EVPN IRB - RFC 9135 support

[Erik Stomp]

Dear BIRD community,

I plan to use the BIRD EVPN beta implementation 
(https://gitlab.nic.cz/labs/bird/-/tree/evpn?ref_type=heads) for a 
private Lab.
I use EVPN in my employer's data center (based on FRR), so I am already 
quite familiar with EVPN.

If I don't miss anything, the current EVPN implementation does't support 
EVPN IRB as described in RFC 9135.
Since I only want to use BIRD EVPN in a lab, this is not a big problem 
for me. Of course I could use FRR, which supports IRB, but since I use 
BIRD everywhere, it would be nice if I could also use it in the EVPN 
lab.

So my question is: Are there any plans to implement RFC 9135 in the 
foreseable future? I know, this isn't a 5 minute task and fully 
understand if it's not planned due to low priority.
Maybe I can use the new L3VPN feature as an alternative then. Has anyone 
tried it yet? Otherwise, I'll have a look at it, as soon as I find some 
time.

Best regards,
Erik