Monitor all internal network traffic?

Answered Question
Oct 8th, 2008

We have a stack of 3750s for our core switch. I am looking for software to monitor all internal network traffic.

Anyone know of anything?

Correct Answer by netwalkr1 about 8 years 4 months ago

Trippi- I don't believe the 3750's support netflow exports. You could always create an access-list to capture all traffic on the SVI and syslog/grep what your looking for. ;)


ip access-list extended FLOWCAP

permit tcp any range 0 65535 any range 0 65535 log

permit udp any range 0 65535 any range 0 65535 log


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valglinskiy Wed, 10/08/2008 - 14:01

MRTG, Cacti to monitor bandwidth usage

ntop to monitor traffic patterns and per-protocol break-down.

trippi Wed, 10/08/2008 - 14:12

Will ntop give me session information?

Such as source/destination, etc.?


Correct Answer
netwalkr1 Wed, 10/08/2008 - 15:49

Trippi- I don't believe the 3750's support netflow exports. You could always create an access-list to capture all traffic on the SVI and syslog/grep what your looking for. ;)


ip access-list extended FLOWCAP

permit tcp any range 0 65535 any range 0 65535 log

permit udp any range 0 65535 any range 0 65535 log


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