[mpls] current state transition definiton cause returning Normal directly without WTR.
"Feng, Ying (NSN - CN/Shanghai)" <ying.feng@nsn.com> Tue, 24 July 2012 01:47 UTC
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Thread-Topic: current state transition definiton cause returning Normal directly without WTR.
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From: "Feng, Ying (NSN - CN/Shanghai)" <ying.feng@nsn.com>
To: wyaacov@gmail.com, "Sprecher, Nurit (NSN - IL/Hod HaSharon)" <nurit.sprecher@nsn.com>
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Cc: "Zhao, Peng (NSN - CN/Shanghai)" <peng.zhao@nsn.com>, "Ma, Kai 1. (NSN - CN/Shanghai)" <kai.1.ma@nsn.com>, "Doolan, Paul (NSN - US/Irving)" <paul.doolan@nsn.com>, MPLS@ietf.org
Subject: [mpls] current state transition definiton cause returning Normal directly without WTR.
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Dear Yaacov Weingarten, We found an issue below during the implementation: According to the state transition definition in rfc6378, when both local working path signal fail and remote working path signal fail, APS state will be local protection failure state. then if local working path signal fail clear comes, it will enter remote protection failure state and send NR request. when in remote protection failure state, it will return to Normal when NR request is received. Thus if both ends have working path signal fail clear at same/very-close time, then both ends will return Normal directly. That is no WTR state In my opinion, this transition without WTR is not expected. Please have a double check. Look forward to your reply, thank you! Best Regards Feng Yingzhen Nokia Siemens Networks Transport Systems (Shanghai) Ltd. 诺基亚西门子通信技术（北京）有限公司上海分公司 9/F, Building 89, 1122 North Qin Zhou Road, Shanghai 200233, China 中国上海钦州北路1122号89号楼7楼 200233 Office: +86-21-60855761 Email: ying.feng@nsn.com
- Re: [mpls] current state transition definiton cau… Yaacov Weingarten
- [mpls] current state transition definiton cause r… Feng, Ying (NSN - CN/Shanghai)
- Re: [mpls] current state transition definiton cau… Feng, Ying (NSN - CN/Shanghai)