Re: How to announce VIP with BGP for DPDK application?

[Linhua Tang <linhua.tang.mr@gmail.com>]

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Hi Victor,

Thanks very much for your response.

Do you mean set next-hop on BGP with Quagga or similar applications through
other NIC (not DPDK managed)?

I looked at DPVS
<https://github.com/iqiyi/dpvs/blob/master/doc/tutorial.md#kni>, which uses
KNI to redirect traffic to Kernel so we can use Quagga or advertise VIP. Do
you think it's a better solution or implement ARP in the DPDK application
directly?

Thanks.

Best wishes,
Linhua Tang


On Mon, Apr 4, 2022 at 2:00 PM Victor Detoni <victordetoni@gmail.com> wrote:

> Hi Linhua,
>
> First of all, you need to bind an IP address on NIC that DPDK manages. You
> can look at https://github.com/victordetoni/dpdk-l3fwd-acl this project
> and copy arp (line 644) and ip stack (line 2024). After that, you can set
> as next-hop on bgp the ip address that dpdk manages.
>
> Maybe it's not clear yet, but dpdk is a framework that allows you to
> create your own network apps. Search on google bgp projects that supports
> bgp, quagga etc.
>
> On Mon, Apr 4, 2022 at 7:29 AM Linhua Tang <linhua.tang.mr@gmail.com>
> wrote:
>
>> Hi everyone,
>>
>> I'm new to DPDK, I have a question on how to announce VIP through BGP for
>> my LB based on DPDK.
>>
>> The design looks like this:
>>
>>    - I have multiple hosts (virtual machines or physical machines),
>>    every host advertising the same VIP, 10.0.0.10 for example.
>>    - Each LB host has two NICs, one for DPDK, one for admin purposes.
>>    - LB forward the packets to backend servers based on VIP configuration
>>
>>
>> Normally, I use Bird or Quagga for BGP advertising, but I don't know how
>> to make BGP work with DPDK applications. Do I need to implement BGP within
>> the DPDK application? It looks overkilling to me.
>>
>> Looking forward to getting advice from you, or pointing me to any
>> references.
>>
>> Thanks very much.
>>
>> Best wishes,
>> James
>>
>

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