Version, Header lengthVersion, Header length
Shows Version and Header length in the IPv4 header.
Total lengthTotal length
Shows Total length in the IPv4 header.
DSCP/TOSDSCP/TOS
When changing the DSCP/TOSDSCP/TOS (Differentiated Service Code Point/Type of
Service) setting, it is possible to define some handling characteristics of the
datagram, originally defined in RFC 791. Other uses of the DSCP/TOSDSCP/TOS setting
are VoIP, DiffServ and ECN.
IdentifierIdentifier
The
Identifier
is mainly used for uniquely identifying fragments of an IP
datagram. When the Auto incrementAuto increment check box is selected, the Identifier will be
different for each sent frame.
Flags, Fragment OffsetFlags, Fragment Offset
If the MFMF (More Fragments) flag is set: When a packet is fragmented, all
fragments have the MF flag set except the last fragment.
If the DFDF (Don't Fragment) flag is set: When fragmentation is required to route
the packet, then the packet will be dropped.
RESRES (Reserved) must be zero (i.e. not set).
TTLTTL
TTL
(Time To Live) defines the number of 'hops' a datagram can do before it
no longer is forwarded.
ProtocolProtocol
The ProtocolProtocol field defines the upper/next layer protocol encapsulated in the IP
datagram. Typical values in hex are:
1 = ICMP
,
6 = TCP
etc.
Src IP/Dst IPSrc IP/Dst IP
Source IP address
and
Destination IP address
can be entered using the format:
255.255.255.255
.
When Multistream traffic is sent from one port to another, make sure that the source
address on one port is the same as the destination address on the other port for each of
the active streams. This applies both if the two ports are in one instrument and if they are
in two different instruments.
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