[c-nsp] Sup2T-XL vs Sup720BXL FIB TCAM

[Christian Schmit]

Today I tested a Sup2T-XL and a Sup720BXL in the lab with full bgp feeds for ipv4 and ipv6.
To my understanding the hardware capacity for the FIB TCAM is the same for Sup720-BXL and Sup2T-XL.
Sup2T-XL output of "sh platform hardware capacity":CAT6500-RC2TXL#sh platform hardware capacity | begin L3 Forwarding Resources
L3 Forwarding Resources              FIB TCAM usage:                         Total           Used         %Used                   72 bits (IPv4, MPLS, EoM)     1048576      465980       44%                  144 bits (IP mcast, IPv6)         524288       14903          3%                  288 bits (IPv6 mcast)               262144           1            1% 
                      detail:      Protocol                    Used       %Used                                   IPv4                          465978       44%                                   MPLS                            1          1%                                   EoM                              1          1% 
                                   IPv6                        14894          3%                                   IPv4 mcast                     9          1%                                   IPv6 mcast                     1          1% 
             Adjacency usage:                     Total        Used       %Used                                                        1048576       32018          3% 

Sup720BXL output of "sh platform hardware capacity": (FIB TCAM partitioned with "mls cef maximum-routes ip 768") 
CAT6500-RC720BXL#sh platform hardware capacity | begin L3 Forwarding Resources

L3 Forwarding Resources 
             FIB TCAM usage:                          Total        Used       %Used 
                  72 bits (IPv4, MPLS, EoM)       802816      467348         58% 
                 144 bits (IP mcast, IPv6)           122880       14970         12% 
  
                     detail:      Protocol                    Used       %Used 
                                  IPv4                           467338       58% 
                                  MPLS                             9          1% 
                                  EoM                               1          1% 

                                  IPv6                           14963         12% 
                                  IPv4 mcast                       4          1% 
                                  IPv6 mcast                       3          1% 

            Adjacency usage:                     Total        Used       %Used 
                                                        1048576        1481          1% 

The release notes say: 

-XL mode: 

· IPv4 and MPLS: Up to 1,007,000 routes 
· IPv4 multicast and IPv6 unicast and multicast: Up to 503,000 routes  

"These are the theoretical maximum numbers of routes for the supported protocols (the maximums are not supported simultaneously):"

The above output of the Sup2T-XL seems to say that the Sup2T-XL has a larger FIB TCAM (2M) than the Sup720-BXL.

Christian