What is PFC and DFC?
Policy Feature Card (PFC) Distributed Forwarding Card (DFC) Centralized Forwarding Card (CFC)
What is DFC line card?
Distributed Forwarding Card (DFC) DFCs are located in linecards, not in Supervisors. A DFC is used to hold a local copy of the forwarding tables (constructed by the MSFC) along with Security and QoS policies to facilitate local switching on the linecard.
What is Cisco PFC?
Priority flow control (PFC; IEEE 802.1bb), which is also referred to as Class-based Flow Control (CBFC) or Per Priority Pause (PPP), is a mechanism that prevents frame loss that is due to congestion. PFC is similar to 802.3x Flow Control (pause frames) or link-level flow control (LFC).
What is VSL networking?
VSL Networking Abbreviation. 1. VSL. Virtual Switch Link + 1. Switch, Cisco, Virtual.
What is SUP in Cisco switch?
The supervisor engine is the central forwading intelligence of a modular switch such as the 4500 and 6500 series, and also takes care of the control plane and other functions. Think of it as the “brains” of your switch.
What is CFC in networking?
CFC is a centralized forwarding card for the switching modules which makes IPv4 Routing over the PFC.
What is PFC QoS?
The term “PFC QoS” refers to hardware accelerated QoS. PFC QoS is implemented on various switch components in addition to the PFC and any DFCs. Note. • For complete syntax and usage information for the commands used in this chapter, see these.
How does priority flow control work?
Priority Based Flow Control (PFC) provides an enhancement to the existing pause flow control mechanism as described in 802.1x. When working with lossless traffic, the receiving side sends a pause frame (Xoff) to the transmitting side before the buffer is filled.
What is VSL in switch?
The virtual switch link (VSL) is a special link that carries control and data traffic between the two chassis of a virtual switching system, as shown in Figure 4-3. VSL is implemented as an EtherChannel with up to eight links.
What is MEC Cisco?
Multichassis Etherchannel (MEC) is the implementation name used in Cisco switch families with Virtual Switching System (VSS) capability, StackWise, and vPC are options that are deployed in enterprises and data centers across the world.
What is supervisor in switch?
A Supervisor Engine is a module that is installed in the Cisco Chassis-based Catalyst Switches or Routers. The supervisor engine contains nearly all the same components of fixed Cisco Switches or Routers.