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• Static VLAN Subscriber Interfaces over Aggregated Ethernet Overview    

• Related Topics
• Static Subscriber Interfaces and VLAN Overview
• Configuring a Static or Dynamic VLAN Subscriber Interface over Aggregated Ethernet
• Example: Configuring a Static Subscriber Interface on a VLAN Interface over Aggregated Ethernet
• Guidelines for Configuring Dynamic CoS for Subscriber Access
• CoS for Subscriber Access Overview

Static VLAN Subscriber Interfaces over Aggregated Ethernet Overview

You can configure static or dynamic hierarchical class of service (CoS) on a subscriber interface represented by a static virtual LAN (VLAN) stacked on a two-link aggregated Ethernet logical interface. You must configure the aggregated Ethernet logical interface on Enhanced Queuing Dense Port Concentrators (EQ DPCs) in MX Series Ethernet Services Routers.

A static VLAN subscriber interface over aggregated Ethernet can also support one-to-one active/backup link redundancy, depending on how you configure the underlying aggregated Ethernet interface.

Guidelines for Configuring a Static VLAN Subscriber Interface over Aggregated Ethernet for Static or Dynamic CoS Support

Keep the following guidelines in mind when configuring static or dynamic CoS for a subscriber interface on a static VLAN stacked on a two-link aggregated Ethernet logical interface:

• Configure the aggregated Ethernet logical interface over two physical interfaces capable of performing hierarchical scheduling, which is only supported for ports on EQ DPCs in MX Series Ethernet Services Routers.
• Configure the aggregated Ethernet logical interface to operate in hierarchical scheduler mode instead of in the default per-unit scheduler mode.
• Configure the aggregated Ethernet logical interface with both underlying links operating in link-protect mode.
• You can apply static or dynamic CoS characteristics to a scheduler node at the aggregated Ethernet logical interface or its underlying physical interface, but not at an interface set.

Note: In the current release, hierarchical CoS is not supported for dynamic VLAN interfaces over aggregated Ethernet links.

Guidelines for Configuring an Aggregated Ethernet Logical Interface to Support a Static VLAN Subscriber Interface

The following guidelines for configuring an aggregated Ethernet logical interface also apply to configuring a static VLAN subscriber interface stacked on a two-link aggregated Ethernet logical interface:

• If you need to support one-to-one active/backup link redundancy, configure the aggregated Ethernet interface in link protection mode, which requires that the two underlying physical interfaces be designated as primary and backup links.
• In addition, if you need to support one-to-one active/backup link redundancy at the DPC level, configure the aggregated Ethernet interface on physical interfaces that reside on different EQ DPCs.

Note: One-to-one active/backup DPC redundancy is also supported with firewall filters and policy filters for static non-VLAN interfaces configured on an aggregated Ethernet logical interfaces, provided LACP is not active.