16-13
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 16 Fragmenting and Interleaving Real-Time and Nonreal-Time Packets
Multilink PPP-Based Link Fragmentation and Interleaving
MLP Over Serial-Based LFI
MLP over serial-based LFI uses the fragmentation and interleaving capability of MLP to integrate
real-time packets (such as voice packets) and nonreal-time packets (such as data transfers) on the same
link while reducing real-time packet latency.
MLP allows you to bundle T1 interfaces into logical groups. As indicated in Figure 16-3, you can
configure a MLP bundle with up to 10 T1 links. Using MLP, you can create a degree of redundancy by
configuring a MLP bundle that is made up of T1 links from more than one line card. If one line card
stops operating, the part of the bundle on other line cards continues to operate.
Figure 16-3 shows a MLP bundle that consists of T1 interfaces from three T3 interfaces.
Figure 16-3 MLP Bundle
Feature History for MLP Over Serial-Based LFI
Performance and Scalability for MLP Over Serial-Based LFI
To enhance performance and scalability for MLP over serial-based LFI, configure the hold-queue
command in interface configuration mode for all physical interfaces, except when configuring the ATM
OC-12 line card. The OC-12 does not require the hold-queue command. For example:
Router(config-if)# hold-queue 4096 in
For more information, see the “Scalability and Performance” chapter in the Cisco 10000 Series Router
Broadband Aggregation, Leased-Line, and MPLS Configuration Guide.
Cisco IOS Release Description Required PRE
Release 12.0(23)SX The MLP over serial-based LFI feature was introduced on
the PRE1.
PRE1
Release 12.2(27)SBB This feature was introduced on the PRE2. PRE2
Release 12.2(31)SB2 This feature was introduced on the PRE3 and the valid
multilink interface values changed from 1 to 9999
(Release
12.2(28)SB and later) to from 1 to 9999 and
65,536 to 2,147,483,647.
PRE3
T1
T1
T1
T1T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
T1
You can combine up to ten T1s to create a Multilink bundle.
The bundle can include T1 channels assigned to different T3s.
38545
Multilink bundle
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