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philip
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PostPosted: Mon Jun 23, 2014 7:16 pm    Post subject: slow ping resonse with ifplugd and config in /etc/conf.d/net Reply with quote

I just emerged ifplugd and configured /etc/conf.d/net to monitor my wired interface (enp0s25). I want my wireless interface (wlp3s0) to "take over" when my ethernet cable is pulled and vica versa.

/etc/conf.d/net
Code:
# Let ifplugd monitor the wired interface enp0s25
# Config hints can be found in /usr/share/doc/netifrc-0.1/net.example

# The following seems to work - but slow ping response when enabled!
ifplugd_enp0s25="..."
ifplugd_enp0s25="--api-mode=wlan"

# --- Wired ethernet ---

config_enp0s25="dhcp 192.168.1.250/24"

# config_eth0="dhcp" ?

# --- Wireless WiFi ---

#Prefer wpa_supplicant over wireless-tools
modules_wlp3s0="wpa_supplicant"
 

# It is important that we tell wpa_supplicant which driver we should
# be using as it is not very good at guessing that
wpa_supplicant_wlp3s0="-Dnl80211 -d -f /var/log/wpa_supplicant.log"

config_wlp3s0="dhcp"


The atomatic switch to wlan works when I pull the ethernet cable. But a side effect is that response on ping becomes very slow. Normally ping swiftly "tics" ping responses (at least every second). But with the configuration
Code:
ifplugd_enp0s25="..."
ifplugd_enp0s25="--api-mode=wlan"

I get a ping response approx every 5 seconds.

Can anyone explain this? Is there a cure?
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khayyam
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PostPosted: Mon Jun 23, 2014 8:35 pm    Post subject: Re: slow ping resonse with ifplugd and config in /etc/conf.d Reply with quote

philip wrote:
I just emerged ifplugd and configured /etc/conf.d/net to monitor my wired interface (enp0s25). I want my wireless interface (wlp3s0) to "take over" when my ethernet cable is pulled and vica versa.

philip ... well, you're not telling netifrc/openrc that the interface is plugged ...

/etc/conf.d/net
Code:
modules_wlp2s0="!plug wpa_supplicant dhcpcd"
config_wlp2s0="dhcp"
wpa_supplicant_wlp2s0="-Dnl80211 -qq"

modules_enp0s25="plug dhcpcd"
config_enp0s25="dhcp 192.168.1.250/24"
ifplugd_enp0s25="--no-beep"

That should be all that's needed for netifrc ... you would then add something like the following to /etc/ifplugd/ifplugd.action

Code:
case "$2" in
    up)
    if [ "${INITNG}" = "yes" ] ; then
        ARGS="-u net/$1"
    else
        /etc/init.d/net.wlp2s0 --quiet stop
        ARGS="--quiet start"
    fi
    ;;
    down)
    if [ "${INITNG}" = "yes" ] ; then
        ARGS="-d net/$1"
    else
        ARGS="--quiet stop"
        /etc/init.d/net.wlp2s0 --quiet start
    fi
    ;;
[blah, blah]

Then you would remove net.wlp2s0 from the default runlevel, as it should be automatically started by ifplugd if no network cable it detected ...

Code:
# rc-update del net.wlp2s0 default

I don't use ifplugd but the above should work as expected.

BTW, the ping time is probably due to having two devices on the same subnet ...

best ... khay
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philip
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PostPosted: Wed Jun 25, 2014 5:32 pm    Post subject: Reply with quote

Thanks again khyyam!

I put in the changes you suggest above. It almost works now. But not quite as expected.

When the ethernet cable i plugged and the WiFi is connected (plugged so to speak), then both interfaces are up

Code:
# ifconfig enp0s25 && ifconfig wlp3s0
enp0s25: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 0.0.14.40  netmask 0.0.0.0  broadcast 255.255.255.255
        inet6 fe80::56ee:75ff:fe07:8c8e  prefixlen 64  scopeid 0x20<link>
        ether 54:ee:75:07:8c:8e  txqueuelen 1000  (Ethernet)
        RX packets 1267  bytes 82214 (80.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 8  bytes 680 (680.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 20  memory 0xf0500000-f0520000 

wlp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.210  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::7e7a:91ff:fea3:2f5a  prefixlen 64  scopeid 0x20<link>
        ether 7c:7a:91:a3:2f:5a  txqueuelen 1000  (Ethernet)
        RX packets 2028  bytes 522585 (510.3 KiB)
        RX errors 0  dropped 541  overruns 0  frame 0
        TX packets 1457  bytes 189244 (184.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


and

Code:
# ifplugstatus
enp0s25: link beat detected
wlp3s0: link beat detected


Ping works swiftly and is probably transmited over the Wifi i/f'

When I pull the ethernet cable, then

# ifconfig enp0s25 && ifconfig wlp3s0
Code:
enp0s25: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 0.0.14.40  netmask 0.0.0.0  broadcast 255.255.255.255
        inet6 fe80::56ee:75ff:fe07:8c8e  prefixlen 64  scopeid 0x20<link>
        ether 54:ee:75:07:8c:8e  txqueuelen 1000  (Ethernet)
        RX packets 1460  bytes 94566 (92.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 8  bytes 680 (680.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 20  memory 0xf0500000-f0520000 

wlp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.210  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::7e7a:91ff:fea3:2f5a  prefixlen 64  scopeid 0x20<link>
        ether 7c:7a:91:a3:2f:5a  txqueuelen 1000  (Ethernet)
        RX packets 2147  bytes 536390 (523.8 KiB)
        RX errors 0  dropped 620  overruns 0  frame 0
        TX packets 1470  bytes 190415 (185.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


The wired ethernet i/f enp0s25 is still up, but

# ifplugstatus
Code:
enp0s25: unplugged
wlp3s0: link beat detected
enp0s20u4: unplugged
lo: link beat detected
sit0: unplugged


In other words the enp0s25 i/f is still up but is detected as unplugged.

The ping goes on seamlessly, still over the WiFi i/f.

Shouldn't the wired i/f enp0s25 go down when the wireless i/f wlp3s0 up when the ethernet cable is pulled. And vice versa when the eth cable is put back in again?
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philip
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PostPosted: Wed Jun 25, 2014 6:01 pm    Post subject: Reply with quote

I doscovered an error by me

I had in /etc/conf.d/net
Code:
ifplugd_enp0s25="--no--beep"

which is wrong syntax and should be
Code:
ifplugd_enp0s25="--no-beep"


But stil the wired enp0s25 i/f is not brought down and up as I pull and plug the ethernet cable....

My configuration looks like this now

# cat /etc/conf.d/net
Code:
#  Let ifplugd monitor the wired interface enp0s25
# Config hints can be found in /usr/share/doc/netifrc-0.1/net.example
# Tell netifrc/openrc when the enp0s25 is plugged


# --- Wireless WiFi ---

# Prefer wpa_supplicant over wireless-tools
modules_wlp3s0="!plug wpa_supplicant dhcpcd"

config_wlp3s0="dhcp"
 
# Tell wpa_supplicant which driver to be used, which logfile to use
# and that extra verbose output should be made to the logfile (-qq)

wpa_supplicant_wlp3s0="-Dnl80211 -d -f /var/log/wpa_supplicant.log -qq"


# --- Wired ethernet ---

modules_enp0s25="plug dhcpcd"

config_enp0s25="dhcp 192.168.1.250/24"

ifplugd_enp0s25="--no-beep"


and

# cat /etc/ifplugd/ifplugd.action
Code:
#!/bin/sh
# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
#
# Gentoo-specific ifplugd.action
#
# This file gets called by ifplugd when it wants to bring an interface
# up or down.
#

if grep -q initng /proc/1/cmdline
then
    EXEC="/sbin/ngc"
    INITNG="yes"
else
    EXEC="/etc/init.d/net.$1"
    INITNG="no"
fi

case "$2" in
    up)
        if [ "${INITNG}" = "yes" ]
        then
            ARGS="-u net/$1"
        else
            /etc/init.d/net.wlp3s0 --quiet stop
            ARGS="--quiet start"
        fi
        ;;
    down)
        if [ "${INITNG}" = "yes" ]
        then
            ARGS="-d net/$1"
        else
            ARGS="--quiet stop"
            /etc/init.d/net.wlp3s0 --quiet start
        fi
        ;;
    *)
        echo "$0: wrong arguments" >&2
        echo "Call with <interface> <up|down>" >&2
        exit 1
        ;;
esac

export IN_BACKGROUND=true

if [ -x "${EXEC}" ]
then
    ${EXEC} ${ARGS}
    exit 0
else
    logger -t ifplugd.action "Error: Couldn't configure $1, no ${EXEC} !"
    exit 1
fi

# vim: set ts=4

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khayyam
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PostPosted: Wed Jun 25, 2014 7:16 pm    Post subject: Reply with quote

phil ...

I'm not entirely sure why that's happening, and as I don't have ifplugd installed its difficult for me to check. I suspect that ifplugd is trying to manage both interfaces, please try the following:

/etc/conf.d/net
Code:
ifplugd_enp0s25="--no--beep --iface=enp0s25"

/etc/ifplugd/ifplugd.conf (if it exists ... otherwise don't worry about it) ..
Code:
INTERFACES="enp0s25"

Also, but unrelated ... the '-d' option for wpa_supplicant turns on debug (similarly with '-dd' and '-ddd'), and the '-qq' makes the output 'quiet', so having both, and providing a log, isn't advisable ... just turn on debug/logging as and when needed ... otherwise use the following:

Code:
wpa_supplicant_wlp3s0="-Dnl80211 -qq"

best ... khay
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