I have been working with MGX for the last two to three months. but still i cant be clear about why do we require MGX? Are there any special features in those switches which other equipments do not support? What I mean is, the MGX are very costly, i could not justify the cost-benifit factor. Could anyone help me out.
I will add my two cents from my experience to Giuseppe's good post. In one of my past jobs we had an ATM core with some low end MGX at network edge (I was working on router side and was not an admin in the ATM core, but I was cooperating with the ATM admin colleague in many cases). The core consisted of IGX's and BPX's. As far as I know, BPX is a high end pure ATM switch (i.e. all cards use ATM as layer 2). IGX's are more versatile (you can have other cards that support frame-relay for example). The MGX's are more versatile than IGX's.
I will now describe to you a characteristic application we had been using MGX's for. It was the transfer of international voice traffic. We had a circuit with Telecom Italia (it's a small world Giuseppe ). On our side the circuit would be connected to a BPX. The MGX would connect to the ATM core and to the voice equipment (I think we were using CESM cards for that last interconnection). We also had a router connected to the BPX for IP traffic. So, by using ATM VC's, we could route IP traffic over the circuit and international voice traffic without the router being involved in the processing of voice. I guess the router couldn't manage the strict voice quality requirements for this setup, while "the main function of the Circuit Emulation Service Module (CESM) is to provide a constant bit rate (CBR) circuit emulation service by converting data streams into CBR AAL1 cells for transport across an ATM network". The setup from the other side was symmetric. I mean, we had something like that for voice:
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...