The SRRP state tracking by routes is turned on only when needed.
For subscriber-interface routes (IPv4 and IPv6), this is performed explicitly.
subscriber-interface <ip-int-name>
address <ip-address> gw-ip-address <gw-address> track-srrp <inst-name> holdup-
time <msec>
ipv6
subscriber-prefixes
prefix <ipv6-prefix> pd track-srrp <srrp-id> holdup-time <msec>
prefix <ipv6-prefix> wan-host track-srrp <srrp-id> holdup-time <msec>
For managed and subscriber management routes, this is explicitly enabled under the group interface:
group-interface <ip-int-name>
srrp-enabled-routing holdup-time <msec>