VeEX MPA, User Manual

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Packet Tab
700
IP TOS (IPv4) /
Traffic Class (IPv6)
Sets the Type Of Service/Traffic Class as defined in RFC 791.
This can be entered as a 2-character HEX value, or the dialog
box lets you configure the TOS based on the individual bit fields.
•
bits 0-2 sets the Precedence
•
bit 3 sets the Delay (0 = Normal, 1 = Low)
•
bit 4 sets the Throughput (0 = Normal, 1 = High)
•
bit 5 sets the Reliability (0 = Normal, 1 = High)
•
bit 6 sets the Cost (0 or 1)
•
bit 7 is reserved for future use (0 or 1)
RFC2474 redefined the TOS fields, where bits 0-5 set the
Differentiated Services Code Point (DSCP).
IP TTLs (IPv4) /
Hop Limits (IPv6)
Sets the IP Time To Live/Hop Limits. This is a decimal value from
0 to 255.
This is an IP header field designed to keep packets from
running in loops, essentially forever, through a network (this can
happen when there is a route change, and the routers involved
don't all know the same information as new information is being
replicated and updated).
The default value is 255, and is reduced by 1 every time it
passes through a server (hop). If this value should ever reach 0,
the packet has expired. The router that it is passing through will
then send it back to the source.
IP Fragment
Flag
(IPv4)
Select to either Allow (0) or Disallow (1) IP fragments.
Flow Label (IPv6) Sets IPv6's IP Flow Label. This is a decimal value from 0 to
1048575.
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