CISCO-LPTS-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2013-09-03

Category: Cisco Devices, IP and Core Protocols

Description: Manages Local Packet Transport Services (LPTS) policers and flow entries that protect the IOS-XR route processor.

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What Is CISCO-LPTS-MIB?

This is a Cisco proprietary MIB for Local Packet Transport Services (LPTS) on IOS-XR platforms, which protects the route processor from being overwhelmed by controlling and rate-limiting the flows of control-plane traffic (e.g., routing protocol, management) entering the system via policers. It exposes global and per-node/local flow tables showing each protocol flow's type, current policed rate, and (for local flows) whether packets were accepted or dropped. Its monitoring value is directly tied to route-processor and control-plane software health: watching clLocalAccepted alongside clLocalCurrentRate for a given flow reveals whether legitimate control-plane traffic (such as routing protocol packets) is being throttled by an overly aggressive policer, which could cause routing adjacency flaps or management-plane unresponsiveness. It is a Cisco IOS-XR-specific subsystem MIB with no dependency on external IETF standards noted. It is deployed on Cisco IOS-XR routers (e.g., NCS, ASR9000 series) where LPTS protects the control plane from packet floods or misbehaving flows. Engineers can download the CISCO-LPTS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-LPTS-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

Cisco IOS-XR router

Monitoring Examples

An administrator would poll clGlobalFlowTable/clGlobalFlowEntry to see the clGlobalCurrentRate policed for a given clGlobalFlowType, and check the corresponding clLocalFlowTable/clLocalFlowEntry on a specific clLocalNodeID to see clLocalAccepted counts versus the policer's clLocalCurrentRate. If a routing protocol's flow shows a low clLocalAccepted count relative to expected traffic while its policer rate appears saturated, that would indicate LPTS is dropping legitimate control-plane packets, potentially explaining observed routing instability on that IOS-XR node.

What Can Be Monitored

per-flow policed rate
per-node flow accepted packet count
flow type classification
global vs. local flow statistics

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter64
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using clLocalAccepted OID:

Select a Cisco IOS-XR router (LPTS) 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 clLocalAccepted 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. This object indicates the total number of packets accepted on a linecard for a specific flow. 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
ciscoLptsMIB	1.3.6.1.4.1.9.9.812			The MIB module for Local Packet Transport Services(LPTS) related information like the flows and the policer values related to various flows present in the system. The number of packets coming into the system is controlled by the policer values associated with the protocol. Each protocol is classified into different flows and a rate limit is associated with the flows. Policer is a numerical value controlling the number of packets entering the box. The flows represent individual, specific protocols. Flow types also represent the degree of trust for a given packet. Ex: BGP packets coming from established session is assigned one flow, packets from configured BGP peer are assigned different flow . Other BGP packets are assigned a third flow. Definitions: LPTS - Local Packet Transport Services. It is a network infrastructure subsystem that provides a common facility for transport of packets which are destined towards the router (for-us packets), to the exact applications. In addtion to that, it also provides policing of for-us packets FlowType - Represents individual, specific protocols. Flow also represents the degree of trust for a given packet. LC - Line Cards. Policer - Index to FlowType. CurrentRate - Number of packets allowed into the box in PPS (Packets Per Second). Type - Defines the scope of the flow applicable at a specific node or Line card. Precedence - Precedence is the selection mechanism for a specific Type if more than one Type is configured for the same flow. 'local' FlowType has higher precedence over 'global' and 'static' FlowTypes. 'global' FlowType has higher precedence over 'static' FlowType. nodeID - The line card for which the flow configuration is made.
ciscoLptsMIBNotifs	1.3.6.1.4.1.9.9.812.0
ciscoLptsMIBObjects	1.3.6.1.4.1.9.9.812.1
clGlobalFlowTable	1.3.6.1.4.1.9.9.812.1.1		not-accessible	This table respresents the flows configured globally and the configuration will be reflected across all the linecards
clGlobalFlowEntry	1.3.6.1.4.1.9.9.812.1.1.1		not-accessible	An entry will be added into clGlobalFlowTable when LPTS flows configured without any location specific details. Similarly when the global LPTS flow config is removed, then type and rate retained as per Static config file. The entries in this table can be of Type either 'global' or 'static'.
U32 clGlobalFlowIndex	1.3.6.1.4.1.9.9.812.1.1.1.1	Unsigned32	not-accessible	An unique value used to represent a row in the clGlobalFlowTable
STR clGlobalFlowType	1.3.6.1.4.1.9.9.812.1.1.1.2	SnmpAdminString	read-only	This object indicates the flow type name associated with every flow. Eg. FlowType could be BGP-Known, BGP-configured BGP-default.
CLF clGlobalType	1.3.6.1.4.1.9.9.812.1.1.1.3	ClFlowType	read-only	This object indicates an enumeration which indicates whether LPTS flow configured across all the linecards are 'global' or 'static' depending on the predecedence
U32 clGlobalCurrentRate	1.3.6.1.4.1.9.9.812.1.1.1.4	Unsigned32	read-write	This object specifies the rate associated with the flow type which is configured globally.
clLocalFlowTable	1.3.6.1.4.1.9.9.812.1.2		not-accessible	This table represents the configurations for the local flow types & affects a particular nodeID for which config is applied. When local flow type is not configured & we have a global configuration then the clLocalFlowTable has global flow value. If neither local flow nor the global flows are configured, then clLocalFlowTable will have static values derived from the config file. If both the local flow and global flow is configured, then the local flow information takes precedence over the global flow information.
clLocalFlowEntry	1.3.6.1.4.1.9.9.812.1.2.1		not-accessible	An entry in clLocalFlowTable will be added when LPTS flows are configured specific to a location. This table is indexed based on nodeID and clGlobalFlowIndex. When NMS polls for flow in clLocalFlowTable, the flow name is retrieved from the clGlobalFlowTable. When a local configuration is removed for a flow, then clGlobalCurrentRate will be applied if it is present, else static rate will be applied.
U32 clLocalNodeID	1.3.6.1.4.1.9.9.812.1.2.1.1	Unsigned32	not-accessible	The linecard for which the flow configuration is made.
CLF clLocalType	1.3.6.1.4.1.9.9.812.1.2.1.2	ClFlowType	read-only	This object indicates an enumeration which indicates LPTS flows configured specific to a linecard
U32 clLocalCurrentRate	1.3.6.1.4.1.9.9.812.1.2.1.3	Unsigned32	read-only	This object indicates the packet rate associated with the flow type with which packets are accepted or dropped specific to a linecard.
C64 clLocalAcceptedEx	1.3.6.1.4.1.9.9.812.1.2.1.4	Counter64	read-only	This object indicates the total number of packets accepted on a linecard for a specific flow.
C64 clLocalDropped	1.3.6.1.4.1.9.9.812.1.2.1.5	Counter64	read-only	This object indicates the total number of packets dropped on a linecard for a specific flow.
U32 clLocalTosValue	1.3.6.1.4.1.9.9.812.1.2.1.6	Unsigned32	read-only	This object indicates the type of service.
ciscoLptsMIBConform	1.3.6.1.4.1.9.9.812.2
ciscoLptsMIBCompliances	1.3.6.1.4.1.9.9.812.2.1
ciscoLptsMIBCompliance	1.3.6.1.4.1.9.9.812.2.1.1			The compliance statement for entities which implement the Cisco LPTS MIB.
ciscoLptsMIBGroups	1.3.6.1.4.1.9.9.812.2.2
clGlobalFlowGroup	1.3.6.1.4.1.9.9.812.2.2.1			A collection of objects which provides information about flow type and current rate configured across all Linecards.
clLocalFlowGroup	1.3.6.1.4.1.9.9.812.2.2.2			A collection of objects which provides information about current rate and accept/drop statistics for a specific linecard.

RFC description

Cisco vendor-private MIB for Local Packet Transport Services (LPTS) management and rate-limiting on IOS devices.

Start monitoring Cisco IOS-XR router (LPTS) 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 CISCO-LPTS-MIB