Quanta Cloud Technology QuantaMesh QNOS5, Configuration Manual

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1.4.13. System Time Management
You can configure the switch to obtain the system time and date through a remote Simple Network Time
Protocol (SNTP) server, or you can set the time and date locally on the switch. You can also configure the time
zone and information about time shifts that might occur during summer months.
Note: The manually-configured local clock settings are not retained across a system reset if the
platform does not include a Real Time Clock (RTC).
1.4.14. Source IP Address Configuration
Syslog, TACACS, SNTP, sFlow, SNMP Trap, RADIUS, and DNS Clients allow the IP Stack to select the source IP
address while generating the packet. This feature provides an option for the user to select an interface for the
source IP address while the management protocol transmits packets to management stations. The source
address is specified for each protocol.
1.4.15. Multiple Linux Routing Tables
On Linux systems, local and default IPv4 routes for the service port and network port are installed in routing
tables dedicated to each management interface. Locally-originated IPv4 packets use these routing tables
when the source IP address of the packet matches an address on one of these interfaces. This feature
allows the Linux IP stack to use default routes for different interfaces simultaneously.
1.4.16. Core Dump
The core dump feature provides the ability to retrieve the state from a crashed box such that it can be then
loaded into a debugger and have that state re-created there.
1.4.16.1. Core Dump File Handling
A core dump file can be transferred to a debugger using several methods, depending on the supported
switch interfaces and capabilities:

Via a USB connection (if supported)

Stored locally on flash (if it is of sufficient size) and accessed from a remote system via NFS.

Transferred via FTP to a remote FTP server.
Because the size of the core dump file can be several hundred megabytes, the file is compressed using the
bzip2 compression technique available in BusyBox. Compression is enabled by default and can be enabled/
disabled using the CLI.
1.4.17. Open Network Install Environment Support
Open Network Install Environment (ONIE) allows customers to install their choice of network operating
system (NOS) onto an QNOS platform. When the switch boots, ONIE enables the switch to fetch a NOS
stored on a remote server. The remote server can hold multiple NOS images, and the administrator can