Description

Customers might experience difficulties configuring JFLOW on ACX7024.

Example:
Model: ACX7024
Junos: 24.2R1.18-EVO


 

Symptoms

When customers try to configure the J-flow monitoring on the ACX router, they could get the below error.
[edit]
user@acx7024# commit check
[edit interfaces et-0/0/0 unit 0 family inet]
'sampling'
Requires forwarding-options sampling or packet-capture config
error: configuration check-out failed: (statements constraint check failed)


 

Solution

J-Flow is not supported in ACX7024. Our internal ACX PFE team indicated that the CPU and memory resources in ACX7024 are limited to handling software-based J-Flow.


Please note that J-Flow is supported in the ACX7024X or ACX7100 platform.


Here's an example configuration of how to run JFLOW on ACX7024XL or ACX7100 (ACX7K family models that support the feature).

Example:

set chassis fpc 0 sampling-instance 1
set services flow-monitoring version-ipfix template temp1 ipv4-template
set interfaces et-0/0/X unit 0 family inet filter input jflowfilter
set interfaces et-0/0/X unit 0 family inet filter output jflowfilter
set interfaces et-0/0/X unit 0 family inet address 30.0.0.1/24 arp 30.0.0.50 mac 00:00:00:00:00:0b
set interfaces et-0/0/Y unit 0 family inet address 30.0.0.10/24 arp 30.0.0.2 mac 00:00:00:00:00:0a
set forwarding-options sampling instance 1 input rate 500
set forwarding-options sampling instance 1 family inet output flow-server 30.0.0.50 port 5012
set forwarding-options sampling instance 1 family inet output flow-server 30.0.0.50 dscp 10
set forwarding-options sampling instance 1 family inet output flow-server 30.0.0.50 version-ipfix template temp1
set forwarding-options sampling instance 1 family inet output inline-jflow source-address 30.0.0.9
set firewall family inet filter jflowfilter interface-specific
set firewall family inet filter jflowfilter term f1 then sample
set firewall family inet filter jflowfilter term f1 then accept

Modification History

2024-09-25 : Article Created

2025-03-12: Internal Notes Published