From 380818b3182b1d7dad5440f8e821852a84162ff0 Mon Sep 17 00:00:00 2001 From: Ferruh Yigit Date: Wed, 17 Jan 2018 18:30:39 +0000 Subject: [PATCH] doc: update pcap guide Add note about PMD expects the network interfaces provided to be up, documented behavior to set expectations right. Also added minor fix. Signed-off-by: Ferruh Yigit Acked-by: John McNamara --- doc/guides/nics/pcap_ring.rst | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/doc/guides/nics/pcap_ring.rst b/doc/guides/nics/pcap_ring.rst index de47f68cf6..7fd063c945 100644 --- a/doc/guides/nics/pcap_ring.rst +++ b/doc/guides/nics/pcap_ring.rst @@ -5,7 +5,7 @@ Libpcap and Ring Based Poll Mode Drivers ======================================== In addition to Poll Mode Drivers (PMDs) for physical and virtual hardware, -the DPDK also includes two pure-software PMDs. These two drivers are: +the DPDK also includes pure-software PMDs, two of these drivers are: * A libpcap -based PMD (librte_pmd_pcap) that reads and writes packets using libpcap, - both from files on disk, as well as from physical NIC devices using standard Linux kernel drivers. @@ -148,6 +148,12 @@ Otherwise, the first 512 packets from the input pcap file will be discarded by t --vdev 'net_pcap0,rx_pcap=file_rx.pcap,tx_pcap=file_tx.pcap' \ -- --port-topology=chained --no-flush-rx +.. note:: + + The network interface provided to the PMD should be up. The PMD will return + an error if interface is down, and the PMD itself won't change the status + of the external network interface. + Rings-based PMD ~~~~~~~~~~~~~~~ -- 2.20.1