# Prerequisites

The prerequisites for working with each tool set of ManageEngine OpUtils are listed below.

## Diagnostic Tools

| Tool | Is SNMP needed? | Required MIBs |
|---|---|---|
| Ping | No | None |
| SNMP Ping | Yes | RFC1213-MIB |
| Proxy Ping | Yes | CICSO-PING-MIB |
| Trace Route | No | None |

## Address Monitoring Tools

| Tool | Is SNMP needed? | Required MIBs |
|---|---|---|
| MAC Address Resolver | Yes | RFC1213-MIB |
| DNS Resolver | No | None |
| DHCP Scope Monitor | Yes | DHCP-MIB, RFC1213-MIB |
| MAC IP List | No | None |

## Network Monitoring Tools

| Tool | Is SNMP needed? | Required MIBs |
|---|---|---|
| Network Scanner | Yes | RFC1213-MIB |
| Port Scanner | No | None |
| System Explorer | Yes | RFC1213-MIB, HOST-RESOURCE-MIB |
| TCP Reset | Yes | RFC1213-MIB |
| System Details Update | Yes | RFC1213-MIB |

## SNMP Tools

| Tool | Is SNMP needed? | Required MIBs |
|---|---|---|
| MIB Browser | Yes | MIB to be specified by user |
| SNMP Walker | Yes | MIB to be specified by user |
| MIB Node Viewer | Yes | MIB to be specified by user |
| MIB Module Viewer | Yes | MIB to be specified by user |
| Community Checker | Yes | MIB to be specified by user |
| Trap Receiver | Yes | MIB to be specified by user |

## CISCO Tools

| Tool | Is SNMP needed? | Platform Series | Required MIBs |
|---|---|---|---|
| Device Scan | Yes | CISCO2500 series and above | RFC1213-MIB |
| Device Explorer | Yes | CISCO2500 series and above | RFC1213-MIB, OLD-CISCO-INTERFACES-MIB |