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Webcast-Catalyst9k
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7606 Netflow Table Utilization

Dear Colleagues,

I am stuck in trying to solve a TCAM/Netflow table utilization problem on 7606. I get sometimes (not the peak hours, it can happen when I have least traffic or pps) the following messages:

MET_DST: %EARL-SP-4-NF_USAGE: Current Netflow Table Utilization is 99%

the otput of "#sh mls netflow table-contention detailed" :

Earl in Module 5

Detailed Netflow CAM (TCAM and ICAM) Utilization

================================================

TCAM Utilization : 100%

ICAM Utilization : 0%

Netflow TCAM count : 262016

Netflow ICAM count : 0

Netflow Creation Failures : 2658971

Netflow CAM aliases : 0

I have the following MLS Netflow config:

mls flow ip destination-source

mls sampling time-based 64

no mls acl tcam share-global

ip flow-aggregation cache prefix

cache entries 524288

cache timeout inactive 60

mask source minimum 32

mask destination minimum 32

enabled

When I see the netflow database on the collector, it shows me pretty normal for this hour number of conversations (for 5 minutes, not exceeding 40000).

When I do "sh mls netflow ip", I get up to 30k entries. IPv6 gives me less than a thousand.

IOS: s72033-advipservicesk9_wan-mz.122-18.SXF4.bin

What could the problem be?

1 REPLY
Bronze

Re: 7606 Netflow Table Utilization

See <http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/msgguide/> msg.htm#wp1013264 :

Error Message EARL-4-NF_USAGE: Current Netflow Table Utilization is [dec]% Explanation This message indicates that NetFlow table utilization exceeds a preset threshold percentage. Recommended Action No action is required.

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