sdm prefer

Use this command to change the template that will be active after the next reboot. The keywords are as follows:

• dual-ipv4-and-ipv6 – Filters subsequent template choices to those that support both IPv4 and IPv6. The default template maximizes the number of IPv4 and IPv6 unicast routes, while limiting the number of ECMP next hops in each route to 4. The data-center template support increases the number of ECMP next hops to 32. The alpm and alpm-mpls-data-center templates accommodate larger routes. The values for the alpm and alpm-mpls-data-center templates are shown below:

  dual-ipv4-and-ipv6 alpm:
  ARP Entries.................................... 2560
  IPv4 Unicast Routes............................ 32768
  IPv6 NDP Entries............................... 2560
  IPv6 Unicast Routes............................ 24576
  ECMP Next Hops................................. 48
  IPv4 Multicast Routes.......................... 0
  IPv6 Multicast Routes.......................... 0
  
  dual-ipv4-and-ipv6 alpm-mpls-data-center:
  ARP Entries.................................... 2560
  IPv4 Unicast Routes............................ 32768
  IPv6 NDP Entries............................... 2560
  IPv6 Unicast Routes............................ 24576
  ECMP Next Hops................................. 16
  IPv4 Multicast Routes.......................... 0
  IPv6 Multicast Routes.......................... 0

• ipv4-routing – Filters subsequent template choices to those that support IPv4, and not IPv6. The IPv4-routing default template maximizes the number of IPv4 unicast routes, while limiting the number of ECMP next hops in each route to 4. The data-center default template supports increases the number of ECMP next hops to 32 and reduces the number of routes. The data-center plus template increases the number of ECMP next hops to 32 while keeping the maximum IPv4 routes.