tcpdump mailing list archives

Re: Taps compatibility


From: "Chris Reining" <creining () packetfu org>
Date: Fri, 6 Oct 2006 13:44:25 -0500

I want to monitor a Gigabit Multimode(SX) Fiber link. If use a Network
Tap then:
        - Using one SX NIC: Can Libpcap capture packets from TX and RX NIC's
connector?
        - Have I to use 2 different NICs to connect the fibers to the RX
connectors and don't use the TX ones? ¿Configuring the NIC's
autonegotation would work?

The TAP output, non-aggregated, will be two TX strands. You need two
RX connectors so you need either a dual port fiber card or two
separate single port fiber cards so you will have two RX connectors at
your disposal. Bonding these interfaces together in linux will provide
an aggregated traffic strea,.

Chris
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