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Frame Relay

Per VC Frame Relay QoS

QoS parameters can be set on Frame Relay interfaces or subinterfaces using MQC commands. The disadvantage is that the policy applies to all the traffic of the interface, and not per virtual circuit (DLCI). For this purpose, the concept of Frame Relay map-classes was developed. A map-class contains configuration information …

LFI for MultiLink PPP

1.LFI for MultiLink PPP on Serial Interfaces PPP Multilink LFI (Link Fragmentation and Interleaving) allows a router to send big frames fragmented so that smaller, delay sensitive packets can be send between these fragments of larger frames. If LFI is not enabled, a packet would have to wait for the …

Frame Relay QoS

1. Per VC Frame Relay QoS See Per VC Frame Relay QoS 2. MQC For Frame Relay MQC can be used to apply QoS settings per interface or per VC if used in conjunction with a map-class. Special MQC configuration is available for Frame Relay interfaces in regard to Class …

Routing over Frame Relay

1. Topologies 1.1 Full Mesh The simplest Frame Relay topology is the Full Mesh topology, where each router has a dedicated virtual circuit to another router. Unfortunately this design is rarely found in real life because each additional circuit costs. Of course, having so many circuits available makes it easy …

ODR

1. What is ODR? ODR(On Demand Routing) is a routing protocol that runs on top of CDP and that is best suited for a hub and spoke topology. If the CDP traffic is already active between the routers on a Hub and Spoke network, the use of ODR makes sense …

PPPoFR – PPP over Frame Relay

1. PPPoFR PPP can be used encapsulated in Frame Relay to offer all PPP features over an existing Frame Relay network. The first feature that comes to mind is probably authentication, but PPPoFR can also be used to offer advantages such as Multilink PPP over Frame Relay or PPP compression. …

PPP Multilink

1. PPP Mulitlink One feature that PPP can offer is the posibility to bundle multiple physical links into one logical link, much like an EtherChannel interface available on the Ethernet Switches. Considering two routers connected back-to-back over more than one serial links. Each serial interface can be configured for PPP …

Multilink Frame Relay

Frame Relay can be used to group multiple physical interfaces in one logical interface, much like an EtherChannel interface available on the Ethernet Switches. It offers load-balancing and higher availability since the link will be up as long as one physical connection is up. In order to do this, bothe …

Frame Relay Encapsulations – IETF vs Cisco

When configuring a Frame Relay interface, the first thing you should do is enable Frame Relay Encapsulation. This is usually a fairly simple task, just use the classic encapsulation frame-relay command and it will work. Actually there are 3 options: The first one is MultiLink Frame Relay but this deals with …

Frame Relay 101 – part 2

If you thought the previous Frame Relay 101 would cover all basic aspects of Frame Relay, you were wrong. Here’s more info on Frame Relay and how it works, and believe me, we are looking just at the tip of the iceberg here 🙂 7. Non-Broadcast. What difference does it make? The omnipresent nowadays …