Is there a way to merge communities from the same prefixes?

[Maria Matejka]

Hello!

On 6/7/22 7:54 PM, Valery Lutoshkin wrote:
> Hello Chriztoffer,
> 
>> On Mon, 6 Jun 2022 at 13:20, Valery Lutoshkin <vpluto at gmail.com 
>> <mailto:vpluto at 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?

Maria