Disabling a Virtual IP does not stop NetScaler advertising an RHI route to the VIP if the IP is used by an LB Virtual server with an active backup Virtual server bound.

 

Problem Cause

Current NetScaler behaviour causes RHI routes to continue to be advertised, even if the global VIP is disabled.  This is due to the fact that disabling a VIP may not completely disable the bound virtual servers.

If any of the Virtual Servers which share this Virtual IP have an active 'backup' virtual server, the vserver health is still 'up' overall and RHI route is still advertised.

For instance : 

Virtual IP 192.168.1.1 with RHI enabled

LB Virtual Server with IP 192.168.1.1 has a backup LB Virtual Server - its status is 'UP'

Now if you disable the Virtual IP, the LB Virtual server which shares this IP address goes to 'disabled' state but because there is a backup virtual server, the overall Virtual Server status remains 'UP'

Because the Virtual Server status is 'UP' - RHI routes continue to be sent.

This leads to a problem wherein a customer may disable a Virtual IP and expect the NetScaler to stop advertising the route to it.  In this scenario, this will not be the case.