Cabletron Systems SSIM-A2-01, Installation And User Manual, Page: 39 / 88

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SmartStack SSIM-A2-01/SSIM-A8-01 Console Configuration
Traffic profiles are used in three different situations, listed below, which again
require three different methods for assigning the correct traffic profiles to the
correct VCC.
1. PVCs are assigned a designated traffic profile when they are created during
startup. The designated profile is simply specified in the configuration.
2. For SVC incoming calls, the module software tries to find the traffic profile that
best matches the traffic parameters in the call. If the difference between the
incoming rate and the closest match is above a certain threshold, the call is
rejected with the cause code “User cell rate not available”. This behavior can be
controlled with the VAP configuration parameters MaxReceiveRateDifference
and MaxTransmitRateDifference.
3. For SVC outgoing calls, a traffic profile mapping is used for SVC creation. The
traffic profile mapping is defined per VAP, and contains the following
parameters:
Address Mask: The VCC destination address is logically ANDed with the
Address Mask before being compared to the ATM address parameter of the
traffic profile map. This can be used to “mask” parts of the 20 2-digit
hexadecimal number ATM address taking part in the comparison.
ATM Address: This ATM address is compared to the destination address (after
it has been ANDed with the address mask) for the VCC to be opened.
VCC Type: This VCC type must match the type of the VCC to be opened
(wildcards are possible).
Traffic Profile List: The listed traffic profiles are tried in succession until one
is accepted by the destination end station.
These parameters are used when a new VCC is to be opened. A traffic profile map
will be selected if the VCC type and ATM address (masked by the address mask)
match, and the traffic profile from the traffic profile list will be tried.