Junos OS supports to send selected syslog to the other Routing Engine, the sample configuration as below. For PTX platform, both RE's em0 ports should be up and are able to communicate each other to support this feature.

host other-routing-engine {

any error;

log-prefix other-RE;

}

NOTE: Junos EVO OS does not support this feature by writing this article.

NOTE: PR/1528298 had fixed the 'missing' log-prefix issue.

The customer does not have the active link to connect PTX em0 ports to the management switch, so the master RE won't be able to send selected syslog to the other-routing-engine via em0 ports.

Please note, the MX em0 ports are internal ports, always up, it won't be affected by management links.

Connect the PTX em0 ports to the management switch and make sure they are able to communicate each other.