我們在安裝VC（VMware vCenter Server）的時候請勿將主機名中含有“_”符號，這將會導致web?client無法注冊到invetory當中。
If the vCenter Server host name contains an underscore, it is considered an invalid host name and that vCenter Server does not appear in the vSphere Web Client.
To resolve this issue, change the host name of the vCenter Server so that it does not contain any underscores.
If the host name is VCENTER_PROD, rename it to VCENTERPROD or another name without an underscore
bound up in this question:
- The keyboard of the Teletype (TTY) ASR-33 (a very common terminal interface of the period from whence this standard hails – I cut my computing teeth on one in grade school) doesn’t have underscore on it: which gives one a nasty problem: how do you type (input) a hostname if the hostname in question contains a character that your terminal interface can’t generate?
- software precedent (what the software of the day would accept),
- simplification to avoid confusion (it’s very easy to confuse dash and underscore)
- personal preference of the standards author (accepted by the community without objection).
互聯網工程任務組-Internet Engineering Task Force (IETF)，成立于1985年底，是全球互聯網最具權威的技術標準化組織，主要任務是負責互聯網相關技術規范的研發和制定，當前絕大多數國際互聯網技術標準出自IETF。