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specify which NOS to load and run on the switch. ONIE support in QNOS facilitates automated data center
provisioning by enabling a bare-metal network switch ecosystem.
ONIE is a small operating system. It is preinstalled as firmware and requires an ONIE-compliant boot loader
(U-Boot/BusyBox), a kernel (Linux) and the ONIE discovery and execution application provided by the ODM.
For more information about ONIE, see http://onie.github.io/onie.
1.4.18. Interface Error Disable and Auto Recovery
If QNOS software detects an error condition for an interface, it places the interface in diagnostic disabled
state by shutting down the interface. The error-disabled interface does not allow any traffic until it is re-
enabled. The interface can be manually re-enabled by the administrator or, when the Auto Recovery feature
is enabled, can be re-enabled automatically after a configurable time-out.
There are multiple reasons that may cause QNOS to place an interface in the
error-disabled
state. Auto
Recovery can be configured to take effect if an interface is error-disabled for any reason, or for some
reasons but not others.
1.5. Routing Features
1.5.1. IP Unnumbered
Each routing interface can be configured to borrow the IP address from the loopback interfaces and use
this IP for all routing activities.
The IP Unnumbered feature was initially developed to avoid wasting an entire subnet on point-to-point
serial links.
The IP Unnumbered feature can also be used in situations where adjacencies are transient and adjacent
interfaces cannot be easily configured with IPv4 addresses in the same subnet. It also helps in reducing the
configuration overhead in large scale Data-Center deployments.
1.5.2. Open Shortest Path First (OSPF)
Open Shortest Path First (OSPF) is a dynamic routing protocol commonly used within medium-to-large
enterprise networks. OSPF is an interior gateway protocol (IGP) that operates within a single autonomous
system.
1.5.3. Border Gateway Partol (BGP)
BGP is an exterior routing protocol used in large-scale networks to transport routing information between
autonomous systems (AS). As an interdomain routing protocol, BGP is used when AS path information is
required to provide partial or full Internet routing downstream. QNOS supports BGP version 4.
The following BGP features are supported:
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