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网络 - VXLAN
2022-07-04 03:51:00 【王万林 Ben】
什么是VXLAN
VXLAN是一种网络虚拟化技术,它将原始的以太网包,封装在UDP header与VXLAN header内。
端口
VXLAN隧道使用的UDP端口,IANA分配的为4789,Linux内核分配的为8472。
使用场景
VXLAN在云数据中心之间虚拟机迁移中的应用,如某个企业在不同的数据中心有不同业务应用的虚拟机,数据中心之间虚拟机迁移是经常会遇到的,为了保证虚拟机迁移过程中业务不中断,则需要保证迁移虚拟机的IP地址、MAC地址等参数保持不变,这就要求虚拟机迁移前后属于统一个二层网络。如果使用传统方法解决此问题,可能需要购买新的物理设备以分离流量,并可能导致诸如VLAN散乱、网络成环以及系统和管理开销等问题。
参考资料
VLAN和VXLAN,两者有何区别?VXLAN运用场景有哪些?-51CTO.COM
https://learning.oreilly.com/library/view/learning-openstack-networking/9781788392495/576986af-ab3d-460e-bc58-75b13ac9a664.xhtml#:~:text=The%20default%20port%20for%20UDP,port%20used%20by%20Open%20vSwitch.
VXLAN在虚拟机迁移场景中的应用 - CloudEngine 16800 V200R020C10 配置指南-VXLAN - 华为
Smooth VM Migration Using VXLAN - S5720 and S6720 V200R011C10 Configuration Guide - VXLAN - Huawei
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