All MIBs › GW-MIB
Category: Device Management, Domain: WAN
Description: Gateway device MIB providing common management objects for network gateway status and traffic statistics.
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What Is GW-MIB?
This is a private MIB, organized under "usr"/"nas"/"gw" object subtrees suggestive of a Network Access Server or dial/broadband gateway implementation, modeling generic network-gateway status monitoring and connectivity fault detection. It exposes a gateway-tracking table (gwTeTable) keyed by index, recording each monitored gateway's IP address along with failure and restoration state for both the primary network path and an associated alternate-route path. Its core monitoring value is fault detection on upstream connectivity — the gwTegwNetworkFailed/gwTegwNetworkRestored and gwTeArNetFailed/gwTeArNetRestored objects let an administrator see whether a given gateway or its backup route has gone down or recovered, a hardware/network-availability status signal. It appears to build on a base enterprise MIB subtree providing the gateway (gw) and network-access-server (nas) branches it is organized under. It is deployed on network-access-server or dial/broadband aggregation gateway devices where uplink or default-gateway reachability needs to be tracked and alarmed on, and administrators can download the GW-MIB file to load it into their MIB browser.
IPNetwork Monitor allows you to monitor SNMP objects defined in GW-MIB. 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
- U.S. Robotics network access server/gateway (uplink failure detection) — Enterprise OID 429 resolves to usr (U.S. Robotics), previously only hinted at via the 'usr' object-subtree name without being named directly.
Monitoring Examples
An administrator would poll gwTeTable/gwTeEntry, indexed by gwTeIndex, to read gwTegwIPAddress for each monitored gateway and watch the gwTegwNetworkFailed and gwTegwNetworkRestored objects (and their gwTeArNetFailed/gwTeArNetRestored counterparts for an alternate route) to detect when a gateway path goes down or comes back up. A gwTegwNetworkFailed transition with no matching gwTegwNetworkRestored would indicate an ongoing outage on that gateway's uplink, prompting investigation of the associated IP address.
What Can Be Monitored
- gateway IP address
- network failure/restoration status per gateway
- alternate-route failure/restoration status
Imported Objects
From RFC-1212
| OBJECT-TYPE |
From RFC1155-SMI
| Counter | |
| Gauge | |
| IpAddress | |
| TimeTicks | |
| enterprises | |
| experimental |
From RFC1213-MIB
| DisplayString |
OIDs
RFC description
3Com gateway card trap enable configuration and network failure detection.
Start monitoring U.S. Robotics network access server/gateway (uplink failure detection) 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.