In-band Management Overview

RBFS is mostly deployed on an ONL host as a Linux container. The ONL host is only reachable through the out-of-band management interface. In order to use services like NTP, and TACACS, which are run on ONL, or to use services like ssh, snmpd running in LXC container, one must use an out-of-band management connection. In-band management provides a way to access these services which are running in ONL and LXC containers via physical traffic ports.

The RBFS creates a Linux kernel interface named inband-mgmt-0 when in-band management is enabled on an instance. The loopback IPs of the in-band instance are then assigned to this Linux interface, and the routes of this instance are downloaded to the LXC container, then to ONL. Trap rules are installed in the hardware depending on the in-band service enabled.