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User Guide
136
6.2.6. UDP Selection
Some applications do not require reliable transmission at the transport layer either
because they implement their own error control mechanisms or because the
mechanisms used by TCP are too slow for them. These applications can use the light
Next Header number This object contains an 8-bit word that constitutes the next
header identifier to be matched in the incoming traffic. For
example, configuring this object to 17 matches UDP traffic,
TCP uses 6 as the protocol number and ICMPv6 uses num-
ber 58.
The Next Header number configuration field is enabled only if
Next Header is configured to Numeric.
Flow Label match Enables selection by the 20-bit IPv6 flow label field in the cur-
rent filter. The value configured here is used to determine
which packets are allowed to pass through the filter and
which ones are blocked. The available configuration values
for this field are the same that for the Source IPv6 address
match setting.
Flow label The Flow Label IPv6 field contains a 20-bit word that identi-
fies an unidirectional data flow. These labels remain at dis-
posal of intermediate routers for stateful and stateless
processing at flow level. For example, the flow label could be
used to prevent load balancing on a particular traffic flow.
DSCP match Enables selection by the 6-bit differentiated services code
point (DSCP) field in the current filter. The value configured
here is used to determine which packets are allowed to pass
through the filter and which ones are blocked. The available
configuration values for this field are the same that for the
Source IPv6 address match field.
DSCP This object contains a 6-bit word in decimal format that con-
stitutes the DSCP to be matched in the incoming traffic.
Table 6.5: IPv6 Selection
Field Description
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