bgpd: fix add label support to EVPN AD routes (backport #17985) #18007
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When peering with an EVPN device from other vendor, FRR acting as route reflector is not able to read nor transmit the label value. Actually, EVPN AD routes completely ignore the label value in the code, whereas in some functionalities like evpn-vpws, it is authorised to carry and propagate label value. Fix this by handling the label value. Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com> (cherry picked from commit 1cefe94)
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When peering with an EVPN device from other vendor, FRR acting as route reflector is not able to read nor transmit the label value.
Actually, EVPN AD routes completely ignore the label value in the code, whereas in some functionalities like evpn-vpws, it is authorised to carry and propagate label value.
Fix this by handling the label value.
This is an automatic backport of pull request #17985 done by Mergify.