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Hello, Here is the Any connect VPN for iPhone, smart phone configuration guide: http://www.cisco.com/c/en/us/td/docs/security/vpn_client/anyconnect/anyconnect30/user/guide/iphone-ugac-ios.html
In a fail over context for instance HSRP, VRRP etc.. the GARP update the ARP table on all the switches that falls on the same broadcast domain. But no changes to end user or the domain outside to the current broadcast where the fail over occurred.