Why might a network interface (NIC) be in "promiscuous mode" and what does it mean?
Issue
-
Need to know the meaning of the following messages:
Feb 24 12:15:14 server kernel: device eth0 entered promiscuous mode Feb 24 12:15:39 server kernel: device eth0 left promiscuous mode -
My NIC card has the PROMISC flag set in
ipandifconfigoutput:# ip link show eth0 2: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 52:54:00:4b:72:87 brd ff:ff:ff:ff:ff:ff -
Hundreds of messages
device ethX left promiscuous mode - How to avoid the
promiscuous modemessages being logged repeatedly?
Environment
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 4
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