Hi Eric,

- Do you think that it may be useful to have a sentence about Carrier's Carrier 
IP VPN? I fear that some implementation may allow multiple labels for SAFI 4 
(labelled IP) but not for SAFI 128 (VPN) and would not be capable of 
translating/swapping from N labels on the PE-CE (SAFI 4) side, toward 1 label 
to the PE-PE (SAFI 128) side. In such case, it may be preferable to advertise 
this non-capability on the PE-CE side (e.g. by sending the multiple label 
capability with a max label of 1)

- The current BGP capability encoding does not allow for the sending a 
different number of accepted labels on a per SAFI basis. I don't know whether 
this could be useful (in the future) but I do note that, as indicated in the 
draft, it's already useful to be able to advertise N>1 for some SAFI and N=1 
for some others. So may be the flexibility could be useful. I'll leave the 
cost/benefit choice up to you.

Thanks,
Regards,
Bruno


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