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How can I enable netflow on Cisco 3550 or Cisco 3750 devices?
Cisco does not support NetFlow on the following devices:
Cisco 2900
Cisco 3500
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Unable to change flowmask error message on Cisco 6500
You will not be able to change the flowmask after you configure NAT. You might be hitting the bug CSCsb41562 (fixed on 12.2(18)SXF)
Actually it is...
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I configured NetFlow on Cat6500, but application shows only a few MBytes, whereas it should have been several GBytes.
Cat6500 uses MSFC only for the first packet, and the last packets are switched using PFC (CEF , dCEF ). To...
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When I run show ip flow top-talkers I see null destination interface. What does null interface mean?
Output interfaces are "Null" in the following cases:
The packets are blocked by an ACL.
The packets are process switcheded. This...
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What means flow mask in the mls configuration?
By default, the flow keys are: Source IP address, destination IP address, source port, destination port, layer 3 protocol type, ToS byte (DSCP) and...
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How can I configure netflow on Cisco?
Please check Appendix 1 on WANGuard User Manual to see a brief guide to setting up the NetFlow data export (NDE ) on a
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All IN traffic passing through interface, but no OUT traffic
Run the command:
show ip interface brief | exclude unassigned
to list all L3 interfaces that have assigned IP address.
Check if you...
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What are the optimal netflow aging values?
We suggest configure long aging time on 120 sec and normal aging time to 60 sec. Aging time is critical for network anomalies...
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What is difference between ip flow ingress and ip route-cache flow?
The "ip route-cache flow" can be used only under the main interface, while the "ip flow ingress" was an enhancement to be used...
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What is diference between normal, fast and long mls aging?
The MLS aging time (default 300 seconds) applies to all NetFlow table entries. You can configure the normal aging time in the...
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