Re: [V3] LB / Failure Detection

You can distribute RTP, but its the SIP+RTP that is really painful in combo.

If the goal is for SIP+RTP to land on the same instance, what you want is
initial load balancing across the cluster for the SIP message. Once this
lands on a specific node in the cluster, you want subsequent SIP, and all
of the media, to land on that node. Because the RTP has a totally different
5-tuple than then SIP, the L4 LB will not send it to the same instance.

We also would like decryption to happen at the edge for the outer
transport; obviously this doesnt happen with L4 load balancers, and that is
a feature we want.

We also want more advanced load balancing features that see into the
application layer - URL maps in the http world. We cannot do that with L4
load balancers.

Thx,
Jonathan R.

On Mon, Mar 30, 2020 at 7:20 PM Asveren, Tolga <tasveren@rbbn.com> wrote:

> A basic question about how RIPT would make things better compared to RTP
> in terms of making use of Public Cloud Load-balancers:
>
>
>
> With RTP: One can use L4 LB distributing traffic to a Redundancy Group.
> The pain point is that LB is slow in detecting failures of Redundancy Group
> members.
>
> With RIPT media: One can use HTTP LB distributing traffic a Redundancy
> Group. I would think failure detection characteristics will be similar to
> L4 LB and delayed failure detection issue would continue to be an issue.
>
>
>
> In a nutshell, what would one gain by using a HTTP LB instead of L4 LB?
>
>
>
> Thanks,
>
> Tolga
>
>
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-- 
Jonathan Rosenberg, Ph.D.
jdrosen@jdrosen.net
http://www.jdrosen.net