Cisco 10000 - Manual (Page 421)

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Cisco 10000 Series Router Software Configuration Guide
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Chapter 19 Configuring Multilink Point-to-Point Protocol Connections
MLP Bundles
Feature History for Multilink PPP
MLP Bundles
MLP combines multiple physical links into a logical bundle called an MLP bundle (see Figure 19-1 ). An
MLP bundle is a single, virtual interface that connects to the peer system. Having a single virtual
interface enables fancy queuing and QoS to be applied to the traffic on the virtual interface (for example,
policing and traffic shaping can be applied to the traffic flows). Each individual link to the peer system
might be doing some form of fancy queuing, but none of the links knows about the traffic on the other
parallel links. Fancy queuing and QoS cannot be applied uniformly to the entire aggregate traffic
between the system and its peer system. A single virtual interface also simplifies the task of monitoring
traffic to the peer system (for example, traffic statistics are all on one interface).
Figure 19-1 Multilink PPP Bundle
An endpoint discriminator is used to identify the member links of the MLP bundle.
Restrictions for MLP Bundles
The router supports links equal to T1/E1 or less for MLPPP bundling. You cannot bundle high-speed
links (for example, E3) because the router can store only 50 ms of data based on the E1 speed.
Cisco IOS Release Description Required PRE
12.0(23)SX The MLP over Serial feature was introduced on the
Cisco 10000 series router. PRE1
12.2(28)SB The MLP over Serial, Single-VC MLP over ATM VCs, and
Multi-VC MLP over ATM VCs features were introduced
on the PRE2. PRE2
12.2(31)SB2 Support was added for the PRE3 and the valid multilink
interface ranges for MLP over serial or multi-VC MLP
over ATM 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
12.2(33)SB The MLPPP on LNS feature was introduced on the Cisco
10000 series router that is supported on the PRE3 and
PRE4. This feature is not supported on the PRE2. PRE3 and PRE4
12.2(33)SB2 The MLPoE LAC Switching feature was introduced on the
Cisco 10000 series router. PRE3
132316
Point-to-Point