Layer 2

This section identifies the features associated with Layer 2:

MAC Layer

• Ethernet

Discovery

• Cisco Discovery Protocol

• Link Layer Discovery Protocol (LLDP)

Link Layer Control Protocol

• Bit Index Explicit Replication – Link Layer Multi-cast forwarding.

• Link Layer Control (LLC) - multiplex protocols over the MAC layer.

• Spatial Reuse Protocol (SRP)

• High-Level Data Link Control (HDLC)

• Logical link control (LLC)

• Link Agg Control Protocol (Active/Active, Active/Passive) – 18.04

Virtual Private Networks

• MPLS

  • MPLS-o-Ethernet – Deep label stacks supported

• Virtual Private LAN Service (VPLS)

• VLAN

• Q-in-Q

• Tag-rewrite (VTR) - push/pop/Translate (1:1,1:2, 2:1,2:2)

• Ethernet flow point Filtering

• Layer 2 Cross Connect

Bridging

• Bridge Domains

• MAC Learning (50k addresses)

• Split-horizon group support

• Flooding

ARP

• Proxy

• Termination

• Bidirectional Forwarding Detection

Integrated Routing and Bridging (IRB)

• Flexibility to both route and switch between groups of ports.

• Bridged Virtual Interface (BVI) Support, allows traffic switched traffic to be routed.