Cisco 10000-2P2-2DC Software Guide - Page 502
Configuring MLP on LNS, MLPoE LAC Switching, Restrictions for MLPoE LAC Switching
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MLPoE LAC Switching Chapter 22 Configuring Multilink Point-to-Point Protocol Connections • Virtual-access bundle support for existing MLP features is not included in this release. • Due to changes in route or switching to backup because of problems on the line, dynamic changing of the physical tunnel interface (the Gigabit Ethernet and ATM on which the L2TP tunnel for MLPoLNS bundle is negotiated) can happen. These changes require the bundles to renegotiate. • For multi-member bundles, carve out and reserve the bandwidth from the physical interface, which is the trunk interface on which the L2TP tunnel is negotiated. The bandwidth available for use on the trunk interface or other connection is reduced by the sum of the bandwidth reserved for the bundle. Bandwidth available = Gigabit Ethernet or ATM VC - Bandwidth of bundle Bandwidth available = Gigabit Ethernet or ATM VC - (Bandwidth of bundle 1 + Bandwidth of bundle 2) • Packet loss during oversubscription and congestion is not fixed. • MLP on LNS sessions are torn down when there is a Hw-module reset or a physical OIR of an ATM line card in a tunnel interface. Configuring MLP on LNS You can refer to the following sections for configuring MLP on LNS: • Required Configuration Tasks for LNS, page 5-29 • Optional Configuration Tasks for LNS, page 5-30 For a configuration example of the MLP on LNS feature, see the Configuration Example for MLP on LNS, page 22-39. MLPoE LAC Switching In the Cisco IOS 12.2(33)SB release, MLP bundling on LNS was supported. In the Cisco IOS 12.2(33)SB2 release, there is added support for switching MLPoEoVLAN sessions received on the LAC to the LNS. However, due to PXF resource limitations, this feature is supported on the PRE3 platform only. For a configuration example of the MLP over Ethernet (MLPoE) LAC Switching feature, see Configuration Example for MLPoE LAC Switching, page 22-41. The MLPoE LAC Switching is described in the following section: • Restrictions for MLPoE LAC Switching Restrictions for MLPoE LAC Switching In Cisco IOS Release 12.2(33)SB2, the MLPoE LAC Switching feature has the following restrictions: • MLPoVLAN encapsulation (between the CPE and LAC) is supported. MLPoEoE and MLPoEoQinQ is not supported. • L2TP tunnel over Gigabit Ethernet (between the LAC and LNS) and ATM is supported. However, VLAN and QinQ encapsulations for the L2TP tunnel are not supported. • Similar to the MLP on LNS feature, bundles are only supported with Gigabit Ethernet and ATM as the trunk between the LAC and LNS. 22-24 Cisco 10000 Series Router Software Configuration Guide OL-2226-23
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