Specifications

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Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
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Chapter 8 Cisco IGX 8400 Series ATM Service
ATM Service—Functional Overview
Figure 8-2 UXM Virtual Interfaces and Qbins
Qbins are used with VIs, in situations where the VI is a VSI with a VSI master running on a separate
controller (a label switch controller or LSC). For a VSI master to handle a VSI, each virtual circuit (VC,
also known as virtual channel when used in FR networks) must receive a specific service class specified
through a 32-bit service type identifier. The IGX supports identifiers for the following service types:
• ATM Forum
• MPLS switching
When a connection setup request is received from the VSI master in the LSC, the VSI slave uses the
service type identifier to index into an SCT database with extended parameter settings for connections
matching that service type identifier. The VSI slave then uses these extended parameter settings to
complete connection setup and necessary configuration for connection maintenance and termination on
the fly.
The VSI master normally sends the VSI slave a service type identifier (either ATM Forum or MPLS),
QoS parameters (such as CLR or CDV) and bandwidth parameters (such as PCR or MCR).
Qbin Templates
A Qbin template defines a default configuration for the set of Qbins attached to an interface. When you
assign an SCT to an interface, switch software copies the Qbin configuration from the Qbin template and
applies the Qbin configuration to all the Qbins attached to the interface.
Qbin templates only apply to the Qbins available to VSI partitions, meaning that Qbin templates only
apply to Qbins 10–15. Qbins 0–9 are reserved and configured by Automatic Routing Management
(ARM).
0
15
qbins
Port 1
Port 2
Port 3
Port 4
35714
Trunk 4.2
Line (port) 4.4
UXM-E
Slot 4
Virtual trunk 4.1.1
Virtual trunk 4.1.2
Virtual trunk 4.1.3
Port 5
Port 6
Port 7
Port 8
0
15
qbins
0
15
qbins
0
15
qbins
0
15
qbins
VI_1
VI_2
VI_3
VI_4
VI_16