North American Network Operators Group|
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Re: using sniffer on high-bandwidth pipes
If you want to get serious, check out endace cards... www.endace.com
Their cards offload much of the pcap processing to the specialized nic... It is only for sniffing. They manage to do a zero copy directly to memory... You can capture near line rate at gigabit speeds.
They are expensive, but worth it for serious monitoring.. Tie this with a fast dell tower that you can put on a cart or a something like a Dell 2950 with lots of disk space and run argus http://www.qosient.com/argus/index.htm
todd romero wrote:
does anyone have expirience using a sniffer on a hi-capacity network segment, that might know if there are limitations I need to worry about? example: customers doing EMC database replication across a mpls link, and when the capacity reaches aprox. 250 Mbp/s packets are arriving out of sequence etc. So we need to put sniffers on both sides to capture some data to see whats happeneing when the capacity reaches 250mbps. what kind of system requirements would be needed to be able to be able to capture that amount of data. For some reason, I dont think that the Dolch Pac 65 sniffers we have (running nt4 and sniffer pro2) would be able to handle that kind of data? If they cant, we can probbaly use a sun box. what kind of specs would the box need? tia, tr