Layer 2 Theory And Standards Adherence - Cisco ASR 9000 Series Configuration Manuallines

Layer 2 Theory and Standards Adherence

• You must be in a user group associated with a task group that includes the proper task IDs. The command
• Confirm that at least one of these line cards is installed on the router:
• You know the interface IP address.
• You know how to apply the specify the generalized interface name with the generalized notation
Layer 2 Theory and Standards Adherence
To configure Ethernet interfaces, you must understand these concepts:
Ethernet Technology Overview
Ethernet is defined by the IEEE 802.3 international standard. It enables the connection of up to 1024 nodes
over coaxial, twisted-pair, or fiber-optic cable.
The Cisco ASR 9000 Series Routers support Gigabit Ethernet (1000 Mbps) and 10-Gigabit Ethernet (10 Gbps)
interfaces.
Carrier Ethernet Services
Cisco endorses Metro Ethernet Forum (MEF) Carrier Ethernet (CE) 2.0 services:
• E-LINE: An E-Line is a point-to-point Ethernet service that connects exactly 2 UNIs.
• E-LAN: An E-LAN is a multipoint-to-multipoint service that connects a number of UNIs (2 or more)
• E-TREE: An E-Tree is a rooted multipoint service that connects a number of UNIs providing sites with
• E-ACCESS: An E-Access Service is an OVC-based service with at least one UNI OVC End Point and
When discussing an Ethernet WAN (EWAN), these terminologies should be used:
• CE (customer edge): The customer device connecting to the service provider
• PE (provider edge): The service provider device connecting to the customer
• UNI: The connection between the CE and PE
• AC: The physical or virtual circuit attaching a CE to a PE
• Multiplexed UNI: A UNI supporting multiple VLAN flows
• Pseudowire: A term used to indicate an end-to-end path in a service provider network
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
6
reference guides include the task IDs required for each command.
If you suspect user group assignment is preventing you from using a command, contact your AAA
administrator for assistance.
• 4-port 10-Gigabit Ethernet (4 x 10 GE) line card
• 8-port 10-Gigabit Ethernet (4 x 10 GE) line card
• 40-port 1-Gigabit Ethernet line card
rack/slot/module/port .
providing full mesh connectivity for those sites.
hub and spoke multipoint connectivity.
one ENNI End Point.
The Carrier Ethernet Model