>
>> On Mon, 6 Jun 2022 at 13:20, Valery Lutoshkin <vpluto@gmail.com
>> <mailto:vpluto@gmail.com>> wrote:
>> > For example:
>> > peer 1: 1.1.1.1/32 <http://1.1.1.1/32> 1:100
>> > peer 2: 1.1.1.1/32 <http://1.1.1.1/32> 2:200
>> > peer 3: 1.1.1.1/32 <http://1.1.1.1/32> 3:300
>> >
>> > If the last one was chosen, the result is 1.1.1.1/32 <http://1.1.1.1/32> 3:300
>> >
>> > If there is any way to collect all communities and attach them to the chosen prefix (like this: 1.1.1.1/32 <http://1.1.1.1/32> 1:100,2:200,3:300), would anyone please
>> tell me how to do that?
>>
>> What is your use case for this "somewhat odd" request?
>>
>
> In some cases my users want to use the prefixes from one or two sources
> only. So they use route-maps to filter by community.
> In my example, if the user wanted to get the prefixes from the peer 1
> and filtered to accept 1:100 only, he loses the prefix 1.1.1.1/32
> <http://1.1.1.1/32>.

What about the BGP AddPath feature which allows for sending more than
one route for the same prefix?