All MIBs › RADLAN-UDP
Organization: Radlan Computer Communications Ltd.
Last Updated: 2004-06-01
Category: System Management, Vendor: RADLAN/Cisco SB
Description: Manages UDP relay and helper-address configuration for forwarding broadcast UDP packets.
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What Is RADLAN-UDP?
RADLAN-UDP (RND UDP MIB) is a Marvell/RADLAN private enterprise MIB that configures UDP broadcast forwarding/helper-address relay on RADLAN-based switches, similar in purpose to Cisco's ip helper-address feature, used to forward broadcast UDP services such as DHCP across subnet boundaries. It exposes a relay table where each entry defines a destination UDP port, the source IP interface, the destination IP address to relay to, and a row status plus free-form user information. This is a Layer 3 forwarding configuration MIB rather than a performance or hardware MIB: it confirms broadcast relay rules (e.g., for DHCP) are correctly configured and active, and a missing or disabled relay entry directly explains clients on a VLAN failing to reach a DHCP or other broadcast-dependent server on a different subnet. It has no apparent dependency on other standard MIBs, being a self-contained RADLAN routing extension. It is typically deployed on RADLAN-based Layer 3 switches acting as default gateway for VLANs needing broadcast services relayed to a remote server. Engineers can download the RADLAN-UDP file directly to load it into their MIB browser.
IPNetwork Monitor allows you to monitor SNMP objects defined in RADLAN-UDP. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.
Supported Devices
- Marvell/RADLAN-based Layer 3 switch/router
- OEM routing switches licensing the RADLAN software stack
Monitoring Examples
An administrator troubleshooting clients that can't obtain a DHCP lease across a routed VLAN would check rsUdpRelayTable/rsUdpRelayEntry for an entry with rsUdpRelayDstPort 67, confirming rsUdpRelaySrcIpInf matches the client VLAN's interface and rsUdpRelayDstIpAddr points to the correct DHCP server, and that rsUdpRelayStatus shows the entry active. A missing entry or one left in a non-active row status directly explains why broadcast DHCP discover packets never reach the server. rsUdpRelayUserInfo often holds an admin-supplied label identifying the entry's purpose.
What Can Be Monitored
- UDP relay/helper-address entries
- relay destination port
- relay source interface
- relay destination IP address
- relay entry active/row status
Imported Objects
From IP-FORWARD-MIB
| ipCidrRouteDest | OBJECT-TYPE |
| ipCidrRouteEntry | OBJECT-TYPE |
| ipCidrRouteMask | OBJECT-TYPE |
| ipCidrRouteNextHop | OBJECT-TYPE |
| ipCidrRouteTos | OBJECT-TYPE |
From IP-MIB
| ipAddrEntry | OBJECT-TYPE |
From RADLAN-MIB
| rnd | OBJECT-IDENTITY |
From RFC1389-MIB
| rip2IfConfEntry | OBJECT-TYPE |
From SNMPv2-SMI
| Counter32 | |
| Integer32 | |
| IpAddress | |
| MODULE-IDENTITY | |
| OBJECT-TYPE | |
| Unsigned32 |
From SNMPv2-TC
| RowStatus | |
| TEXTUAL-CONVENTION | |
| TruthValue |
From SNMPv2-TC-v1
| DisplayString |
OIDs
RFC description
Manages UDP relay configuration and forwarding policies for network traffic redirection.
Start monitoring Marvell/RADLAN-based Layer 3 switch/router, OEM routing switches (UDP broadcast relay/helper address) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.