You need to examine the RAPID-CITY MIB and look for the "IP DHCP Forward Table";
rcIpDhcpForwardTable OBJECT-TYPE
SYNTAX SEQUENCE OF RcIpDhcpForwardEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION "DHCP forwarding table."
::= { rcIp 9 }
rcIpDhcpForwardEntry OBJECT-TYPE
SYNTAX RcIpDhcpForwardEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION "An entry used represents a DHCP forwarding directive."
INDEX { rcIpDhcpForwardAgentAddr, rcIpDhcpForwardServerAddr }
::= { rcIpDhcpForwardTable 1 }
RcIpDhcpForwardEntry ::=
SEQUENCE {
rcIpDhcpForwardAgentAddr IpAddress,
rcIpDhcpForwardServerAddr IpAddress,
rcIpDhcpForwardEnable TruthValue,
rcIpDhcpForwardMode INTEGER,
rcIpDhcpForwardRowStatus RowStatus
}
Good Luck!