The value of vRtrRsvpIfAuthentication specifies whether
authentication is enabled. When the value is 'true', authentication
using MD5 message based digest protocol is enabled and
vRtrRsvpIfAuthenticationKey specifies the authentication key to be
used.
When the value of vRtrRsvpIfAuthentication is 'false', authentication
using MD5 message based digest protocol is disabled and
vRtrRsvpIfAuthenticationKey is an empty string.
vRtrRsvpIfAuthentication and vRtrRsvpIfAuthenticationKey, which
indicates whether or not authentication is enabled, must be set
together in the same SNMP request PDU when vRtrRsvpIfAuthentication
is 'true' or else the set request fails with an inconsistentValue
error.