The following design components must be considered to achieve high availability when extending Layer 2 networks:
• Maximum transmission unit (MTU) evaluation for intersite core transport
• Core routing
• Convergence optimization
This chapter focuses on the components listed to achieve high availability.
As in any Ethernet encapsulation technology, MTU is an important aspect to consider. The packet-switched network (PSN) must be configured with an MTU that is large enough to transport a maximum-size Ethernet frame that is encapsulated with a control word, a pseudowire (PW) demultiplexer, and a tunnel encapsulation. If the tunneling protocol is Multiprotocol ...