Cisco IOS XR Netflow Configuration Guide for the Cisco CRS Router
Configuring NetFlow on Cisco IOS XR Software
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Configuring NetFlow on Cisco IOS XR Software

Table Of Contents

Configuring NetFlow on Cisco IOS XR Software

Contents

Prerequisites for Configuring NetFlow

Restrictions for Configuring NetFlow

Information About Configuring NetFlow

NetFlow Overview

Monitor Map Overview

Sampler Map Overview

Exporter Map Overview

NetFlow Configuration Submodes

Flow Exporter Map Configuration Submode

Flow Exporter Map Version Configuration Submode

Flow Monitor Map Configuration Submode

Sampler Map Configuration Submode

Enabling the NetFlow BGP Data Export Function

MPLS Flow Monitor with IPv4 and IPv6 Support

MPLS Cache Reorganization to Support Both IPv4 and IPv6

MPLS Packets with IPv6 Flows

Destination-based NetFlow Accounting

How to Configure NetFlow on Cisco IOS XR Software

Configuring an Exporter Map

Configuring a Sampler Map

Configuring a Monitor Map

Applying a Monitor Map and a Sampler Map to an Interface

Clearing NetFlow Data

Configuring NetFlow Collection of MPLS Packets with IPv6 Fields

Configuring Destination-based NetFlow Accounting

Configuration Examples for NetFlow

Sampler Map: Example

Exporter Map: Example

Flow Monitor Map: Examples

MPLS Flow Monitor with IPv4 and IPv6 Support: Examples

Destination-based NetFlow Accounting: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance


Configuring NetFlow on Cisco IOS XR Software


This module describes the configuration of NetFlow on theCisco CRS-1 Router.

A NetFlow flow is a unidirectional sequence of packets that arrive on a single interface (or subinterface), and have the same values for key fields.

NetFlow is useful for the following:

Accounting/BillingNetFlow data provides fine grained metering for highly flexible and detailed resource utilization accounting.

Network Planning and AnalysisNetFlow data provides key information for strategic network planning.

Network MonitoringNetFlow data enables near real-time network monitoring capabilities.

Feature History for Configuring NetFlow on Cisco IOS XR Software

Release
Modification

Release 3.2

This feature was introduced.

Release 3.3.0

Information was added about using the bgp attribute-download command to enable the NetFlow BGP data export function.

NetFlow support for subinterfaces was introduced.

Release 3.3.1

Support for Multiprotocol Label Switching (MPLS)-aware NetFlow was introduced.

The mpls keyword was added to the flow command to support MPLS-aware NetFlow.

The mpls keyword was added to the record command to support MPLS-aware NetFlow.

Release 3.4.0

The following commands were moved to flow exporter map configuration mode:

destination

dscp

source

transport udp

NetFlow was updated so that a single flow monitor map supports up to 8 exporters.

NetFlow was updated so that users could specify the number of MPLS labels to use as keys.

Release 3.4.1

The record mpls field was introduced in the show command output from the Cisco CRS-1 Router.

Release 3.5.0

The record ipv6 command was introduced.

Support for IPv6 aware NetFlow.

Release 3.7.0

Destination-based NetFlow accounting was supported.

Release 4.0.1

The following features were added:

Destination-based NetFlow Accounting.

Reporting BGP attributes for VRF prefixes in Sampled Netflow.


Contents

This module includes the following sections:

Prerequisites for Configuring NetFlow

Restrictions for Configuring NetFlow

Information About Configuring NetFlow

How to Configure NetFlow on Cisco IOS XR Software

Additional References

RFCs

Prerequisites for Configuring NetFlow

To perform these configuration tasks, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.

Restrictions for Configuring NetFlow

Consider the following restrictions when configuring NetFlow in Cisco IOS XR software:

When the Netflow router is configured at the tail-end of the PW tunnel, the Netflow ingress is unable to record the PW traffic in the cache. This behavior is because of the egress microcode limitation for L2VPN which cannot handle the Netflow start offset packets. The egress microcode disables the ingress Netflow processing for the SNF ingress start offset packets and hence these packets are not included in the Netflow statistics.


Note In IOS XR, Netflow implementation happens using fast path.


You must configure a source interface. If you do not configure a source interface, the exporter will remain in a disabled state.

Cisco IOS XR software supports export format Version 9 only.

You must configure a valid record map name for every flow monitor map.


Tip We recommend that you do not use the management interface to export NetFlow packets. Exporting the management interface does not work efficiently.


Information About Configuring NetFlow

To implement NetFlow, you must understand the following concepts:

NetFlow Overview

Monitor Map Overview

Sampler Map Overview

Exporter Map Overview

NetFlow Configuration Submodes

MPLS Flow Monitor with IPv4 and IPv6 Support

Destination-based NetFlow Accounting

NetFlow Overview

A flow is exported as part of a NetFlow export User Datagram Protocol (UDP) datagram under the following circumstances:

The flow has been inactive or active for too long.

The flow cache is getting full.

One of the counters (packets and or bytes) has wrapped.

The user forces the flow to export.

NetFlow export UDP datagrams are sent to an external flow collector device that provides NetFlow export data filtering and aggregation. The export of data consists of expired flows and control information.

The NetFlow infrastructure is based on the configuration and use of the following maps:

Monitor map

Sampler map

Exporter map

These maps are described in the sections that follow.

Monitor Map Overview

A monitor map contains name references to the flow record map and flow exporter map. Monitor maps are applied to an interface. You can configure the following monitor map attributes:

Number of entries in the flow cache

Type of cache (permanent or normal). Permanent caches do not have their entries removed from the cache unless they are explicitly cleared by the user

Active flow timeout

Inactive flow timeout

Update timeout

Default timeouts

Record type of packets sampled and collected


Note The record name specifies the type of packets that NetFlow samples as they pass through the router. Currently, MPLS, IPv4, and IPv6 packet sampling is supported.



Note The active flow and inactive flow timeouts are associated with a normal cache type. The update timeout is associated with the permanent cache type.


Sampler Map Overview

The sampler map specifies the rate at which packets (one out of n packets) are sampled. On high bandwidth interfaces, applying NetFlow processing to every single packet can result in significant CPU utilization. Sampler map configuration is typically geared towards such high speed interfaces.

If NetFlow is applied in both directions, then the flow record packets are policed at the rate of 35,000 packets per second per direction on the Cisco CRS-1 Router. If NetFlow is applied in one direction only, then the flow record packets are policed at the rate of 70,000 packets per second per direction on the Cisco CRS-1 Router.


Note These values are for MSC-Rev. A line cards. MSC-Rev. B line cards for a Cisco CRS-1 Router have a higher policing rate of 62,500 packets per second per direction, with 125,000 packets per second applied in a single direction.


Exporter Map Overview

An exporter map contains user network specification and transport layer details for the NetFlow export packet. The flow exporter-map command allows you to configure collector and version attributes. You can configure the following collector information:

Export destination IP address

DSCP value for export packet

Source interface

UDP port number (This is where the collector is listening for NetFlow packets.)

Transport protocol for export packets


Note In Cisco IOS XR software, UDP is the only supported transport protocol for export packets.



Note NetFlow export packets use the IP address that is assigned to the source interface. If the source interface does not have an IP address assigned to it, the exporter will be inactive.


You can also configure the following export version attributes:

Template timeout

Template data timeout

Template options timeout

Interface table timeout

Sampler table timeout


Note A single flow monitor map can support up to eight exporters.


NetFlow Configuration Submodes

In Cisco IOS XR, NetFlow map configuration takes place in map-specific submodes. Cisco IOS XR supports the following NetFlow map configuration submodes:

Flow Exporter Map Configuration Submode

Flow Exporter Map Version Configuration Submode

Flow Monitor Map Configuration Submode

Sampler Map Configuration Submode


Tip The Cisco IOS XR software allows you to issue most commands available under submodes as one single command string from global configuration mode. For example, you can issue the record ipv4 command from the flow monitor map configuration submode as follows:

RP/0/RP0/CPU0:router(config)# flow monitor-map fmm
RP/0/RP0/CPU0:router(config-fmm)# record ipv4

Alternatively, you can issue the same command from global configuration mode, as shown in the following example:

RP/0/RP0/CPU0:router(config)# flow monitor-map fmm record ipv4


Flow Exporter Map Configuration Submode

When you issue the flow exporter-map fem-name command in global configuration mode, the command-line interface (CLI) prompt changes to "config-fem," indicating that you have entered the flow exporter map configuration submode.

In the following sample output, the question mark (?) online help function displays all the commands available under the flow exporter map configuration submode:

RP/0/RP0/CPU0:router(config)# flow exporter-map fem

RP/0/RP0/CPU0:router(config-fem)# ?

clear        Clear the uncommitted configuration
clear        Clear the configuration
commit       Commit the configuration changes to running
describe     Describe a command without taking real actions
destination  Export destination configuration
do           Run an exec command
dscp         Specify DSCP value for export packets
exit         Exit from this submode
no           Negate a command or set its defaults
pwd          Commands used to reach current submode
root         Exit to the global configuration mode
show         Show contents of configuration
source       Source interface
transport    Specify the transport protocol for export packets
version      Specify export version parameters

Note If you enter the version command, you enter the flow exporter map version configuration submode.



Note A single flow monitor map can support up to eight exporters.


Flow Exporter Map Version Configuration Submode

When you issue the version v9 command in the flow exporter map configuration submode, the CLI prompt changes to "config-fem-ver," indicating that you have entered the flow exporter map version configuration submode.

In the following sample output, the question mark (?) online help function displays all the commands available under the flow exporter map version configuration submode:

RP/0/RP0/CPU0:router(config-fem)# version v9

RP/0/RP0/CPU0:router(config-fem-ver)# ?

commit    Commit the configuration changes to running
describe  Describe a command without taking real actions
do        Run an exec command
exit      Exit from this submode
no        Negate a command or set its defaults
options   Specify export of options template
show      Show contents of configuration
template  Specify template export parameters

Flow Monitor Map Configuration Submode

When you issue the flow monitor-map map_name command in global configuration mode, the CLI prompt changes to "config-fmm," indicating that you have entered the flow monitor map configuration submode.

In the following sample output, the question mark (?) online help function displays all the commands available under the flow monitor map configuration submode:

RP/0/RP0/CPU0:router(config)# flow monitor-map fmm

RP/0/RP0/CPU0:router(config-fmm)# ?

cache     Specify flow cache attributes
commit    Commit the configuration changes to running
describe  Describe a command without taking real actions
do        Run an exec command
exit      Exit from this submode
exporter  Specify flow exporter map name
no        Negate a command or set its defaults
record    Specify a flow record map name
show      Show contents of configuration

RP/0/RP0/CPU0:router(config-fmm)#

Sampler Map Configuration Submode

When you issue the sampler-map map_name command in global configuration mode, the CLI prompt changes to "config-sm," indicating that you have entered the sampler map configuration submode.

In the following sample output, the question mark (?) online help function displays all the commands available under the sampler map configuration submode:

RP/0/RP0/CPU0(config)# sampler-map fmm

RP/0/RP0/CPU0:router(config-sm)# ?
clear     Clear the uncommitted configuration
clear     Clear the configuration
commit    Commit the configuration changes to running
describe  Describe a command without taking real actions
do        Run an exec command
exit      Exit from this submode
no        Negate a command or set its defaults
pwd       Commands used to reach current submode
random    Use random mode for sampling packets
root      Exit to the global configuration mode
show      Show contents of configuration
RP/0/RP0/CPU0(config-sm)#RP/0/RP0/CP0:router(config-sm)#

Enabling the NetFlow BGP Data Export Function

Use the bgp attribute-download command to enable NetFlow BGP routing attribute collection. The routing attributes are then exported. When no routing attributes are collected, zeroes (0) are exported.

When BGP attribute download is enabled, BGP downloads the attribute information for prefixes (community, extended community, and as-path) to the Routing Information Base (RIB) and Forwarding Information Base (FIB). This enables FIB to associate the prefixes with attributes and send the NetFlow statistics along with the associated attributes.

MPLS Flow Monitor with IPv4 and IPv6 Support

Cisco IOS XR Software Release  supports the NetFlow collection of MPLS packets. It also supports the NetFlow collection of MPLS packets carrying IPv4, IPv6, or both IPv4 and IPv6 payloads.

MPLS Cache Reorganization to Support Both IPv4 and IPv6

In Cisco IOS XR Software Release , at a time, you can have only one MPLS flow monitor running on an interface. If you apply an additional MPLS flow monitor to the interface, the new flow monitor overwrites the existing one.

At a time, you can apply only one flow monitor on an interface per direction. You can apply either the same flow monitor to an interface in both directions, or each direction can have its own flow monitor.

You can configure the MPLS flow monitor to collect IPv4 fields, IPv6 fields, or IPv4-IPv6 fields. IPv4-IPv6 configuration collects both IPv4 and IPv6 addresses using one MPLS flow monitor. IPv4 configuration collects only IPv4 addresses. IPv6 configuration collects only IPv6 addresses.

The MPLS flow monitor supports up to 1,000,000 cache entries. NetFlow entries include the following types of fields:

IPv4 fields

IPv6 fields

MPLS with IPv4 fields

MPLS with IPv6 fields

The maximum number of bytes per NetFlow cache entry is as follows:

IPv4-88 bytes per entry

MPLS-88 bytes per entry

IPv6-108 bytes per entry

MPLS with IPv4 fields-108 bytes per entry

MPLS with IPv6 fields-128 bytes per entry


Note The different types of NetFlow entries are stored in separate caches. Consequently, the number of NetFlow entries on a line card can significantly impact the amount of available memory on the line card. Also, even though the sampling rate for IPv6 is the same as the sampling rate for IPv4, the CPU utilization for IPv6 is higher due to the longer keys used by the IPv6 fields.


MPLS Packets with IPv6 Flows

The collection of IPv6 flows in MPLS packets is an option. The CPU uses 128 bytes for each IPv6 field. IPv6 flows may contain the following types of information:

Source IP address

Destination IP address

Traffic class value

Layer 4 protocol number

Layer 4 source port number

Layer 4 destination port number

Flow ID

Header option mask

To collect the IPv6 fields in MPLS packets, you must activate the MPLS record type, ipv6-fields by running the record mpls ipv6-fields command. You can also specify the number of labels to be used for aggregation with this command.

Destination-based NetFlow Accounting

Destination-based NetFlow accounting is a usage-based billing application that tracks and records traffic according to its destination and enables service providers to do destination-specific accounting and billing. The destination-based NetFlow accounting record includes the destination peer autonomous system (AS) number and the BGP next-hop IP address.

In destination-based NetFlow accounting, the following fields are collected and exported:

Destination peer AS number

BGP next-hop IP address

Ingress interface

Egress interface

Forwarding status

EXP bits of the top label that is pushed in

Direction of the flow (always ingress in this case)

Destination-based NetFlow accounting supports the following features on the Cisco IOS XR Software Release :

Supports only IPv4 addresses

Supports configuration on physical interfaces, bundle interfaces, and logical subinterfaces

Supports IPv4 unicast and multicast traffic

Supports only ingress traffic

Supports only full mode NetFlow

Supports NetFlow export format Version 9 over User Datagram Protocols (UDPs)

Destination-based NetFlow accounting does not support the following features Cisco IOS XR Software Release :

Does not support IPv6 addresses

Does not support MPLS IPv6

Does not support configuration for individual Modular QoS Command-Line Interface (MQC) classes

Does not support the simultaneous configuration of destination-based NetFlow accounting with IPv4 sampled NetFlow on the same interface, in the same direction.

Does not support Layer 2 switched MPLS traffic

Does not support egress traffic

Does not support sampled mode NetFlow

Does not support NetFlow export formats version 5, version 8, IP Flow Information Export (IPFIX), or Stream Control Transmission Protocol (SCTP).

How to Configure NetFlow on Cisco IOS XR Software

The steps that follow provide a general overview of NetFlow configuration:


Step 1 Create and configure an exporter map.

Step 2 Create and configure a monitor map and a sampler map.


Note The monitor map must reference the exporter map you created in Step 1. If you do not apply an exporter-map to the monitor-map, the flow records are not exported, and aging is done according to the cache parameters specified in the monitor-map.


Step 3 Apply the monitor map and sampler map to an interface.

These steps are described in detail in the following sections:

Configuring an Exporter Map

Configuring a Sampler Map

Configuring a Monitor Map

Applying a Monitor Map and a Sampler Map to an Interface

Clearing NetFlow Data

Configuring NetFlow Collection of MPLS Packets with IPv6 Fields

Configuring Destination-based NetFlow Accounting

Configuring an Exporter Map

Configure an exporter map and apply it to the monitor map with the flow monitor-map map_name exporter map_name command. You can configure the exporter map prior to configuring the monitor map, or you can configure the monitor map first and then configure and apply an exporter map later on.


Note Cisco IOS XR software supports the configuration of a single collector only in the exporter map.


The steps that follow describe how to create and configure an exporter map.

SUMMARY STEPS

1. configure

2. flow exporter-map map_name

3. destination hostname_or_IP_address

4. dscp dscp_value

5. source type interface-path-id

6. transport udp port

7. version v9

8. options {interface-table | sampler-table} [timeout seconds]

9. template [data | options] timeout seconds

10. end
or
commit

11. exit

12. exit

13. show flow exporter-map map_name

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

flow exporter-map map_name

Example:
RP/0/RP0/CPU0:router(config)# flow exporter-map 
fem

Creates an exporter map, configures the exporter map name, and enters flow exporter map configuration mode.

Step 3 

destination hostname_or_IP_address
Example:
RP/0/RP0/CPU0:router(config-fem)# destination 
nnn.nnn.nnn.nnn

Configures the export destination for the flow exporter map. The destination can be a hostname or an IP address.

Step 4 

dscp dscp_value 
Example:
RP/0/RP0/CPU0:router(config-fem)# dscp 55

(Optional) Specifies the differentiated services codepoint (DSCP) value for export packets. Replace the dscp_value argument with a value in the range from 0 through 63.

Step 5 

source type interface-path-id
Example:
RP/0/RP0/CPU0:router(config-fem)# source 
gigabitEthernet 0/0/0/0

Specifies a source interface, in the format type interface-path-id.

Step 6 

transport udp port
Example:
RP/0/RP0/CPU0:router(config-fem)# transport udp 
9991

(Optional) Specifies the destination port for UDP packets. Replace port with the destination UDP port value, in the range from 1024 through 65535.

Step 7 

version v9
Example:
RP/0/RP0/CPU0:router(config-fem-ver)# version 
v9

(Optional) Enters flow exporter map version configuration submode.

Step 8 

options {interface-table | sampler-table} 
[timeout seconds]
Example:
RP/0/RP0/CPU0:router(config-fem-ver)# options 
sampler-table timeout 2000

(Optional) Configures the export timeout value for the sampler table. Replace seconds with the export timeout value, in the range from 1 through 604800 seconds.

Default is 1800 seconds.

Step 9 

template [data | options] timeout seconds
Example:
RP/0/RP0/CPU0:router(config-fem-ver)# template 
data timeout 10000

(Optional) Configures the export period for data packets. Replace seconds with the export timeout value, in the range from 1 through 604800 seconds.

Step 10 

end

or

commit

Example:

RP/0/RP0/CPU0:router (config-fem-ver)# end

or

RP/0/RP0/CPU0:router(config-fem-ver)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them before 
exiting(yes/no/cancel)? 
[cancel]:

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Step 11 

exit
Example:
RP/0/RP0/CPU0:router(config-fem-ver)# exit

Exits flow exporter map version configuration submode.

Step 12 

exit
Example:
RP/0/RP0/CPU0:router(config)# exit

Enters EXEC mode.

Step 13 

show flow exporter-map map_name
Example:
RP/0/RP0/CPU0:router# show flow exporter-map 
fem

Displays exporter map data.

Configuring a Sampler Map

The steps that follow describe how to create and configure a sampler map.

SUMMARY STEPS

1. configure

2. sampler-map map_name

3. random 1 out-of sampling_interval

4. end
or
commit

5. exit

6. exit

7. show sampler-map map_name

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

sampler-map map_name 
Example:
RP/0/RP0/CPU0:router(config)# sampler-map fsm
RP/0/RP0/CPU0:router(config-sm)#f

Creates a sampler map and enters sampler map configuration mode.

Keep the following in mind when configuring a sampler map:

On the Cisco CRS-1 Router, NetFlow supports policing at a rate of 35,000 packets per second per direction for each individual line card.

Step 3 

random 1 out-of sampling_interval
Example:
RP/0/RP0/CPU0:router(config-sm)# random 1 
out-of 65535

Configures the sampling interval to use random mode for sampling packets. Replace the sampling_interval argument with a number, in the range from1 through 65535 units.

Step 4 

end

or

commit

Example:

RP/0/RP0/CPU0:router (config-sm)# end

or

RP/0/RP0/CPU0:router (config-sm)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them before 
exiting(yes/no/cancel)? 
[cancel]:

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Step 5 

exit
Example:
RP/0/RP0/CPU0:router(config-sm)# exit

Exits sampler map configuration mode and enters global configuration mode.

Step 6 

exit
Example:
RP/0/RP0/CPU0:router(config)# exit

Exits global configuration mode and enters EXEC mode.

Step 7 

show sampler-map map_name
Example:
RP/0/RP0/CPU0:router# show sampler-map fsm

Displays sampler map data.

Configuring a Monitor Map

The steps that follow describe how to create and configure a monitor map.

SUMMARY STEPS

1. configure

2. flow monitor-map map_name

3. record ipv4
or
record ipv4 [peer as]
or
record ipv6
or
record mpls
or
record mpls [ipv4-fields] [labels number]
or
record mpls [ipv6-fields] [labels number]
or
record mpls [ipv4-ipv6-fields] [labels number]

4. cache entries number

5. cache permanent

6. cache timeout {active | inactive | upate} timeout_value

7. exporter map_name

8. end
or
commit

9. exit

10. exit

11. show flow monitor-map map_name

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

flow monitor-map map_name
Example:
RP/0/RP0/CPU0:router(config)# flow monitor-map 
fmm
RP/0/RP0/CPU0:router(config-fmm)#

Creates a monitor map and configures a monitor map name and enters flow monitor map configuration submode.

Step 3 

record ipv4
or
record ipv4 [peer as]
or
record ipv6
or
record mpls [labels number] 
or 
record mpls [ipv4-fields] [labels number] 
or 
record mpls [ipv6-fields] [labels number] 
or 
record mpls [ipv4-ipv6-fields] [labels number]
Example:
RP/0/RP0/CPU0:router(config-fmm)# record ipv4

Configures the flow record map name for IPv4, IPv6, or MPLS.

Use the record ipv4 command to configure the flow record map name for IPv4. By default, you collect and export the originating autonomous system (AS) numbers.

Use the record ipv4 [peer as] command to record peer AS. Here, you collect and export the peer AS numbers.

Note Ensure that the bgp attribute-download command is configured. Else, no AS is collected when the record ipv4 [peer-as] command is configured.

Use the record ipv6 command to configure the flow record map name for IPv6.

Use the record mpls labels command with the number argument to specify the number of labels that you want to aggregate. By default, MPLS-aware NetFlow aggregates the top six labels of the MPLS label stack. The maximum value is 6.

Use the record mpls ipv4-fields command to collect IPv4 fields in the MPLS-aware NetFlow.

Use the record mpls ipv6-fields command to collect IPV6 fields in the MPLS-aware NetFlow.

Use the record mpls ipv4-ipv6-fields command to collect IPv4 and IPv6 fields in the MPLS-aware NetFlow.

Step 4 

cache entries number
Example:

RP/0/RP0/CPU0:router(config-fmm)# cache entries 10000

(Optional) Configures the number of entries in the flow cache. Replace the number argument with the number of flow entries allowed in the flow cache, in the range from 4096 through 1000000.

The default number of cache entries is 65535.

Step 5 

cache permanent
Example:

RP/0/RP0/CPU0:router(config-fmm)# flow monitor-map fmm cache permanent

(Optional) Disables removal of entries from flow cache.

Step 6 

cache timeout {active timeout_value | inactive 
timeout_value | upate timeout_value}
Example:

RP/0/RP0/CPU0:router(config-fmm)# cache timeout inactive 1000

(Optional) Configures the active, inactive, or update flow cache timeout value.

The default timeout value for the inactive flow cache is 15 seconds.

The default timeout value for the active flow cache is 1800 seconds.

The default timeout value for the update flow cache is 1800 seconds.

Note The update timeout_value keyword argument is used for permanent caches only. It specifies the timeout value that is used to export entries from permanent caches. In this case, the entries are exported but remain the cache.

Step 7 

exporter map_name
Example:
RP/0/RP0/CPU0:router(config-fmm)# exporter fem

Associates an exporter map with a monitor map.

Note A single flow monitor map can support up to eight exporters.

Step 8 

end

or

commit

Example:

RP/0/RP0/CPU0:router(config-fmm)# end

or

RP/0/RP0/CPU0:router(config-fmm)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them before 
exiting(yes/no/cancel)? 
[cancel]:

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Step 9 

exit
Example:
RP/0/RP0/CPU0:router(config-fmm)# exit

Exits flow monitor map configuration submode.

Step 10 

exit
Example:
RP/0/RP0/CPU0:router(config)# exit

Exits global configuration mode.

Step 11 

show flow monitor-map map_name

Example:
RP/0/RP0/CPU0:router# show flow monitor-map fmm

Displays flow monitor map data.

Applying a Monitor Map and a Sampler Map to an Interface

SUMMARY STEPS

The steps that follow describe how to apply a monitor map and a sampler map to an interface.

1. configure

2. interface type number

3. flow [ipv4 | ipv6 | mpls] monitor monitor_map sampler sampler_map {egress | ingress}

4. end
or
commit

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

interface type number
Example:
RP/0/RP0/CPU0:router(config)# interface 
gigabitEthernet 0/0/0/0
RP/0/RP0/CPU0:router(config-if)#

Enters interface configuration mode.

Step 3 

flow [ipv4 | ipv6 | mpls] monitor monitor_map 
sampler sampler_map {egress | ingress}
Example:
RP/0/RP0/CPU0:router(config-if)# flow ipv4 
monitor fmm sampler fsm egress

Associates a monitor map and a sampler map with an interface.

Enter ipv4 to enable IPV4 NetFlow on the specified interface. Enter ipv6 to enable IPV6 NetFlow on the specified interface. Enter mpls to enable MPLS-aware NetFlow on the specified interface.

Step 4 

end

or

commit

Example:

RP/0/RP0/CPU0:router(config-if)# end

or

RP/0/RP0/CPU0:router(config-if)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them before 
exiting(yes/no/cancel)? 
[cancel]:

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Clearing NetFlow Data

The steps that follow describe how to clear flow exporter map and flow monitor map data.

SUMMARY STEPS

1. clear flow exporter [exporter_name] {restart | statistics} location node-id

2. clear flow monitor [monitor_name] cache [force-export | statistics] location node-id}

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

clear flow exporter [exporter_name] {restart | 
statistics} location node-id

Example:
RP/0/RP0/CPU0:router# clear flow exporter 
statistics location 0/0/CPU0

Clears the flow exporter data.

Specify the statistics option to clear exporter statistics. Specify the restart option to export all of the templates that are currently configured on the specified node.

Step 2 

clear flow monitor [monitor_name] cache 
[force-export | statistics] location node-id}

Example:
RP/0/RP0/CPU0:router# clear flow monitor cache 
force-export location 0/0/CPU0

Clears the flow monitor data.

Specify the statistics option to clear cache statistics. Specify the force-export option to export the data from cache to server first and then clear the entries from cache.

Configuring NetFlow Collection of MPLS Packets with IPv6 Fields

The following steps show how to configure NetFlow collection of MPLS packets with IPv6 fields.

SUMMARY STEPS

1. configure

2. flow exporter-map map_name

3. version v9

4. options {interface-table | sampler-table} [timeout seconds]

5. template [data | options] timeout seconds

6. exit

7. transport udp port

8. source type interface-path-id

9. destination hostname_or_IP_address

10. exit

11. flow monitor-map map_name

12. record mpls [ipv4-ipv6-fields] [labels number]

13. exporter map_name

14. cache entries number

15. cache timeout {active timeout_value | inactive timeout_value | upate timeout_value}

16. cache permanent

17. sampler-map map_name

18. random 1 out-of sampling_interval

19. interface type number

20. flow [ipv4 | ipv6 | mpls] monitor monitor_map sampler sampler_map {egress | ingress}

21. end
or
commit

22. exit

23. exit

24. show flow monitor-map map_name

25. show flow exporter-map map_name

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RP0/CPU0:router# config

Enters global configuration mode.

Step 2 

flow exporter-map map_name

Example:

RP/0/RP0/CPU0:router(config)# flow exporter-map exp1

Creates an exporter map, configures the exporter map name, and enters flow exporter map configuration mode.

Step 3 

version v9
Example:

RP/0/RP0/CPU0:router(config-fem)# version v9

(Optional) Enters flow exporter map version configuration submode.

Step 4 

options {interface-table | sampler-table} [timeout 
seconds]
Example:

RP/0/RP0/CPU0:router(config-fem-ver)# options interface-table timeout 300

(Optional) Configures the export timeout value for the interface table or the sampler table. Replace seconds with the export timeout value, in the range from 1 through 604800 seconds. The default is 1800 seconds for both the interface table and the sample table.

You must perform this step twice to configure the export timeout value for both an interface table and a sample table.

Step 5 

template [data | options] timeout seconds
Example:

RP/0/RP0/CPU0:router(config-fem-ver)# template data timeout 300

(Optional) Configures the export period for data packets or options packets. Replace seconds with the export timeout value, in the range from 1 through 604800 seconds.

You must perform this step twice to configure the export period for both data packets and options packets.

Step 6 

exit
Example:
RP/0/RP0/CPU0:router(config-fem-ver)# exit

Exits flow exporter map version configuration mode, and enters flow exporter map configuration mode.

Step 7 

transport udp port
Example:
RP/0/RP0/CPU0:router(config-fem)# transport udp 
12515

(Optional) Specifies the destination port for UDP packets. Replace port with the destination UDP port value, in the range from 1024 through 65535.

Step 8 

source type interface-path-id
Example:
RP/0/RP0/CPU0:router(config-fem)# source Loopback0

Specifies a source interface, in the format type interface-path-id. For example:

POS 0/1/0/1
or
Loopback0

Step 9 

destination hostname_or_IP_address
Example:
RP/0/RP0/CPU0:router(config-fem)# destination 
170.1.1.11

Configures the export destination for the flow exporter map. The destination can be a hostname or an IP address.

Step 10 

exit
Example:

RP/0/RP0/CPU0:router(config-fem)# exit

Exits flow exporter map configuration mode, and enters flow exporter map configuration mode.

Step 11 

flow monitor-map map_name
Example:

RP/0/RP0/CPU0:router(config)# flow monitor-map MPLS-IPv6-fmm

Creates a monitor map and configures a monitor map name and enters flow monitor map configuration submode.

Step 12 

record mpls [ipv4-ipv6-fields] [labels number]
Example:

RP/0/RP0/CPU0:router(config-fmm)# record mpls ipv6-fields labels 3

Configures the flow record map name for IPv4, IPv6, or MPLS. Use the ipv4-ipv6-fields keyword to collect IPv4 and IPv6 fields in an MPLS-aware NetFlow.

Step 13 

exporter map_name
Example:
RP/0/RP0/CPU0:router(config-fmm)# exporter exp1

Associates an exporter map with a monitor map.

Note A single flow monitor map can support up to eight exporters.

Step 14 

cache entries number
Example:

RP/0/RP0/CPU0:router(config-fmm)# cache entries 10000

(Optional) Configures the number of entries in the flow cache. Replace the number argument with the number of flow entries allowed in the flow cache, in the range from 4096 through 1000000.

The default number of cache entries is 65535.

Step 15 

cache timeout {active timeout_value | inactive 
timeout_value | upate timeout_value}
Example:

RP/0/RP0/CPU0:router(config-fmm)# cache timeout inactive 1800

(Optional) Configures the active, inactive, or update flow cache timeout value.

The default timeout value for the inactive flow cache is 15 seconds.

The default timeout value for the active flow cache is 1800 seconds.

The default timeout value for the update flow cache is 1800 seconds.

Note The inactive and active keywords are not applicable to permanent caches.

Note The update keyword is used for permanent caches only. It specifies the timeout value that is used to export entries from permanent caches. In this case, the entries are exported but remain the cache.

Step 16 

cache permanent
Example:

RP/0/RP0/CPU0:router(config-fmm)# flow monitor-map fmm cache permanent

(Optional) Disables the removal of entries from flow cache.

Step 17 

exit
Example:

RP/0/RP0/CPU0:router(config-fmm)# exit

Exits flow monitor map configuration submode.

Step 18 

sampler-map map_name 
Example:
RP/0/RP0/CPU0:router(config)# sampler-map fsm
RP/0/RP0/CPU0:router(config-sm)#

Creates a sampler map and enters sampler map configuration mode.

Keep the following in mind when configuring a sampler map:

On the Cisco CRS-1 Router, NetFlow supports policing at a rate of 35,000 packets per second per direction for each individual line card.

Step 19 

random 1 out-of sampling_interval
Example:
RP/0/RP0/CPU0:router(config-sm)# random 1 out-of 
65535

Configures the sampling interval to use random mode for sampling packets. Replace the sampling_interval argument with a number, in the range from1 through 65535 units.

Step 20 

exit
Example:

RP/0/RP0/CPU0:router(config-sm)# exit

Exits sampler map configuration mode and enters global configuration mode.

Step 21 

interface type number
Example:
RP/0/RP0/CPU0:router(config)# interface POS 0/0/0/0
RP/0/RP0/CPU0:router(config-if)#

Enters interface configuration mode.

Step 22 

flow [ipv4 | ipv6 | mpls] monitor monitor_map 
sampler sampler_map {egress | ingress}
Example:
RP/0/RP0/CPU0:router(config-if)# flow ipv4 monitor 
MPLS-IPv6-fmm sampler fsm egress

Associates a monitor map and a sampler map with an interface.

Enter ipv4 to enable IPV4 NetFlow on the specified interface. Enter ipv6 to enable IPV6 NetFlow on the specified interface. Enter mpls to enable MPLS-aware NetFlow on the specified interface.

Step 23 

end

or

commit

Example:

RP/0/RP0/CPU0:router (config-fem-ver)# end

or

RP/0/RP0/CPU0:router(config-fem-ver)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them 
before 
exiting(yes/no/cancel)? 
[cancel]:

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Step 24 

exit
Example:

RP/0/RP0/CPU0:router(config-if)# exit

Exits interface configuration submode for the Ethernet interface.

Step 25 

exit
Example:
RP/0/RP0/CPU0:router(config)# exit

Exits global configuration mode.

Step 26 

show flow monitor-map map_name
Example:
RP/0/RP0/CPU0:router# show flow monitor-map fmm

Displays flow monitor map data.

Step 27 

show flow exporter-map map_name
Example:
RP/0/RP0/CPU0:router# show flow exporter-map fem

Displays exporter map data.

Configuring Destination-based NetFlow Accounting

You configure destination-based NetFlow accounting by configuring the flow monitor map, flow record, and flow monitor as described in the following steps.

SUMMARY STEPS

1. configure

2. flow monitor-map map_name

3. record ipv4 destination

4. exit

5. interface type interface-path-id

6. flow ipv4 monitor name ingress

7. end
or
commit

8. show flow exporter-map map_name

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

flow monitor-map map_name
Example:
RP/0/RP0/CPU0:router(config)# flow monitor-map 
map1
RP/0/RP0/CPU0:router(config-fmm)#

Creates a monitor map and configures a monitor map name and enters flow monitor map configuration submode.

Step 3 

record ipv4 destination
Example:
RP/0/RP0/CPU0:router(config-fmm)# record ipv4 
destination.

Configures the flow record for an IPv4 destination-based NetFlow accounting record. The destination keyword specifies that the record is for IPv4 destination-based NetFlow accounting.

Step 4 

exit
Example:
RP/0/RP0/CPU0:router(config-fmm)# exit

Exits flow monitor map mode to global configuration mode.

Step 5 

interface type interface-path-id

Example:

RP/0/RP0/CPU0:router# interface POS 0/1/0/0

Interface type and physical interface-path-id in the format type rack/slot/module/port.

type—POS, Ethernet, ATM, etc.

rack—Chassis number of the rack.

slot—Physical slot number of the line card or modular services card.

module—Module number. A physical layer interface module (PLIM) is always 0.

port—Physical port number of the interface.

Step 6 

flow ipv4 monitor name ingress

Example:

RP/0/RP0/CPU0:router# flow ipv4 monitor monitor1 ingress

Configures an IPv4 flow monitor for the ingress direction and assigns the name of the monitor.

Step 7 

end

or

commit

Example:

RP/0/RP0/CPU0:router(config-fmm)# end

or

RP/0/RP0/CPU0:router(config-fmm)# commit

Saves the current configuration changes.

Step 8 

show flow exporter-map map_name
Example:
RP/0/RP0/CPU0:router# show flow exporter-map 
fem

Verifies exporter map data.

Configuration Examples for NetFlow

The following examples show NetFlow configurations:

Sampler Map: Example

Exporter Map: Example

Flow Monitor Map: Examples

MPLS Flow Monitor with IPv4 and IPv6 Support

Destination-based NetFlow Accounting: Example

Sampler Map: Example

The following example shows how to create a new sampler map called "fsm1," which samples 1 out of 65535 packets:

RP/0/RP0/CPU0:router(config)# sampler-map fsm1 
RP/0/RP0/CPU0:router(config-sm)# random 1 out-of 65535
RP/0/RP0/CPU0:router(config)# exit

Exporter Map: Example

The following example shows how to create a new flow exporter map called "fem1," which uses the version 9 (V9) export format for NetFlow export packets. The data template flow-set is inserted into the V9 export packets once every 10 minutes, and the options interface table flow-set is inserted into the V9 export packet. The export packets are sent to the flow collector destination 10.1.1.1, where the source address is identical to the interface IP address of Loopback 0. The UDP destination port is 1024, and the DSCP value is 10:

RP/0/RP0/CPU0:router(config)# flow exporter-map fem1 
RP/0/RP0/CPU0:router(config-fem)# destination 10.1.1.1
RP/0/RP0/CPU0:router(config-fem)# source Loopback 0
RP/0/RP0/CPU0:router(config-fem)# transport udp 1024
RP/0/RP0/CPU0:router(config-fem)# dscp 10
RP/0/RP0/CPU0:router(config-fem)# exit
RP/0/RP0/CPU0:router(config-fem)# version v9
RP/0/RP0/CPU0:router(config-fem-ver)# template data timeout 600
RP/0/RP0/CPU0:router(config-fem-ver)# options interface-table
RP/0/RP0/CPU0:router(config-fem-ver)# exit

Flow Monitor Map: Examples

The following example shows how to create a new flow monitor map with name "fmm1". This flow monitor map references the flow exporter map "fem1," and sets the flow cache attributes to 10000 cache entries. The active entries from the cache are aged every 30 seconds, while the inactive entries from the cache are aged every 15 seconds. The record map for this monitor map is IPv4:

RP/0/RP0/CPU0:router(config)# flow monitor-map fmm1 
RP/0/RP0/CPU0:router(config-fmm)# record ipv4
RP/0/RP0/CPU0:router(config-fmm)# exporter fem1
RP/0/RP0/CPU0:router(config-fmm)# cache entries 10000
RP/0/RP0/CPU0:router(config-fmm)# cache timeout active 30
RP/0/RP0/CPU0:router(config-fmm)# cache timeout inactive 15
RP/0/RP0/CPU0:router(config-fmm)# exit

The following example shows how to apply the flow monitor "fmm1"and the sampler "fsm1" to the TenGigE 0/0/0/0 interface in the ingress direction:

RP/0/RP0/CPU0:router(config)# interface TenGigE 0/0/0/0
RP/0/RP0/CPU0:router(config-if)# flow ipv4 monitor fmm1 sampler fsm1 ingress 
RP/0/RP0/CPU0:router(config-if)# exit

The following example shows how to configure the NetFlow monitor to collect MPLS packets with IPv6 fields:

RP/0/RP0/CPU0:router# config
RP/0/RP0/CPU0:router(config)# flow exporter-map exp1
RP/0/RP0/CPU0:router(config-fem)# version v9
RP/0/RP0/CPU0:router(config-fem-ver)# options interface-table timeout 300
RP/0/RP0/CPU0:router(config-fem-ver)# options sampler-table timeout 300
RP/0/RP0/CPU0:router(config-fem-ver)# template data timeout 300
RP/0/RP0/CPU0:router(config-fem-ver)# template options timeout 300
RP/0/RP0/CPU0:router(config-fem-ver)# exit 
RP/0/RP0/CPU0:router(config-fem)# transport udp 12515
RP/0/RP0/CPU0:router(config-fem)# source Loopback0
RP/0/RP0/CPU0:router(config-fem)# destination 170.1.1.11
RP/0/RP0/CPU0:router(config-fmm)# exit
RP/0/RP0/CPU0:router(config)# flow monitor-map MPLS-IPv6-fmm
RP/0/RP0/CPU0:router(config-fmm)# record mpls ipv6-fields labels 3
RP/0/RP0/CPU0:router(config-fmm)# exporter exp1
RP/0/RP0/CPU0:router(config-fmm)# cache entries 10000
RP/0/RP0/CPU0:router(config-fmm)# cache permanent
RP/0/RP0/CPU0:router(config-fmm)# exit

RP/0/RP0/CPU0:router(config)# sampler-map FSM
RP/0/RP0/CPU0:router(config-sm)# random 1 out-of 65535
RP/0/RP0/CPU0:router(config-sm)# exit
RP/0/RP0/CPU0:router(config)# interface gigabitEthernet 0/0/0/0
RP/0/RP0/CPU0:router(config-if)# flow mpls monitor MPLS-IPv6-fmm sampler FSM ingress

MPLS Flow Monitor with IPv4 and IPv6 Support: Examples

The following configuration collects MPLS traffic, but no payload information is collected.

RP/0/RP0/CPU0:router(config)# flow monitor-map MPLS-fmm
RP/0/RP0/CPU0:router(config-fmm)# record mpls labels 3
RP/0/RP0/CPU0:router(config-fmm)# cache permanent
RP/0/RP0/CPU0:router(config)# exit
RP/0/RP0/CPU0:router(config)# interface gigabitEthernet 0/0/0/0

RP/0/RP0/CPU0:router(config-if)# flow mpls monitor MPLS-fmm sampler fsm ingress

The following configuration collects MPLS traffic with IPv4 payloads. It also collects MPLS traffic without IPv4 payloads, but it populates the IPv4 fields with zeros (0).

RP/0/RP0/CPU0:router(config)# flow monitor-map MPLS-IPv4-fmm
RP/0/RP0/CPU0:router(config-fmm)# record mpls IPv4-fields labels 3
RP/0/RP0/CPU0:router(config-fmm)# cache permanent
RP/0/RP0/CPU0:router(config-fmm)# exit
RP/0/RP0/CPU0:router:router(config)# interface gigabitEthernet 0/0/0/0
RP/0/RP0/CPU0:router(config-if)# flow mpls monitor MPLS-IPv4-fmm sampler fsm ingress

The following configuration collects MPLS traffic with IPv6 payloads. It also collects MPLS traffic without IPv6 payloads, but it populates the IPv6 fields with zeros (0).

RP/0/RP0/CPU0:router(config)# flow monitor-map MPLS-IPv6-fmm
RP/0/RP0/CPU0:router(config-fmm)# record mpls IPv6-fields labels 3
RP/0/RP0/CPU0:router(config-fmm)# cache permanent
RP/0/RP0/CPU0:router(config-fmm)# exit
RP/0/RP0/CPU0:router(config)# interface gigabitEthernet 0/0/0/0
RP/0/RP0/CPU0:router(config-if)# flow mpls monitor MPLS-IPv6-fmm sampler fsm ingress

The following configuration collects MPLS traffic with both IPv6 and IPv4 fields. It also collects MPLS traffic without IPv4 or IPv6 payloads, but it populates the IPv6 and IPv4 fields with zeros (0).

RP/0/RP0/CPU0:router(config)# flow monitor-map MPLS-IPv4-IPv6-fmm
RP/0/RP0/CPU0:router(config-fmm)# record mpls IPv4-IPv6-fields labels 3
RP/0/RP0/CPU0:router(config-fmm)# cache permanent
RP/0/RP0/CPU0:router(config-fmm)# exit
RP/0/RP0/CPU0:router(config)# interface gigabitEthernet 0/0/0/0
RP/0/RP0/CPU0:router(config-if)# flow mpls monitor MPLS-IPv4-IPv6-fmm sampler fsm ingress

The following example configuration sets IPv6 field collection on a Packet-over-SONET (POS) interface:

RP/0/RP0/CPU0:router(config)# flow monitor-map MPLS-IPv6-fmm
RP/0/RP0/CPU0:router(config-fmm)# record mpls ipv6-fields labels <n>
RP/0/RP0/CPU0:router(config-fmm)# exporter <exporter-name>
RP/0/RP0/CPU0:router(config-fmm)# cache entries <number>
RP/0/RP0/CPU0:router(config-fmm)# cache timeout {active | inactive | update} <timeout>
RP/0/RP0/CPU0:router(config-fmm)# cache permanent
RP/0/RP0/CPU0:router(config-fmm)# exit
RP/0/RP0/CPU0:router(config)# interface pos 0/1/0/0
RP/0/RP0/CPU0:router(config-if)# flow MPLS monitor <MPLS-IPv6-fields> sampler <name> 
<direction>

Note Flow records are exported using the Version 9 format.


Destination-based NetFlow Accounting: Example

The following example shows how to configure an IPv4 flow record for destination-based NetFlow accounting:

RP/0/RP0/CPU0:router# configure
RP/0/RP0/CPU0:router(config)# flow monitor-map map1
RP/0/RP0/CPU0:router(config-fmm)# record ipv4 destination
RP/0/RP0/CPU0:router(config-fmm)# exporter fem
RP/0/RP0/CPU0:router(config-fmm)# exit
RP/0/RP0/CPU0:router(config)# interface pos 0/1/0/0
RP/0/RP0/CPU0:router(config-if)# flow ipv4 monitor map1 ingress
RP/0/RP0/CPU0:router(config-if)# end
RP/0/RP0/CPU0:router# show flow exporter-map fem
RP/0/RP0/CPU0:router# show flow monitor-map map1

Additional References

The following sections provide references related to interface configuration.

Related Documents

Related Topic
Document Title

Cisco IOS XR master command reference

Cisco IOS XR Master Commands List

Cisco IOS XR interface configuration commands

Cisco IOS XR Interface and Hardware Component Command Reference

Initial system bootup and configuration information for a router using the Cisco IOS XR software.

Cisco IOS XR Getting Started Guide

Information about user groups and task IDs

Cisco IOS XR Interface and Hardware Component Command Reference

Information about configuring interfaces and other components on the Cisco CRS-1 Router from a remote Craft Works Interface (CWI) client management application.

Cisco Craft Works Interface User Guide


Standards

Standards
Title

No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.


MIBs

MIBs
MIBs Link

To locate and download MIBs using Cisco IOS XR software, use the Cisco MIB Locator found at the following URL and choose a platform under the Cisco Access Products menu: http://cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml


RFCs

RFCs
Title

3954

NetFlow services export protocol Version 9.


Technical Assistance

Description
Link

The Cisco Technical Support website contains thousands of pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

http://www.cisco.com/techsupport