This KB address the reason for the following log messages seen on Backup RE: "eventd: sendto: Network is down"

The below logs are observed in message files on Backup RE every 15 minutes:

"eventd: sendto: Network is down"

• The concerned logs are observed after every 15minutes on Backup RE.
• These log messages are getting generated due to invoking a new syslog for log rotation every 15 minutes. During the log rotation, the backup RE tries to send syslog to the remote host/external syslog server, and at the same time the eventd process logs an error message.
• These are harmless logs and could be ignored.
• We can use the below KB to filter out the logs :

Junos Platform Example: How to prevent certain syslog messages from being written to the log file

The issue is addressed in PR: PR1348544. 

Moreover, if the customer wants to send all the logs getting generated on Backup RE to an external syslog server, we can use the following command to copy the logs from Backup RE to Master RE. And then from Master RE, the logs could be sent to external syslog server. However, please note that we cannot send the logs directly from RE1.

COMMAND: set system syslog host other-routing-engine any any

Version 1

https://prsearch.juniper.net/problemreport/PR1348544