b09f51b5_HCP_Overview__Support____Cisco__DHCP_Option_Name
[DHCP Option Code] 59 [Description] Specifies the time interval from address assignment until the client transitions to the rebinding state. [DHCP Option Name] 
Rebinding (T2) time option
IP Addressing: DHCP Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 1000) - DHCP Overview [Support] - Cisco