VeEX MPA User Manual page 539

MPA_e_manual_D07-00-129P_RevA00
Protocol Tabs
Payload
IP TOS (IPv4) /
Traffic Class (IPv6)
IP TTLs (IPv4) /
Hop Limits (IPv6)
IP Fragment
539
Allows the user to select a test pattern to be transmitted in the
stream's payload.
Select one of the following patterns:
PRBS 9, PRBS 9 Inv,
15 Inv, PRBS 20, PRBS 20
31, PRBS 31 Inv, or a
The MPM-400G card only supports PRBS 31, PRBS 31
Inverted or a User Defined pattern (32-bit value).
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)
RFC-2474 redefined the TOS fields, where bits 0-5 set the
Differentiated Services Code Point (DSCP).
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.
Select to either Allow (0) or Disallow (1) IP fragments.
PRBS 11, PRBS 11 Inv,
Inv, PRBS 23, PRBS 23
User Defined (32-bit value).
PRBS 15, PRBS
Inv, PRBS