ARISTA-FIB-STATS-MIB

All MIBs › ARISTA-FIB-STATS-MIB

Organization: Arista Networks, Inc.

Last Updated: 2017-05-19

Category: Vendor: Arista

Description: Arista EOS forwarding information base statistics including route and adjacency counts.

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock status) 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.

What Is ARISTA-FIB-STATS-MIB?

ARISTA-FIB-STATS-MIB is an Arista Networks EOS MIB that reports statistics about the device's Forwarding Information Base (FIB), the data-plane routing table built from BGP, OSPF, static routes, and other sources on Arista switches/routers. It exposes route-count summaries broken down by address family, route type (e.g. static, BGP, OSPF), and prefix length, giving a structured view of how many routes are active in the forwarding plane. This is primarily a routing/performance-health MIB: unusually low or dropping total route counts can indicate a routing protocol failure, a lost BGP/OSPF adjacency, or FIB programming problems, while excessive route counts by prefix length can flag a route-table scaling issue. It is closely tied to standard routing protocol MIBs (BGP4-MIB, OSPF-MIB) since the FIB it reports on is populated by those protocols. It is deployed on Arista EOS switches and routers acting as core or edge routers in data center and campus networks. Engineers can download the ARISTA-FIB-STATS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ARISTA-FIB-STATS-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

Arista EOS routers/switches

Monitoring Examples

A network operations team would poll aristaFIBStatsSummaryTable/aristaFIBStatsSummaryEntry for aristaFIBStatsTotalRoutes per aristaFIBStatsAF (address family) to baseline expected route-table size, alerting if the count drops sharply, which typically signals a routing peer going down. aristaFIBStatsByRouteTypeTable lets an admin break down aristaFIBStatsTotalRoutesForRouteType by aristaFIBStatsRouteType (e.g. connected, static, BGP) to see which protocol lost routes. aristaFIBStatsByPrefixLenTable's aristaFIBStatsTotalRoutesForPrefixLen by aristaFIBStatsPrefixLen can reveal an anomalous influx of very specific host routes consuming FIB capacity.

What Can Be Monitored

total FIB routes by address family
route counts by route type
route counts by prefix length

Imported Objects

From ARISTA-SMI-MIB

aristaMibs

OBJECT-IDENTITY

From INET-ADDRESS-MIB

InetAddressPrefixLength
InetVersion

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Gauge32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using aristaFIBStatsTotalRoutes OID:

Select an Arista Networks EOS switch as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type aristaFIBStatsTotalRoutes into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. Indicates the total number of routes active in the FIB for the specified address family. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Gauge32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
aristaFIBStatsMIB	1.3.6.1.4.1.30065.3.23			Arista devices that function as a router support various dynamic routing protocols like BGP, OSPF. Customers can configure local or static routes as well. The routing subsystem is responsible for creating the forwarding information base (FIB) from routing information received by customer configuration or dynamic routing protocols. The FIB has the complete details about all the routes that are active in the system and will be used for data forwarding. In the context of this MIB, we specifically refer to the unicast FIB. This MIB provides useful statistics about the FIB. Arista devices support routing function for IPv4 and IPv6 address families. Arista devices also support the concept of virtual routing and forwarding (VRF), with a single device providing multiple routing instances. This allows customers to isolate network traffic and use overlapping addresses. A VRF instance is identified by a customer configured string. Arista devices maintain independent FIB for each address family and VRF instance. This MIB provides access to FIB summary of all address families within a specific VRF instance. Network Management Stations can obtain FIB summary for every VRF instance by specifying the VRF instance as a context, when using SNMPv3; or by including the VRF instance in the community string (format is @) when using SNMPv2.
aristaFIBStatsMibObjects	1.3.6.1.4.1.30065.3.23.1
aristaFIBStatsSummaryTable	1.3.6.1.4.1.30065.3.23.1.1		not-accessible	This table contains overall FIB statistics for each address family.
aristaFIBStatsSummaryEntry	1.3.6.1.4.1.30065.3.23.1.1.1		not-accessible	A conceptual row that contains overall FIB statistics for a specific address family. A conceptual row is available only for supported address families.
INE aristaFIBStatsAF	1.3.6.1.4.1.30065.3.23.1.1.1.1	InetVersion	not-accessible	Indicates the IP version of this row.
G32 aristaFIBStatsTotalRoutesEx	1.3.6.1.4.1.30065.3.23.1.1.1.2	Gauge32	read-only	Indicates the total number of routes active in the FIB for the specified address family.
aristaFIBStatsByRouteTypeTable	1.3.6.1.4.1.30065.3.23.1.2		not-accessible	This table contains FIB statistics for each address family and route type. Every entry in the FIB may have been contributed by a specific route type. This table provides statistics for various route types that contribute to the FIB.
aristaFIBStatsByRouteTypeEntry	1.3.6.1.4.1.30065.3.23.1.2.1		not-accessible	A conceptual row that contains FIB statistics for a specific address family and route type. A conceptual row is available only for supported address families and contributing route type. If no entry exists in the FIB for a specific route type, the corresponding conceptual row may not be available.
ROU aristaFIBStatsRouteType	1.3.6.1.4.1.30065.3.23.1.2.1.1	RouteType	not-accessible	The route type that corresponds to this conceptual row.
G32 aristaFIBStatsTotalRoutesForRouteType	1.3.6.1.4.1.30065.3.23.1.2.1.2	Gauge32	read-only	Indicates the total number of routes active in the FIB for the specified address family and route type.
aristaFIBStatsByPrefixLenTable	1.3.6.1.4.1.30065.3.23.1.3		not-accessible	Each route entry present in the FIB has an associated prefix length. This table contains FIB statistics for each address family and prefix length.
aristaFIBStatsByPrefixLenEntry	1.3.6.1.4.1.30065.3.23.1.3.1		not-accessible	A conceptual row that contains FIB statistics for a specific address family and prefix length. A conceptual row is available only for supported address families and contributing prefix lengths.
ADR aristaFIBStatsPrefixLen	1.3.6.1.4.1.30065.3.23.1.3.1.1	InetAddressPrefixLength	not-accessible	The prefix length that corresponds to this conceptual row.
G32 aristaFIBStatsTotalRoutesForPrefixLen	1.3.6.1.4.1.30065.3.23.1.3.1.2	Gauge32	read-only	Indicates the total number of routes active in the FIB for the specified address family and specific prefix length.
aristaFIBStatsMibConformance	1.3.6.1.4.1.30065.3.23.2
aristaFIBStatsMibCompliances	1.3.6.1.4.1.30065.3.23.2.1
aristaFIBStatsMibCompliance	1.3.6.1.4.1.30065.3.23.2.1.1			The compliance statement for Arista switches that implement the ARISTA-FIB-STATS-MIB.
aristaFIBStatsMibGroups	1.3.6.1.4.1.30065.3.23.2.2
aristaFIBStatsGroup	1.3.6.1.4.1.30065.3.23.2.2.1			The collection of objects that provide relevant FIB statistics for specific VRF instance.

RFC description

Provides forwarding information base statistics for IPv4/IPv6 routes across virtual routing instances.

Start monitoring Arista Networks EOS switches 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.

Download ARISTA-FIB-STATS-MIB