Beta Draft Confidential
Configuring ATM Over MPLS Gateway Solution on CBX 3500
Configuring a Layer 2 Tunnel Over MPLS Core Network
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/059-25
Table 9-9. Add Logical Port: QoS Tab Fields
Field Description
Bandwidth Allocation Enables you to assign bandwidth allocation values to each
QoS service class. Bandwidth allocation applies only if Call
Master Admission Control (CAC) is enabled during logical
port configuration (see “Congestion Control Attributes” on
page 9-30).
Options include:
• Dynamic – Enables the bandwidth allocation to change
dynamically according to bandwidth demands. Dynamic
bandwidth allocation pools the remaining bandwidth for
this logical port. This includes bandwidth that has not
already been allocated to a specific queue or assigned to a
connection.
• Fixed – Specifies the percentage of bandwidth you want to
reserve for the circuits of that service class. If all four
service classes are set to Fixed, ensure that all four values
add up to 100% so that you do not waste bandwidth. When
you set the VFR service class bandwidth to Fixed, you are
specifying the maximum bandwidth to reserve for the
circuits of this type of traffic. If the network requests a
circuit that exceeds the fixed value, the circuit cannot be
created.
If you have service classes set to Dynamic, any remaining
bandwidth percentage will be allocated to the circuits of those
service classes as needed. For example, if UFR is Fixed at
55%, and the VFR classes are set to Dynamic, the bandwidth
value assigned to UFR will be allocated to those circuits as
requested until it cannot accommodate further UFR circuits.
The remaining 45% of bandwidth will be dynamically
allocated among the circuits of the two VFR service classes.
Note: If VFR traffic is allowed to exceed its CIR, there is a
possibility that UFR traffic will be discarded. UFR traffic is a
best effort service, and cannot be guaranteed.
Routing Metric Select a Routing Metric for each class of service. Options
include:
• Admin Cost –Measures the Administrative Cost associated
with the logical port.
• End-to-End Delay – Measures the static delay of the
logical port, which consists of both propagation and
transmission delay. It is measured when the port initially
comes up. It does not include queuing delays, and
therefore does not account for port congestion.
Note: Changing the value for this attribute does not admin
down the logical port.
To Next Page
Loading...
