Friday, January 17, 2020

Netflow on IOS

Hi I am having trouble with Netflow. We used to use simple netflow but since we went to this advanced config type, it has not worked. What am I missing? Router model: ISR4221 image: 16.9.4

Thanks!

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flow record NETFLOW

match ipv4 tos

match ipv4 protocol

match ipv4 source address

match ipv4 destination address

match transport source-port

match transport destination-port

collect interface output

collect counter bytes long

collect counter packets long

!

flow exporter y.y.y.y

destination x.x.x.x

source GigabitEthernet0/0/1.300

transport udp 12007

!

flow monitor NETFLOW

exporter x.x.x.x

record NETFLOW

​

interface GigabitEthernet0/0/1.300

bandwidth 10000

encapsulation dot1Q 300 native

ip flow monitor NETFLOW input

ip flow monitor NETFLOW output

ip address x.x.x.x 255.255.255.0

no ip redirects

no ip proxy-arp

ip ospf priority 0

arp timeout 300

service-policy output QOS-PARENT-OUT

​

ROUTER#sho ip cache flow

IP packet size distribution (0 total packets):

1-32 64 96 128 160 192 224 256 288 320 352 384 416 448 480

.000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000

​

512 544 576 1024 1536 2048 2560 3072 3584 4096 4608

.000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000

​

IP Flow Switching Cache, 0 bytes

0 active, 0 inactive, 0 added

0 ager polls, 0 flow alloc failures

Active flows timeout in 30 minutes

Inactive flows timeout in 15 seconds

last clearing of statistics never

Protocol Total Flows Packets Bytes Packets Active(Sec) Idle(Sec)

-------- Flows /Sec /Flow /Pkt /Sec /Flow /Flow

​

SrcIf SrcIPaddress DstIf DstIPaddress Pr SrcP DstP Pkts



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