GRE tunneling with the Key field allows the
   operators to have home networks that consist of multiple Virtual
   Private Networks (VPNs), which may have overlapping home addresses.
   When the tuple <Care of Address, Home Address, and Home Agent
   Address> is the same across multiple subscriber sessions, GRE
   tunneling will provide a means for the Foreign Agent and Home Agent
   to identify data streams for the individual sessions based on the GRE
   key.  In the absence of this key identifier, the data streams cannot
   be distinguished from each other -- a significant drawback when using
   IP-in-IP tunneling.

#show ip route 10.32.0.18

VRF: default
Codes: C - connected, S - static, K - kernel,
       O - OSPF, IA - OSPF inter area, E1 - OSPF external type 1,
       E2 - OSPF external type 2, N1 - OSPF NSSA external type 1,
       N2 - OSPF NSSA external type2, B - BGP, B I - iBGP, B E - eBGP,
       R - RIP, I L1 - IS-IS level 1, I L2 - IS-IS level 2,
       O3 - OSPFv3, A B - BGP Aggregate, A O - OSPF Summary,
       NG - Nexthop Group Static Route, V - VXLAN Control Service,
       DH - DHCP client installed default route, M - Martian,
       DP - Dynamic Policy Route, L - VRF Leaked

 B E      10.32.0.18/32 [20/0] via 10.32.32.13, Vlan4085
                               via 10.32.32.15, Vlan4085

#show ip load-sharing trident fields
Hash seed is 0
Ingress interface for IP hashing is ON
IP protocol field hashing is ON
IP source address hashing is ON
IP destination address hashing is ON
IP TCP/UDP/SCTP source port hashing is ON
IP TCP/UDP/SCTP destination port hashing is ON
Ingress interface for IPv6 hashing is ON
IPv6 protocol field hashing is ON
IPv6 source address hashing is ON
IPv6 destination address hashing is ON
IPv6 TCP/UDP/SCTP source port hashing is ON
IPv6 TCP/UDP/SCTP destination port hashing is ON
IPv6 flow label hashing is ON
GTPv1 TEID hashing is OFF
GTPv2 TEID hashing is OFF