F5上对某一连接的发送和接收是在不同VLAN上进行的情况处理 asymmetric connections across multiple VLANs

缺省情况下，F5要求从F5发送出去的请求的响应必须在同一VLAN上被接收到，否则该连接将被RST掉，这是VLAN-key特性。如果一个连接请求和响应分别发生在不同VLAN上，那么必须关闭vlan-key功能。在system- general配置界面中有关于vlan-key的设置。

关闭vlan-key特性后，有以下副作用：

1. PVA功能将散失 SOL6417: PVA is not compatible with asymmetric connections across multiple VLANs

https://support.f5.com/kb/en-us/solutions/public/6000/400/sol6417.html

2.SOL8271: Asymmetric routing of client-side traffic may cause connections to stall

https://support.f5.com/kb/en-us/solutions/public/8000/200/sol8271.html