Sending packet using libpcap speed limitation

Question

I wrote a program that captures Ethernet packets from some NIC (i.e eth0) at high speed (about 1Gbps) and forward traffic using pcap_sendpacket() to another NIC (i.e eth1).

While the forwarder Ethernet interface is not connected to another computer NIC, forwarding speed is desired, but when I connect it, sending speed gets down awfully (from 900 Mbps to 100 Mbps).

Can anybody explain the reason?

_{OS: Kubuntu linux 10.10

Language: C++

Library: Libpcap}

score 1 · Accepted Answer · answered Dec 01 '10 at 14:36

1

Because the destination NIC is a 100 Bbps interface :D :p

answered Dec 01 '10 at 14:36

salman

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score 0 · Answer 2 · answered Dec 20 '14 at 00:15

0

Or the auto-negotiation for the network device has been turned off and is trying 100Mbps firstly.

answered Dec 20 '14 at 00:15

John Greene

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Sending packet using libpcap speed limitation

2 Answers2