> According to my "research" so far, the ASR1k does use TCAM but *not* > for the actual FIB. It's used for ACLs and QoS stuff, though.
You are 100% correct. TCAM for features, QFP memory for FIB. It would mean we utilize just 40% of the QFP DRAM for that kind of FIB and > the box is apparently more limited by the RP/ESP RAM than by QFP RAM > (the QFP part is specced identical or better then ESP40 at 1GB QFP RAM, > 40MB TCAM and 512MB packet buffer), which explains why the real ESP40 > with dedicated 8GB of FECP RAM can be specced for 4M routes in the FIB, > while the 1002-X reaches the roof a little earlier. But is the 3.3M > prefixes FIB really condensed to those 316MB of PLU Mgr stuff (and what > does PLU stand for)? > Yeah, it condenses way down. I'm not sure exactly what the magic is, but I'm sure it has to do with only storing a prefix and next hop adjacency instead of additional information about the route itself. The PLU is "Pointer Lookup Unit". Also know as the forwarding lookup process. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
