Does the SRX345 have traffic balancing considerations like the SRX4200 where additional CPU capacity can be utilized by distributing load on interfaces 0-3 and 4-7? The SRX4100/SRX4200 has two CPU complexes: CPU-0 and CPU-1. CPU-0= ports 0,1,2, and 3. CPU-1= ports 4,5,6 and 7.

The hardware architecture of the SRX345 is entirely different from SRX4200. All the traffic on the SRX345 is handled by single CPU, where as the interfaces in the SRX4200 are binded to 2 different CPU sockets. The traffic processing limits varies between SRX345 and SRX4200.

Please refer to the datasheet for the SRX345 and SRX4200 below:

SRX345: SRX345 Enterprise Firewall | Juniper Networks US

SRX4200: srx4100-srx4200-firewall-datasheet.pdf (juniper.net)