In DSLITE with NAT44 scenario with MS-MPC, customer sessions will be distributed only on four MS-MPCs . other MS-MPC cards will not carry any sessions. MS-MPC line card has four ms-*/*/* interfaces (ms-*/0/0 , ms-*/1/0, ms-*/2/0 and ms-*/3/0). static route (or using any routing protocol) can be used to route the traffic to ms-*/*/* interfaces. problem appears if we steer the traffic to more than 16 ms-*/*/* interfaces.

NAT sessions are working only on four MS-MPCs although it is configured to work on more MS-MPCs. static route is configured for more than 16 next-hops

by default MX routers are able to use only 16 ECMP next-hops. we need to increase the maximum number of ECMP next-hops using the below knob

set chassis maximum-ecmp next-hops <Next-hop-numbers>

<Next-hop-numbers> can be 32,64,96 or 128