Flexible Netflow - Ingress VRF Support
The Flexible Netflow - Ingress VRF Support feature enables collecting the virtual routing and forwarding (VRF) ID from incoming packets on a router by applying an input flow monitor having a flow record that collects the VRF ID as a key or a nonkey field.
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Information About Flexible NetFlow Ingress VRF Support
Flexible NetFlow—Ingress VRF Support Overview
This feature enables collecting the virtual routing and forwarding (VRF) ID from incoming packets on a router by applying an input flow monitor having a flow record that collects the VRF ID as a key or a nonkey field.
How to Configure Flexible NetFlow Ingress VRF Support
Configuring a Customized Flow Record
Perform this task to configure a customized flow record.
Customized flow records are used to analyze traffic data for a specific purpose. A customized flow record must have at least one match criterion for use as the key field and typically has at least one collect criterion for use as a nonkey field.
There are hundreds of possible permutations of customized flow records. This task shows the steps that are used to create one of the possible permutations. Modify the steps in this task as appropriate to create a customized flow record for your requirements.
SUMMARY STEPS
1. enable
2. configure terminal
3. flow record record-name
4. description description
5. match {ipv4 | ipv6} {destination | source} address
6. Repeat Step 5 as required to configure additional key fields for the record.
7. collect interface {input | output}
8. Repeat Step 7 as required to configure additional nonkey fields for the record.
9. end
10. show flow record record-name
11. show running-config flow record record-name
DETAILED STEPS
|
Command or Action |
Purpose |
Step 1 |
enable
Example:
|
Enables privileged EXEC mode.
- Enter your password if prompted.
|
Step 2 |
configure terminal
Example:
Device# configure terminal
|
Enters global configuration mode. |
Step 3 |
flow record record-name
Example:
Device(config)# flow record FLOW-RECORD-1
|
Creates a flow record and enters Flexible NetFlow flow record configuration mode.
- This command also allows you to modify an existing flow record.
|
Step 4 |
description description
Example:
Device(config-flow-record)# description Used for basic traffic analysis
|
(Optional) Creates a description for the flow record. |
Step 5 |
match {ipv4 | ipv6} {destination | source} address
Example:
Device(config-flow-record)# match ipv4 destination address
|
Configures a key field for the flow record.
Note |
This example configures the IPv4 destination address as a key field for the record. For information about the other key fields available for the match ipv4 command, and the other match commands that are available to configure key fields, refer to the Cisco IOS Flexible NetFlow Command Reference . |
|
Step 6 |
Repeat Step 5 as required to configure additional key fields for the record. |
— |
Step 7 |
collect interface {input | output}
Example:
Device(config-flow-record)# collect interface input
|
Configures the input interface as a nonkey field for the record.
Note |
This example configures the input interface as a nonkey field for the record. For information on the other collect commands that are available to configure nonkey fields, refer to the Cisco IOS Flexible NetFlow Command Reference. |
|
Step 8 |
Repeat Step 7 as required to configure additional nonkey fields for the record. |
— |
Step 9 |
end
Example:
Device(config-flow-record)# end
|
Exits Flexible NetFlow flow record configuration mode and returns to privileged EXEC mode. |
Step 10 |
show flow record record-name
Example:
Device# show flow record FLOW_RECORD-1
|
(Optional) Displays the current status of the specified flow record. |
Step 11 |
show running-config flow record record-name
Example:
Device# show running-config flow record FLOW_RECORD-1
|
(Optional) Displays the configuration of the specified flow record. |
Creating a Customized Flow Monitor
Perform this required task to create a customized flow monitor.
Each flow monitor has a separate cache assigned to it. Each flow monitor requires a record to define the contents and layout of its cache entries.
Before You Begin
If you want to use a customized record instead of using one of the Flexible NetFlow predefined records, you must create the customized record before you can perform this task.
If you want to add a flow exporter to the flow monitor for data export, you must create the exporter before you can complete this task.
 Note |
You must use the no ip flow monitor command to remove a flow monitor from all of the interfaces to which you have applied it before you can modify the parameters for the record command on the flow monitor. For information about the ip flow monitor command, refer to the Cisco IOS Flexible NetFlow Command Reference.
|
SUMMARY STEPS
1. enable
2. configure terminal
3. flow monitor monitor-name
4. description description
5. record {record-name | netflow-original | netflow {ipv4 | ipv6} record [peer]}
6. cache {entries number | timeout {active | inactive | update} seconds | type {immediate | normal | permanent}}
7. Repeat Step 6 as required to finish modifying the cache parameters for this flow monitor.
8. statistics packet protocol
9. statistics packet size
10. exporter exporter-name
11. end
12. show flow monitor [[name] monitor-name [cache [format {csv | record | table}]] [statistics]]
13. show running-config flow monitor monitor-name
DETAILED STEPS
|
Command or Action |
Purpose |
Step 1 |
enable
Example:
|
Enables privileged EXEC mode.
- Enter your password if prompted.
|
Step 2 |
configure terminal
Example:
Device# configure terminal
|
Enters global configuration mode. |
Step 3 |
flow monitor monitor-name
Example:
Device(config)# flow monitor FLOW-MONITOR-1
|
Creates a flow monitor and enters Flexible NetFlow flow monitor configuration mode.
- This command also allows you to modify an existing flow monitor.
|
Step 4 |
description description
Example:
Device(config-flow-monitor)# description Used for basic ipv4 traffic analysis
|
(Optional) Creates a description for the flow monitor. |
Step 5 |
record {record-name | netflow-original | netflow {ipv4 | ipv6} record [peer]}
Example:
Device(config-flow-monitor)# record FLOW-RECORD-1
|
Specifies the record for the flow monitor. |
Step 6 |
cache {entries number | timeout {active | inactive | update} seconds | type {immediate | normal | permanent}}
Example:
Device(config-flow-monitor)# cache type normal
|
(Optional) Modifies the flow monitor cache parameters such as timeout values, number of cache entries, and the cache type.
- The values for the keywords associated with the timeout keyword have no effect when the cache type is set to immediate.
|
Step 7 |
Repeat Step 6 as required to finish modifying the cache parameters for this flow monitor. |
— |
Step 8 |
statistics packet protocol
Example:
Device(config-flow-monitor)# statistics packet protocol
|
(Optional) Enables the collection of protocol distribution statistics for Flexible NetFlow monitors. |
Step 9 |
statistics packet size
Example:
Device(config-flow-monitor)# statistics packet size
|
(Optional) Enables the collection of size distribution statistics for Flexible NetFlow monitors. |
Step 10 |
exporter exporter-name
Example:
Device(config-flow-monitor)# exporter EXPORTER-1
|
(Optional) Specifies the name of an exporter that was created previously. |
Step 11 |
end
Example:
Device(config-flow-monitor)# end
|
Exits Flexible NetFlow flow monitor configuration mode and returns to privileged EXEC mode. |
Step 12 |
show flow monitor [[name] monitor-name [cache [format {csv | record | table}]] [statistics]]
Example:
Device# show flow monitor FLOW-MONITOR-2 cache
|
(Optional) Displays the status and statistics for a Flexible NetFlow flow monitor. |
Step 13 |
show running-config flow monitor monitor-name
Example:
Device# show running-config flow monitor FLOW_MONITOR-1
|
(Optional) Displays the configuration of the specified flow monitor. |
Applying a Flow Monitor to an Interface
Before it can be activated, a flow monitor must be applied to at least one interface. Perform this required task to activate a flow monitor.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface type number
4. {ip | ipv6} flow monitor monitor-name {input | output}
5. Repeat Steps 3 and 4 to activate a flow monitor on any other interfaces in the device over which you want to monitor traffic.
6. end
7. show flow interface type number
8. show flow monitor name monitor-name cache format record
DETAILED STEPS
|
Command or Action |
Purpose |
Step 1 |
enable
Example:
|
Enables privileged EXEC mode.
- Enter your password if prompted.
|
Step 2 |
configure terminal
Example:
Device# configure terminal
|
Enters global configuration mode. |
Step 3 |
interface type number
Example:
Device(config)# interface GigabitEthernet 0/0/0
|
Specifies an interface and enters interface configuration mode. |
Step 4 |
{ip | ipv6} flow monitor monitor-name {input | output}
Example:
Device(config-if)# ip flow monitor FLOW-MONITOR-1 input
|
Activates a flow monitor that was created previously by assigning it to the interface to analyze traffic. |
Step 5 |
Repeat Steps 3 and 4 to activate a flow monitor on any other interfaces in the device over which you want to monitor traffic. |
— |
Step 6 |
end
Example:
|
Exits interface configuration mode and returns to privileged EXEC mode. |
Step 7 |
show flow interface type number
Example:
Device# show flow interface GigabitEthernet 0/0/0
|
Displays the status of Flexible NetFlow (enabled or disabled) on the specified interface. |
Step 8 |
show flow monitor name monitor-name cache format record
Example:
Device# show flow monitor name FLOW_MONITOR-1 cache format record
|
Displays the status, statistics, and flow data in the cache for the specified flow monitor. |
Configuration Examples for Flexible NetFlow Ingress VRF Support
Example: Configuring Flexible NetFlow for Ingress VRF Support
The following example configures the collection of the virtual routing and forwarding (VRF) ID from incoming packets on a router by applying an input flow monitor having a flow record that collects the VRF ID as a key field.
This example starts in global configuration mode.
!
flow record rm_1
match routing vrf input
match ipv4 source address
match ipv4 destination address
collect interface input
collect interface output
collect counter packets
!
flow monitor mm_1
record rm_1
!
interface GigabitEthernet 0/0/0
ip vrf forwarding green
ip address 172.16.2.2 255.255.255.252
ip flow monitor mm_1 input
!
end
Additional References
Related Documents
Related Topic |
Document Title |
Cisco IOS commands |
Cisco IOS Master Command List, All Releases |
Flexible NetFlow conceptual information and configuration tasks |
Flexible NetFlow Configuration Guide |
Flexible NetFlow commands |
Cisco IOS Flexible NetFlow Command Reference |
Standards/RFCs
Standard |
Title |
No new or modified standards/RFCs are supported by this feature. |
— |
MIBs
MIB |
MIBs Link |
None |
To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL: http://www.cisco.com/go/mibs |
Technical Assistance
Description |
Link |
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
http://www.cisco.com/cisco/web/support/index.html |
Feature Information for Flexible NetFlow—Ingress VRF Support
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Table 1 Feature Information for Flexible NetFlow—Ingress VRF Support
Feature Name |
Releases |
Feature Information |
Flexible NetFlow--Ingress VRF Support |
12.2(33)SRE 12.2(50)SY 15.0(1)M 15.0(1)SY 15.0(1)SY1 |
Enables collecting the virtual routing and forwarding (VRF) ID from incoming packets on a router by applying an input flow monitor having a flow record that collects the VRF ID as a key or a nonkey field. Support for this feature was added for Cisco 7200 and 7300 Network Processing Engine (NPE) series routers in Cisco IOS Release 12.2(33)SRE. The following commands were introduced or modified: collect routing, match routing, option (Flexible NetFlow), show flow monitor. |