[ovs-dev] [PATCH] ovn-northd: Support connecting multiple routers to a switch.

Guru Shetty guru at ovn.org
Thu May 12 17:15:12 UTC 2016


>
>
>>
>> I think one of the main discussion points was needing thousands of arp
>> flows and thousands of subnets, and it was on an incorrect logical
>> topology, I am glad that it is not an issue any more.
>>
>
> I think you misunderstood - having one or more gateway per tenant does not
> make Transit LS better in flow scale.
> The size of a Transit LS subnet and management across Transit LSs is one
> the 5 issues I mentioned and it remains the same
> as do the other issues.
>
> Based on the example with 1000 HVs, 1000 tenants, 1000 HV/tenant, one
> distributed logical router per tenant
> spanning 1000 HVs, one gateway per tenant, we have a Transit LS with 1001
> router type logical ports (1000 HVs + one gateway).
>

A transit LS does not have 1001 router type ports. It has just two. One of
them only resides in the gateway. The other one resides in every
hypervisor. This is the same as a router peer port. Transit LS adds one
extra per hypervisor, which I have agreed as a disadvantage. If that is
what you mean, then it is right.

>
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