Cisco 10000-2P2-2DC Software Guide - Page 494

Multi-VC MLP over ATM Virtual Circuits Chapter 22 Configuring Multilink Point-to-Point Protocol Connections • The router supports a maximum of 8192 bundles per system and 8192 member links per system. • Each member link can have a bandwidth rate up to 2048 kbps. • The router only supports member links with the same encapsulation type. • MLP PVCs cannot be on-demand VCs that are automatically provisioned. • Associating MLP over ATM PVCs with ATM virtual paths (VPs) is discouraged, though not prevented. • The valid multilink interface values are 10000 to 65534. For example: Router(config)# interface multilink 10004 The values higher than 65534 are used for multi-member bundles • Cisco IOS software supports a maximum of 4096 total virtual template interfaces. • You cannot manually configure the bandwidth on a bundle interface using the bandwidth command. • If a virtual template attached to a member link specifies a bandwidth, the router does not clone the specified bandwidth to the MLP bundle and the member links. • You cannot apply a virtual template with MLP configured to an MLP bundle. • If link fragmentation and interleaving (LFI) is enabled, only one link is used for interleaving. For more information, see the "Fragmenting and Interleaving Real-Time and Nonreal-Time Packets" chapter in the Cisco 10000 Series Router Quality of Service Configuration Guide. • We strongly recommend that you use only strict priority queues when configuring MLP over ATM-based LFI. For more information, see the "Prioritizing Services" chapter in the Cisco 10000 Series Router Quality of Service Configuration Guide. Multi-VC MLP over ATM Virtual Circuits The Multi-VC MLP over ATM virtual circuits (VCs) feature enhances the MLP over Serial interfaces feature by enabling you to configure multilink Point-to-Point Protocol (MLP) on multiple ATM VCs. By doing so, you can aggregate multiple data paths (for example, PPP over ATM encapsulated ATM VCs) into a single logical connection called an MLP bundle (see the "MLP Bundles" section on page 22-3). An MLP bundle can have up to 10 member links. Multi-VC MLP over ATM provides the following functions: • Load balancing-MLP provides bandwidth on demand and uses load balancing across all member links (up to 10) to transmit packets and packet fragments. The multiple links come up in response to a defined load threshold. MLP mechanisms calculate load on both inbound and outbound traffic, or on either direction as needed for traffic between specific sites. Because MLP uses all member links to transmit packets and fragments, MLP reduces transmission latency across WAN links. • Increased redundancy-MLP allows traffic to flow over the remaining member links when a port fails. You can configure the member links on separate physical ports on the same line card or on different line cards. If a port becomes unavailable, MLP directs traffic over the remaining member links with minimal disruption to the traffic flow. MLP mechanisms preserve packet ordering over an entire bundle. • Link fragmentation and interleaving-The MLP fragmentation mechanism fragments packets and sends the fragments at the same time over multiple point-to-point links to the same remote address. MLP multilink encapsulates large nonreal-time packets and fragments them into a small enough size to satisfy the delay requirements of real-time traffic. The smaller real-time packets remain intact and 22-16 Cisco 10000 Series Router Software Configuration Guide OL-2226-23