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

[Victor Detoni <victordetoni@gmail.com>]

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Hi,

DPVS seems like a very nice project to work with.

On Mon, Apr 4, 2022 at 10:12 AM Linhua Tang <linhua.tang.mr@gmail.com>
wrote:

> 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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