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Please explain in detail this configuration of interfaces file

asked 2015-11-20 12:41:24 -0500

aksan gravatar image

# OpenStack External interface

auto eth2

iface eth2 inet manual

up ifconfig $IFACE 0.0.0.0 up

up ip link set $IFACE promisc on

down ip link set $IFACE promisc off

down ifconfig $IFACE down

post-up ethtool -K $IFACE gro off

auto br-ex

iface br-ex inet static

address 192.168.100.2

netmask 255.255.255.0

post-up ethtool -K $IFACE gro off

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answered 2015-11-21 02:09:19 -0500

dbaxps gravatar image

See https://ask.openstack.org/en/question...
Regarding disabling GRO view https://lwn.net/Articles/358910/, to understand features which are disabled.
Due to eth2 is OVS port at br-ex it was placed in promiscuous mode to avoid dropping at br-ex packets with target IPs different from br-ex's IP.

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Asked: 2015-11-20 12:41:24 -0500

Seen: 112 times

Last updated: Nov 21 '15