The IP protocol to which this rule applies. For protocol forwarding,
valid options are TCP, UDP, ESP, AH, SCTP, ICMP and L3_DEFAULT. The
valid IP protocols are different for different load balancing
products as described in Load balancing
features <https://cloud.google.com/load-balancing/docs/features#protocols_from_the_load_balancer_to_the_backends>__.
Values:
UNDEFINED_I_P_PROTOCOL_ENUM (0):
A value indicating that the enum field is not
set.
AH (2087):
No description available.
ESP (68962):
No description available.
ICMP (2241597):
No description available.
L3_DEFAULT (48151369):
No description available.
SCTP (2539724):
No description available.
TCP (82881):
No description available.
UDP (83873):
No description available.
