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Don't Fragment (DF) bit
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Bit in the IP header that instructs routers not to fragment a packet.
You might set this bit if the destination host cannot reassemble the packet
or if you want to test the path maximum transmission unit (MTU) for a destination
host.
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routing instance
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Collection of routing tables, interfaces, and routing protocol interfaces.
The set of interfaces belongs to the routing tables, and the routing protocol
parameters control the information in the routing tables.
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loose source routing
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Option in the IP header used to route a packet based on information
supplied by the source. A gateway or host must route the packet using the
routers specified by this information, but the packet can use other routers
along the way.
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strict source routing
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Option in the IP header used to route a packet based on information
supplied by the source. A gateway or host must route the packet exactly as
specified by this information.
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time to live (TTL)
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Value (octet) in the IP header that is (usually) decremented by 1 for
each hop the packet passes through. If the field reaches zero, the packet
is discarded and a corresponding error message is sent to the source of the
packet.
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type of service (TOS)
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Value (octet) in the IP header that defines the service the source host
requests, such as the packet's priority and the preferred delay, throughput,
and reliability.
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