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It is easier to backport the entire vyos.ifconfig library from 1.4 instead of
backporting single pieces which are required to add new feature to the tunnel
interface section.
In addition that both libraries are now back in sync it will become much easier
to backport any other new feature introduced in VyOS 1.4!
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When a VIF/VLAN interface is placed in admin down state but the lower
interface, serving the vlan, is moved from admin down -> admin up, all its
vlan interfaces will be placed in admin up state, too.
This is bad as a VLAN interface will become admin up even if its specified as
admin down after a reboot.
To reproduce:
set interfaces ethernet eth1 vif 20 disable
set interfaces ethernet eth1 disable
commit
delete interfaces ethernet eth1 disable
commit
Now check the interface state and it returns UP,LOWER_UP
7: eth1.20@eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:50:56:b3:09:07 brd ff:ff:ff:ff:ff:ff
inet6 fe80::250:56ff:feb3:907/64 scope link
valid_lft forever preferred_lft forever
(cherry picked from commit 49bc3f1e3ff8416908fc986bb60b444a75a1722d)
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Instead of using an Adapter pattern to make interfaces VLAN-aware, create a
derived class named VLANIf to represent a VLAN. This change was necessary to
eliminate mixed code in Interfaces class which was VLAN - free, but recently
gained some VLAN specific code for set_admin_state().
In addition this "autoresolves" the issue in T2894 as a bond vlan interface
will no longer change the lower interface.
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Every derived class must implement update() to set the interfaces admin
up/down state. This is required to prevend extensive link flaps when e.g.
reconfiguring bond interfaces.
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__init__ should be added to a derived class only if it does work in the ctor.
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