Frame-Relay PVC bundle


In this short piece i would like to show how Frame-Relay PVC bundles work. A PVC bundle is exactly what the name says. Its a bundle of PVC’s, with each PVC handling a certain Precedence, MPLS EXP or DSCP. A requirement for the PVC bundle is that all IP Precedence or DSCP values will be handled by one of the PVC’s, so you need to set the “default” PVC unless
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Service Provider emulation of a frame-relay network using MPLS.


One of the cool things about MPLS is its versatility. In this post i will show how its possible for a service provider to support legacy frame-relay installations without actually having any frame-relay switches. I will establish an MPLS core and show how a customer with three sites, one hub site and two spoke sites, will never even know that the core is running MPLS and not end-to-end frame-relay.
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Frame-relay compression and fragmentation.


Link optimization on frame-relay. Using frame-relay, bandwidth is especially a concern. It is possible to optimize this bandwidth in several ways. I will concentrate this post about compression and fragmentation. First off, with compression on frame-relay there several methods of accomplishing this.
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PVC Interface Priority Queueing – PIPQ


New technology i just learned about! Its called PIPQ, and stands for PVC Interface Priority Queueing. As the name implies, its a Queueing method, and its only for frame-relay. It basically functions in the same way as a PQ scheme, in that it has 4 queues, high, medium, normal and low.
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Back in the labs.


Im pretty much back at my lab practice again. Doing Narbik’s labs. Last 5-6 labs is all about frame-relay, including FRTS, PIPQ (Which i never encountered before), fragmentation and compression. All good stuff. As someone on twitter mentioned, its really amazing that frame-relay is still on the lab exam.
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