[c-nsp] 6PE FIB usage on 6500/7600

[Steve Glendinning]

Hi all,

I've enabled 6PE on some of our rsp720-3cxl's (running SRE8) that carry
full global routes, and it appears to have allocated a separate MPLS label
for each IPv6 prefix in BGP (approx 16,000 of them).  Consequently this is
chewing up significantly more FIB space, as each (global) IPv6 prefix now
uses 1 144-bit slot and 1 72-bit slot (so 3 of the 1M entries available).

Is this right?  It seems very wasteful, given that in the IPv4 world I only
have labels for my IGP routes and everything else is happy being sent
towards their favourite default route with just a "loopback" label on it.

Some of the Cisco documentation mentions an "aggregate" IPv6 label, which
would make more sense.  Is this available on 7600/6500?

Thanks,
-- 
Steve