FOUNDRY-VLAN-CAR-MIB

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Organization: Brocade Communications Systems, Inc.

Last Updated: 2010-06-02

Category: Quality of Service, Vendor: Foundry/Brocade

Description: Brocade Foundry VLAN CAR MIB providing per-VLAN committed access rate traffic policing configuration and rate statistics on FastIron switches.

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What Is FOUNDRY-VLAN-CAR-MIB?

FOUNDRY-VLAN-CAR-MIB is a Brocade Communications Systems, Inc. (Foundry Networks heritage) proprietary MIB implementing per-VLAN Committed Access Rate (CAR) traffic policing. Its CAR table, keyed by VLAN/direction/row-index, records rule type, access-list index, rate, normal/extended burst limit, conform/exceed action, and statistics for switched/filtered packets and bytes plus current burst size. As a configuration/performance MIB it lets an administrator confirm a VLAN's CAR rate-limit and watch how many packets are being conformed vs. filtered. It is deployed on Brocade (Foundry Networks) switches/routers. Engineers can download the FOUNDRY-VLAN-CAR-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in FOUNDRY-VLAN-CAR-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

Brocade (Foundry Networks) switches/routers

Monitoring Examples

An administrator checks snVLanCARStatFilteredPkts against snVLanCARRate to confirm a VLAN's CAR rate limit is appropriately sized on a Brocade (Foundry) switch.

What Can Be Monitored

per-VLAN CAR rate-limit configuration and conform/exceed statistics

Imported Objects

From FOUNDRY-CAR-MIB

PacketSource
RateLimitAction
RateLimitType

From FOUNDRY-SN-SWITCH-GROUP-MIB

snSwitch

MODULE-IDENTITY

From SNMPv2-SMI

Counter64
Gauge32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

How to Use in IPNetwork Monitor

Example using snVLanCARStatSwitchedPkts OID:

Select a Brocade/Foundry switch/router (per-VLAN Committed Access Rate policing) 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 snVLanCARStatSwitchedPkts 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. The counter of packets permitted by this rate limit. 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 Counter64-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
snVLanCAR	1.3.6.1.4.1.1991.1.1.3.17			Copyright 1996-2010 Brocade Communications Systems, Inc. All rights reserved. This Brocade Communications Systems SNMP Management Information Base Specification embodies Brocade Communications Systems' confidential and proprietary intellectual property. Brocade Communications Systems retains all title and ownership in the Specification, including any revisions. This Specification is supplied AS IS, and Brocade Communications Systems makes no warranty, either express or implied, as to the use, operation, condition, or performance of the specification, and any unintended consequence it may on the user environment.
snVLanCARs	1.3.6.1.4.1.1991.1.1.3.17.1
snVLanCARTable	1.3.6.1.4.1.1991.1.1.3.17.1.1		not-accessible	A table of rate limit configuration entries for a vlan. Rate Limit is a method of traffic control. It allows a set of rate limits to be configured and applied to packets flowing into/out of an interface to regulate network traffic.
snVLanCAREntry	1.3.6.1.4.1.1991.1.1.3.17.1.1.1		not-accessible	A collection of rate-limit configuration objects on this vlan.
INT snVLanCARVLanId	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.1	INTEGER	read-only	The VLAN ID as one of the indices of this table . Each VLAN ID can have a membership of multiple ports.
PAC snVLanCARDirection	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.2	PacketSource	read-only	The input or output transmission direction for the Rate Limit object.
INT snVLanCARRowIndex	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.3	INTEGER	read-only	The table index for rate limit objects. It increases as the rate limit entries are added. Skips the number when a row is deleted.
RAT snVLanCARType	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.4	RateLimitType	read-only	The type of traffic rate-limited against.
I32 snVLanCARAccIdx	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.5	Integer32	read-only	The index to the access list if RateLimitType is either quickAcc or standardAcc.
I32 snVLanCARRate	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.6	Integer32	read-only	The comitted access rate. This determines the long term average transmission rate. Traffic that falls under this rate always conforms. This is average rate in bits per second.
I32 snVLanCARLimit	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.7	Integer32	read-only	This is the normal burst size that determines how large traffic bursts can be before some traffic exceeds the rate limit. This specifies the number of bytes that are guaranteed to be transported by the network at the average rate under normal conditions during committed time interval. This normal burst size is in bytes.
I32 snVLanCARExtLimit	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.8	Integer32	read-only	This is the extended burst limit that determines how large traffic bursts can be before all the traffic exceeds the rate limit. This burst size is in bytes.
RAT snVLanCARConformAction	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.9	RateLimitAction	read-only	Action to be taken when the traffic is within the Rate Limit. drop drop the packet. xmit transmit the packet. continue continue to evaluate to the subsequent rate limits. precedXmit rewrite the IP precedence and transmit the packet. precedCont rewrite the IP precedence and allow it evaluated by subsequent rate limits.
RAT snVLanCARExceedAction	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.10	RateLimitAction	read-only	Action to be taken when the traffic exceeds the Rate Limit. drop drop the packet. xmit transmit the packet. continue continue to evaluate to the subsequent rate limits. precedXmit rewrite the IP precedence and transmit the packet. precedCont rewrite the IP precedence and allow it evaluated by subsequent rate limits.
C64 snVLanCARStatSwitchedPktsEx	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.11	Counter64	read-only	The counter of packets permitted by this rate limit.
C64 snVLanCARStatSwitchedBytes	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.12	Counter64	read-only	The counter of bytes permitted by this interface.
C64 snVLanCARStatFilteredPkts	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.13	Counter64	read-only	The counter of packets which exceeded this rate limit.
C64 snVLanCARStatFilteredBytes	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.14	Counter64	read-only	The counter of bytes which exceeded this rate limit.
G32 snVLanCARStatCurBurst	1.3.6.1.4.1.1991.1.1.3.17.1.1.1.15	Gauge32	read-only	The current received burst size.

RFC description

A Brocade/Foundry MIB for managing VLAN and Committed Access Rate (CAR) traffic policing functionality on Brocade switches. This MIB provides objects for VLAN configuration, rate limiting counters, and traffic control on Foundry/Brocade devices.

Start monitoring Brocade/Foundry switch/router (per-VLAN Committed Access Rate policing) 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 FOUNDRY-VLAN-CAR-MIB