[CentOS-virt] Why are bridges required?
lee at yun.yagibdah.de
Wed Jun 4 01:47:43 UTC 2014
Ilya Ponetayev <instenet at gmail.com> writes:
> You may create as many bridges as you want to have virtual interfaces,
> each bridge consisting only of connection to single VM, and handle
> traffic between bridges and between physical interfaces of host
> through iptables/iproute.
In that case, I`d prefer not to have bridges. Things are easier to deal
with when you only have those network devices you actually need.
Dangling bridges seem to be pretty obsolete.
> IHMO bridging is the most proper and popular technique because it
> provides the most flexible configuration. Your VM sees NIC as Ethernet
> card (so with all L2 features), so either you can terminate this L2
> pipe with bridge in host, and perform L3/higher level handling, or you
> can use for example DHCP server on host binded to your bridge, or
> VLAN-handling config.
Bridges are cool when you actually need them. That doesn`t mean that
they must be there when not needed.
Is there something I don`t understand which makes them always a
requirement? If so, perhaps it would be a nice feature if we were able
to hide bridges we don`t need.
Knowledge is volatile and fluid. Software is power.
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