Specifications

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Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
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Chapter 10 Cisco IGX 8400 Series IP Service
IP Service—Functional Overview
Qbin Dependencies
Qbins 10 through 15 are used by VSI on interfaces configured as trunks or ports. The rest of the Qbins
are reserved and configured by AutoRoute.
When you execute a dspsct command, it will give you the default service type and the Qbin number.
The available Qbin parameters are shown in Table 10-6.
Note The Qbins available for VSI are restricted to Qbins 10–15 for that interface. All 16 possible virtual
interfaces are provided with 16 Qbins.
MPLS Overview
MPLS enables edge routers to apply labels to packets or frames before transmission into the network.
After the packets or frames are transmitted into the network, these labels allow network core devices to
switch labeled packets with minimal lookup activity. This process integrates virtual circuit switching
with IP routing, enabling scalable IP networks over ATM backbones. By summarizing routing decisions,
MPLS enables switches to perform IP forwarding, optimizing the packet’s route through the network
core.
With MPLS, you can set up explicit data flow routes using path, resource availability, and requested
quality of service (QoS) constraints.
You can enable MPLS on an IGX node in two ways—by connecting an external label switch controller
(LSC), such as the Cisco 7204VXR, to function as an MPLS controller for all IGX nodes in the network,
or by configuring an installed URM as an MPLS controller. Support for MPLS is enabled through the
use of a common control interface, or VSI, between the IGX and the controller.
Note Setting up MPLS requires one LSC for each partition on each IGX node running MPLS in the network.
Table 10-6 Service Template Qbin Parameters
Template Object Name Template Units Template Range/Values
Qbin no. Enumeration 0–15 (10–15 valid for VSI)
Max Qbin threshold U sec 1–2000000
Qbin CLP high threshold Percent of max Qbin threshold 0–100
Qbin CLP low threshold Percent of max Qbin threshold 0–100
EFCI threshold Percent of max Qbin threshold 0 – 100
Discard selection Enumeration 1 – CLP hysteresis
2 – Frame discard
Weighted fair queuing Enable/disable 0: Disable
1: Enable