Cabletron Systems MMAC-Plus SFCS-1000, Configuration Manual

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Configuring PVCs
The ubr contract is for UBR traffic. Since this is best-effort traffic with no
bandwidth guarantees provided, this type of traffic can not be policed against
bandwidth parameters.
The
cbr <pcr01>
contract is for CBR traffic. It only uses the first leaky bucket
to assess the PCR of the combination of CLP = 0 cells plus the CLP = 1 cells.
All non-compliant cells are dropped.
The cbr0 <pcr0> <pcr01> [tag] contract is for CBR traffic. It uses the first
leaky bucket to assess the PCR of the combination of CLP = 0 cells plus the
CLP = 1 cells and to assess the group of CLP = 0 cells separately. All non-com-
pliant cells in both groups are dropped if the tag option is not set. If the tag
option is set, the non-compliant CLP = 0 cells in both groups are tagged and
the non-compliant CLP = 1 cells are dropped.
The
vbr <pcr01> <scr01> <mbs01>
contract is for VBR traffic. It uses both
leaky buckets simultaneously. The first bucket assesses the PCR of the combi-
nation of CLP = 0 cells plus the CLP = 1 cells and the second bucket assesses
the SCR and MBS of this same combination. All non-compliant cells are
dropped even if they comply with one bucket.
The vbr0 <pcr01> <scr0> <mbs0> [tag] contract is for VBR traffic. It uses
both leaky buckets simultaneously, as well. The first bucket assesses the PCR
of the combination of CLP = 0 cells plus the CLP = 1 cells, but the second
bucket assesses the SCR and MBS of CLP = 0 cells only. All non-compliant
cells are dropped even if they comply with one bucket, provided that the tag
option is not set. If the tag option is set, the non-compliant CLP = 0 cells in all
groups are tagged and the non-compliant CLP = 1 cells are dropped.