We can drastically improve boot times on some machines, or BM or VM
shapes, if we send DHCP requests in parallel on all interfaces
Add ip=single-dhcp as a kernel boot parameter, to send DHCP requests in
parallel on all interfaces. Thus, DHCP on each interface is overlapped
thereby reducing boot times for multiple interface machines.
This can help reduce the boot time by 1 minute per interface.
In addition, we may also save another 40 secs delay per interface, if
the link on which we try to send DHCP is in DOWN state. This can be
reduced by giving the following kernel command line parameter while
booting - rd.net.timeout.carrier=<timeout>.
Added manpage for ip=single-dhcp with the caveat that it does not
apply to Network Manager or SUSE wicked.
Signed-off-by: Anjali Kulkarni <anjali.k.kulkarni@oracle.com>
In this case we want to cover three cases
1) ip_address:ip_address
2) number:macaddress
3) :macaddress
We consider something an IPv6 address if it starts with number and
contains ":", but IPv6 addresses are in hexa.
This reverts commit c603419030.
wait_for_ipv6_dad_link is only called from dhclient script,
so the original intent "wait for IPv6 RA if using none/static IPv6 assignment"
does not seem to be correct.
Anyway, this brings an issue on isolated networks, where you don't
have any routes outside. dhclient-script hangs on this check
and after it times out, dhclient is able to set the address normally.
Before we check if dad is done we should first make sure,
that there is a link local address where we do the check.
Due to this issue, on ipv6 only setups sometimes dhclient started
asking for ip address, before the link local address was present
and failed immediately.
busybox seems to not properly support this option,
and it can be be safely ommitted or replaced
with piping the output through head.
Rev 2:
* rebased on master
* addressed open points from review
In kdump, if dump-target is ssh on ipv6, we need to sync until ipv6 addr
is ready. Currently ip=auto6/dhcp6 provides such function. But in 1st kernel,
it is hard to know whether the ipv6 addr is got by dhcpv6 or SLAAC.
E.g ifcfg-eth* contains DHCPV6C=yes direction, but there is no dhcpv6
server in the network, and then after the system is up, the user
echo 1 > /proc/sys/net/ipv6/conf/eth0/autoconf && accept_ra by manual
to obtain a ipv6 addr. Or vice.
So this patch suggests to make dhcpv6 as auto6 fallback
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Install ifcfg-* files with team configuration in the initramfs.
Improve the slave configuration of the team interface, by looking up
ifcfg files in the initramfs.
Create a default loadbalance team config, if none present in the
initramfs.
forward port of
4c88c2859e
ip=2620:0052:0000:2220:0226:b9ff:fe81:cde4::[2620:0052:0000:2220:0000:0000:0000:03fe]:64::ibft0:none
should be
ip=[2620:0052:0000:2220:0226:b9ff:fe81:cde4]::[2620:0052:0000:2220:0000:0000:0000:03fe]:64::ibft0:none
https://bugzilla.redhat.com/show_bug.cgi?id=1322592#c19
(cherry picked from commit b8e6c051c6)
IPv6 addresses should be specified in brackets so that the
ip= scanning code doesn't get confused.
References: bnc#887542
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Thomas Renninger <trenn@suse.com>
Users can pass the DNS information throught "nameserver=" cmdline,
there maybe duplicated inputs.
"/etc/resolv.conf" have some restrictions on the number of DNS items
effective, so make sure that this file contains no duplicated items.
We achieve this by simply making the file have no duplicated lines.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
rename iface_has_link() to iface_has_carrier() to clarify usage
Only assign static "wildcard interface" settings, if the interface has a
carrier.
If the interface name was specified with a name, do not do carrier
checking for static configurations.
all_ifaces_up() is true, if all interfaces are up.
all_ifaces_setup() is true, if all interfaces are up and the gateways
and nameserver are setup.
(cherry picked from commit 63e75dc4cd)
rd.net.dhcp.retry=<cnt>
If this option is set, dracut will try to connect via dhcp
<cnt> times before failing. Default is 1.
rd.net.timeout.dhcp=<arg>
If this option is set, dhclient is called with "-timeout <arg>".
rd.net.timeout.iflink=<seconds>
Wait <seconds> until link shows up. Default is 60 seconds.
rd.net.timeout.ifup=<seconds>
Wait <seconds> until link has state "UP". Default is 20 seconds.
rd.net.timeout.route=<seconds>
Wait <seconds> until route shows up. Default is 20 seconds.
rd.net.timeout.ipv6dad=<seconds>
Wait <seconds> until IPv6 DAD is finished. Default is 50 seconds.
rd.net.timeout.ipv6auto=<seconds>
Wait <seconds> until IPv6 automatic addresses are assigned.
Default is 40 seconds.
rd.net.timeout.carrier=<seconds>
Wait <seconds> until carrier is recognized. Default is 5 seconds.
(cherry picked from commit d8ad687e1a)
Some hosting providers need a static route set in order to be
able to reach the default gateway. Be sure to retry adding
the default gateway after setting the static routes.
Harald Hoyer