dependency Sam Aldrin
- Re: [Time] Issue of OAM information Information g… Qin Wu
- Re: [Time] Issue of OAM information Information g… Gregory Mirsky