Gentoo networking weirdness

[Qchem]

Ok, I don't understand this, on bootup my dhcp lease is released, and I don't get a new one - meaning my networking doesn't work until I log in and rerun dhcpcd. Whilst this is a minor annoyance for me, for my firends and family occassionally using this machine it's unacceptable. Any one any ideas of whats going wrong / how to fix it?

[SoulSe]

Show us your /etc/conf.d/net file...

[Qchem]

# /etc/conf.d/net:

# $Header: /home/cvsroot/gentoo-src/rc-scripts/etc/conf.d/net,v 1.7 2002/11/18 19:39:22 azarah Exp $

 

# Global config file for net.* rc-scripts

 

# This is basically the ifconfig argument without the ifconfig $iface

#

#iface_eth0="192.168.0.2 broadcast 192.168.0.255 netmask 255.255.255.0"

#iface_eth1="207.170.82.202 broadcast 207.0.255.255 netmask 255.255.0.0"

 

# For DHCP set iface_eth? to "dhcp"

# For passing options to dhcpcd use dhcpcd_eth?

#

iface_eth0="dhcp"

#dhcpcd_eth0="..."

#dhcpcd_eth0="-t 20"

 

# For adding aliases to a interface

#

#alias_eth0="192.168.0.3 192.168.0.4"

 

# NB: The next is only used for aliases.

#

# To add a custom netmask/broadcast address to created aliases,

# uncomment and change accordingly. Leave commented to assign

# defaults for that interface.

#

#broadcast_eth0="192.168.0.255 192.168.0.255"

#netmask_eth0="255.255.255.0 255.255.255.0"

 

 

# For setting the default gateway

#

#gateway="eth0/192.168.0.1"

 

 

 

On every boot, I get a message saying the DHCP lease has been released. Sometimes I get another lease later in the boot, sometimes I don't - weird!!

 

This is on kernel 2.6.7, using e100 network module and udev.

[SoulSe]

I'm not at my box right now, but I've had to sort out a similar problem before. There are various settings with the dhcpcd_eth0="..." that control timeout, etc. and might solve your problem.

 

I can't remember if there is a man page for this, so you might have to search on the Gentoo forums for the flags...

[iphitus]

This happens on my laptop too, and it has been happening since i updated to 2.6.7, as with Qchem.

 

I fixed it in my case by changing my networking script to run dhcpcd twice -- dirty, hackish, but it seems to work.

[SoulSe]

hmm.... I'm also on 2.6.7, but not getting any problems with the dhcp server built into my router.... maybe it's a hardware specific problem?

 

Anyway, hacking away at the net file should work...

[iphitus]

He has an intel, I have a realtek 8139too

[ac_dispatcher]

This may not be it but Gentoo is changing the script. When was the last time you did a

 

# etc-update

 

 

Check out my /etc/conf.d/net file .. Notice the "new style" with old. May be your problem.

 

 

 

# /etc/conf.d/net: Global config file for net.* rc-scripts

# $Header: /var/cvsroot/gentoo-src/rc-scripts/etc/conf.d/net,v 1.10 2004/06/28 19:44:46 agriffis Exp $

 

##############################################################################

#

# READ THIS COMMENT FIRST

#

# PLEASE PICK ONE of the configuration methods listed below. If you

# don't know which to pick, use the top one, NEW-STYLE IFCONFIG.

# The other two possible options are OLD-STYLE IFACE and

# IPROUTE2-STYLE.

#

# If you have multiple sections (for example IFCONFIG and IPROUTE2)

# the network scripts will attempt to make reasonable assumptions

# about what to use, but there is no guarantee on the results, so

# PLEASE just use one set of configuration variables.

#

# At the bottom there is an ADVANCED CONFIGURATION section with some

# additional configuration possibilities

#

##############################################################################

 

 

##############################################################################

# NEW-STYLE IFCONFIG examples

# ---------------------------

# This uses /sbin/ifconfig and /sbin/route to set the network up.

# It is suitable for most home users.

##############################################################################

 

# To use DHCP on eth0, simply uncomment the following line:

ifconfig_eth0=( "dhcp" )

 

# For passing custom options to dhcpcd use something like the following. This

# example reduces the timeout for retrieving an address from 60 seconds (the

# default) to 10 seconds. Note that this might be too short for some servers,

# so the default is encouraged unless you know what you're doing.

dhcpcd_eth0="-t 15"

 

# For a static configuration, use something like this. This sets the primary

# eth0 address to 192.168.0.2 and adds two aliases, eth0:1 and eth0:2

#ifconfig_eth0=(

# "192.168.0.2 broadcast 192.168.0.255 netmask 255.255.255.0"

# "192.168.0.3 broadcast 192.168.0.255 netmask 255.255.255.0"

# "192.168.0.4 broadcast 192.168.0.255 netmask 255.255.255.0"

#)

 

# This is just like setting the gateway config option in the old-style iface

# config, but allows one to add custom routes. This should not be needed if you

# are obtaining an address via DHCP since the default route should be set

# automatically.

#routes_eth0=(

# "default gw 192.168.0.1"

#)

 

# VLAN support - emerge net-misc/vconfig

# Please ensure your VLAN IDs are NOT zero-padded

#vlans_eth0="1 2"

#ifconfig_eth0_1=( "dhcp" )

#ifconfig_eth0_2=( "172.16.2.1 broadcast 172.16.3.255 netmask 255.255.254.0" )

 

 

##############################################################################

# OLD-STYLE IFACE examples (deprecated)

# -------------------------------------

# This uses /sbin/ifconfig and /sbin/route to set the network up,

# but is not as flexible as the IFCONFIG method above or the

# IPROUTE2 method below.

##############################################################################

 

# To use DHCP on eth0, simply uncomment the following line:

#iface_eth0="dhcp"

 

# For passing custom options to dhcpcd use something like the following. This

# example reduces the timeout for retrieving an address from 60 seconds (the

# default) to 10 seconds. Note that this might be too short for some servers,

# so the default is encouraged unless you know what you're doing.

#dhcpcd_eth0="-t 10"

 

# To set a static IP address use a line similar to this

#iface_eth0="192.168.0.2 broadcast 192.168.0.255 netmask 255.255.255.0"

 

# For setting the default gateway. You should not need to do this if you use

# DHCP since the default gateway should be set automatically.

#gateway="eth0/192.168.0.1"

 

# For adding aliases to a interface, specify them space-separated in the

# following string

#alias_eth0="192.168.0.3 192.168.0.4"

 

# To add a custom netmask/broadcast address to created aliases, specify them in

# the same order as the alias_eth0 string. If you find yourself doing this, you

# might consider switching to the new-style

#broadcast_eth0="192.168.0.255 192.168.0.255"

#netmask_eth0="255.255.255.0 255.255.255.0"

 

# VLAN support - emerge net-misc/vconfig

# Please ensure your VLAN IDs are NOT zero-padded

#vlans_eth0="1 2"

#iface_eth0_1="dhcp"

#iface_eth0_2="172.16.2.1 broadcast 172.16.3.255 netmask 255.255.254.0"

 

 

##############################################################################

# IPROUTE2-STYLE CONFIGURATION

# ----------------------------

# This makes use of the /sbin/ip command to set routes and ip

# addresses. This style is very useful if you are building an

# advanced linux router or using VRRP For more information on how to

# use the iproute2 command have a look at the ip(8) man page.

#

# NOTE: You must emerge sys-apps/iproute2 to use this configuration

##############################################################################

 

# To use DHCP on eth0, simply uncomment the following line:

#ipaddr_eth0=( "dhcp" )

 

# For passing custom options to dhcpcd use something like the following. This

# example reduces the timeout for retrieving an address from 60 seconds (the

# default) to 10 seconds. Note that this might be too short for some servers,

# so the default is encouraged unless you know what you're doing.

#dhcpcd_eth0="-t 10"

 

# For a static configuration, use something like this. This sets the primary

# eth0 address to 192.168.0.2 and adds two aliases, eth0:1 and eth0:2.

# You may also pass advanced ip addr commands via this option.

#ipaddr_eth0=(

# "192.168.0.2/24 brd 192.168.0.255"

# "192.168.0.3/24 brd 192.168.0.255"

# "192.168.0.4/24 brd 192.168.0.255"

#)

 

# The following will set up the default gateway. You can also pass advanced

# route configs via this option.

#iproute_eth0=(

# "default via 192.168.0.1"

#)

 

# VLAN support - emerge net-misc/vconfig

# Please ensure your VLAN IDs are NOT zero-padded

#vlans_eth0="1 2"

#ipaddr_eth0_1=( "dhcp" )

#ipaddr_eth0_2=( "172.16.2.1/23 brd 172.16.3.255" )

 

 

##############################################################################

# ADVANCED CONFIGURATION

# ----------------------

# The items in this section can be combined with one of the sections

# above to create a complete network configuration. None of the

# items in this section are necessary to configure for most users.

##############################################################################

 

# Four functions can be defined which will be called surrounding the

# start/stop operations. The functions are called with the interface

# name first so that one function can control multiple adapters.

#

# The return values for the preup and predown functions should be 0

# (success) to indicate that configuration or deconfiguration of the

# interface can continue. If preup returns a non-zero value, then

# interface configuration will be aborted. If predown returns a

# non-zero value, then the interface will not be allowed to continue

# deconfiguration.

#

# The return values for the postup and postdown functions are ignored

# since there's nothing to do if they indicate failure.

#

#preup() {

# # Test for link on the interface prior to bringing it up. This

# # only works on some network adapters and requires the ethtool

# # package to be installed.

# if ethtool $1 | grep -q 'Link detected: no'; then

# ewarn "No link on $1, aborting configuration"

# return 1

# fi

#

# # Remember to return 0 on success

# return 0

#}

#

#predown() {

# # Test to make sure the root filesystem is not mounted via NFS.

# # Interface ($1) is ignored but could also be tested if you know

# # what interface is providing NFS root.

# if grep -q ' / nfs' /proc/mounts; then

# ewarn "Root is NFS mounted, aborting deconfiguration of $1"

# return 1

# fi

#

# # Remember to return 0 on success

# return 0

#}

#

#postup() {

# # This function could be used, for example, to register with a

# # dynamic DNS service. Another possibility would be to

# # send/receive mail once the interface is brought up.

#}

#

#postdown() {

# # This function is mostly here for completeness... I haven't

# # thought of anything nifty to do with it yet ;-)

#}

 

# For changing MAC addresses - emerge net-analyzer/macchanger

# - to set a specific MAC address

#mac_eth0="00:11:22:33:44:55"

# - to randomize the last 3 bytes only

#mac_eth0="random-ending"

# - to randomize between the same physical type of connection (eg fibre, copper, wireless) , all vendors

#mac_eth0="random-samekind"

# - to randomize between any physical type of connection (eg fibre, copper, wireless) , all vendors

#mac_eth0="random-anykind"

# - full randomization - WARNING: some MAC addresses generated by this may NOT act as expected

#mac_eth0="random-full"

# custom - passes all parameters directly to net-analyzer/macchanger

#mac_eth0="some custom set of parameters"

 

# uncomment this function for support for changing MAC addresses

# also uncomment it's invocation in preup() above

preup_macchanger() {

eval mac_IFACE=\"\$\{mac_${IFACE}\}\"

if [ -n "${mac_IFACE}" ]; then

if [[ -x /sbin/macchanger ]]; then

local macchanger_opts=""

case "${mac_IFACE}" in

# specific mac-addr, i wish there were a shorter way to specify this

[0-9a-zA-Z][0-9a-zA-Z]:[0-9a-zA-Z][0-9a-zA-Z]:[0-9a-zA-Z][0-9a-zA-Z]:[0-9a-zA-Z][0-9a-zA-Z]:[0-9a-zA-Z][0-9a-zA-Z]:[0-9a-zA-Z][0-9a-zA-Z]) macchanger_opts="${macchanger_opts} --mac=${mac_IFACE}" ;;

# increment MAC address, default macchanger behavior

increment) macchanger_opts="${macchanger_opts}" ;;

# randomize just the ending bytes

random-ending) macchanger_opts="${macchanger_opts} -e" ;;

# keep the same kind of physical layer (eg fibre, copper)

random-samekind) macchanger_opts="${macchanger_opts} -a" ;;

# randomize to any known vendor of any physical layer type

random-anykind) macchanger_opts="${macchanger_opts} -A" ;;

# fully random bytes

random-full) macchanger_opts="${macchanger_opts} -r" ;;

# default case is just to pass on all the options

*) macchanger_opts="${macchanger_opts} ${mac_IFACE}" ;;

esac

#echo "/sbin/macchanger ${macchanger_opts} ${IFACE}"

/sbin/macchanger ${macchanger_opts} ${IFACE} >/dev/null

retval=$?

if [ $retval -gt 0 ]; then

eerror "Failed to set MAC address"

return 1

fi

else

eerror "For changing MAC addresses, emerge net-analyzer/macchanger"

return 1

fi

fi

return 0 #important

}

 

# For link bonding/trunking - emerge net-misc/ifenslave

# if you are using any of the slave interfaces, it is important that you remove

# configurations for them and take them down first!

slaves_bond0="eth2"

ipaddr_bond0=( "172.16.2.1/23 brd 172.16.3.255" )

 

postup_bonding() {

# return silently if this is not a bonding interface

if [ -n "${IFACE/bond*/}" ]; then

return 0

fi

eval slaves_IFACE=\"\$\{slaves_${IFACE}\}\"

if [[ -n "${slaves_IFACE}" ]]; then

if [[ -x /sbin/ifenslave ]]; then

# must force the slaves to a particular state before adding them

for slaveiface in ${slaves_IFACE}; do

ifconfig ${slaveiface} 0.0.0.0 up

done

# now force the master to up

ifconfig ${IFACE} up

# finally add in slaves

/sbin/ifenslave ${IFACE} ${slaves_IFACE}

else

eerror "For link aggregation (bonding), emerge net-misc/ifenslave"

return 1

fi

fi

return 0 #important

}

 

predown_bonding() {

# return silently if this is not a bonding interface

if [ -n "${IFACE/bond*/}" ]; then

return 0

fi

# don't trust the config, get the active list instead

slaves_IFACE=$(awk '/^Slave Interface:/ { printf $3" " }' /proc/net/bonding/${IFACE})

if [[ -n "${slaves_IFACE}" ]]; then

# remove all slaves

echo /sbin/ifenslave -d ${IFACE} ${slaves_IFACE}

/sbin/ifenslave -d ${IFACE} ${slaves_IFACE}

# reset all slaves

for slaveiface in ${slaves_IFACE}; do

ifconfig ${slaveiface} 0.0.0.0 down

done

fi

return 0

}

 

preup_linkdetect() {

# Test for link on the interface prior to bringing it up. This

# only works on some network adapters and requires the ethtool

# package to be installed.

if ethtool $1 | grep -q 'Link detected: no'; then

ewarn "No link on $1, aborting configuration"

return 1

fi

}

[iphitus]

Ok, turns out my method isnt working.

 

It has released the IP by the time i log in to X

[Qchem]

Do you know what package contians the new version of the script? I have no config files to update. Perhaps I'll just try an emerge system later today.

[Qchem]

Actually, theres nothing network related to be updated in system.

[ac_dispatcher]

Forgot to ask

 

Do you run stable or unstable (~x86)?

 

I run ~x86. The new script showed up on a emerge -u world

[Qchem]

Via a process of elimination it seems that the problem is caused by hotplug (which I installed at the same time as udev). Short of removing hotplug I don't think theres much I can do except try to debug dhcpcd and home something good comes out of it.

[jlc]

rc-update add net.eth0 default

 

Did you do that? Sounds trivial, but might have missed it.

[Qchem]

rc-update add net.eth0 default

 

Yeah, I have done that - thanks for the suggestion though.