If you have flexible network flow troubleshooting, the following guide may help you.
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I’m moving on to configuring NetFlow and some useful commands for troubleshooting NetFlow issues.
Nexus Netflow 1000v 5.x Configuration
The Nexus 1000v has a number of pre-installed 5″ data stream records:
To view the various fields that can be captured, enter the following command:
show flow record netflow-original predefined-record-name
Create A Proper Stream Entry In The Nexus 1000v (SKIP IF A PREDEFINED RECORDER IS USED):
Stream entry name
Matches the destination IPv4 address. Quick Notes: Netflow does not support mixing Datalink fields with other field types in an exact record.
- tos (enter service)
- Source address
- destination address
- Destination port
- Source port
- Mac home address
- Mac Local Address
- Ether type
Collect TCP transport flags Quick notes:
- Bytes: Collected in 32-bit counters only if actually specified64-bit counter.
- Package: Assembled in 32-bit counters, a long 64-bit counter can certainly be specified
Note. Cisco recommends using 64-bit counters in systems with data rates greater than 1 Gbps.
Show transaction record name
Create Clock Exporter:
Flow Exporter name
source lc-exp ipv4-addr/mask
transport udp port-num
option exporter-stats timeout secs
Template data timeout in seconds
Show data feed exporter name
Create An Appropriate Flow Monitor:
Flow monitor name
Keep original data
Show thread computer monitor names
Add Flow Monitor To Port Profile:
port-profile [type ethernet] name
Enter the name of the IP flow monitor
View Port Profile [Expand-Interface] [Name Name]
Troubleshooting Netflow On Nexus 1000v:
- show flow interface – Display information next to NetFlow interfaces.
Flexible Configuration Of Netflow IOS XE For 3.6E:
I’ll talk about the ios-xe 3.6.4 setting that has been released since the last stable version of ISE 2.0+ and allows NetFlow to collect group security tags.
The following are the requirements for Flexible NetFlow in IOS XE 3.6:
Risoluzione Dei Problemi Del Flusso Di Rete Flessibile
Probleemoplossing Flexibele Netflow
Felsokning Av Flexibelt Natflode
Rozwiazywanie Problemow Z Elastycznym Netflow
유연한 Netflow 문제 해결
Solucao De Problemas De Fluxo De Rede Flexivel
Fehlerbehebung Bei Flexiblem Netflow
Depannage De Netflow Flexible
Solucion De Problemas De Flujo De Red Flexible
Ustranenie Nepoladok Gibkogo Setevogo Potoka