Modifying /etc/network/interfaces to include the following post-up
completed networking startup successfully;
auto int0.51
iface int0.51 inet manual
vlan-raw-device int0
pre-up ifconfig $IFACE up
post-up brctl addbr br_nat_ext
post-down ifconfig $IFACE down
auto br_nat_ext
iface br_nat_ext inet manual
bridge_ports int0.51
bridge_maxwait 5
pre-up ifconfig $IFACE up
post-down ifconfig $IFACE down
auto int0.500
iface int0.500 inet manual
vlan-raw-device int0
pre-up ifconfig $IFACE up
post-up brctl addbr br_int_500
post-down ifconfig $IFACE down
auto br_int_500
iface br_int_500 inet manual
bridge_ports int0.500
bridge_maxwait 5
pre-up ifconfig $IFACE up
post-down ifconfig $IFACE down
Interestingly enough the dhclient also survived (see previous update) when
networking completed successfully;
root@fancy:/data# ps auxf | grep -i dhclient
root 1264 0.0 0.0 99896 5700 ? Ssl 21:59 0:00
/sbin/dhclient -1 -4 -v -i -pf /run/dhclient.br_ext_prim.pid -lf
/var/lib/dhcp/dhclient.br_ext_prim.leases -I -df
/var/lib/dhcp/dhclient6.br_ext_prim.leases br_ext_prim
Both prior boots to this one had no running dhclient after the bridges failed
to come up.
This should imho be unrelated.
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https://bugs.launchpad.net/bugs/1874515
Title:
20.04 does not bring up certain bridges
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