Chapter 11. Metro Ethernet

Terms you'll need to understand:

  • MAN, SONET, DWDM, and CWDM

  • Transparent LAN (TLS) and directed VLAN (DVS) services

  • Q-in-Q tunneling and tag stacking

  • Ethernet over MPLS

Techniques you'll need to master:

  • Choosing a MAN service

  • Understanding the similarities and differences in access methods to MANs: access links, 802.1Q trunks, Q-in-Q, and EoMPLS

  • Understanding how Q-in-Q and EoMPLS tags frames

  • Understanding STP issues with redundant MAN connections

Until recently, most WAN and MAN (metropolitan area network) connections required you to use WAN connection services, such as Frame Relay, ATM, and dedicated leased lines. There are problems with deploying these solutions, though. First, you must use some type of Layer 3 device ...

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