Mon, Feb 26, 2018 at 02:35:24PM CET, andrew@lunn.ch wrote:
On Mon, Feb 26, 2018 at 10:59:34AM +0200, Ido Schimmel wrote:
One of the nice things about network namespaces is that they allow one to easily create and test complex environments.
Unfortunately, these namespaces can not be used with actual switching ASICs, as their ports can not be migrated to other network namespaces (NETIF_F_NETNS_LOCAL) and most of them probably do not support the L1-separation provided by namespaces.
However, a similar kind of flexibility can be achieved by using VRFs and by looping the switch ports together. For example:
br0 + vrf-h1 | vrf-h2 + +---+----+ + | | | | 192.0.2.1/24 + + + + 192.0.2.2/24 swp1 swp2 swp3 swp4 + + + + | | | | +--------+ +--------+Hi Ido
So you decided to stick to a bridge of just two interfaces. You clearly can write tests using this, but it seems very limiting. You cannot test bridging vs flooding. You cannot tests packets don't leak between parallel bridges. It i hard to test igmp snooping, etc.
It seems to me, using 8 ports, not 4, would give you a much more flexible and interesting test setup.
You can add tests that would use how many ports you like. It is up to the individual test how many ports it needs. Top of this patchset is 4.
Andrew
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