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Leased Lines vs MPLS

One major difference between the two is that leased lines are generally more expensive than MPLS and can also be more reliable and offer higher bandwidth, because they are not shared. MPLS on the ...
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9 votes
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Why are my equal cost LSP's not load balancing equally when using auto-bandwidth?

The problem is the: [edit protocols rsvp] load-balance bandwidth If you look at the Juniper documentation for Unequal Cost Load Balancing RSVP LSPs, it states: For uneven load balancing using ...
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9 votes
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Why does MPLS need an IGP (like OSPF) in order to work?

Why does MPLS need an IGP (like OSPF) in order to work? In an MPLS network, OSPF is not used to route customer traffic. It is only used to provide routing for the internal provider network so that ...
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8 votes
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Why does MPLS use labels to make forwarding decisions instead of destination IP addresses?

I think what you're really asking is, "Why use MPLS instead of traditional routing?" One of the major reasons (probably the reason) people use MPLS is address independence. You can have two ...
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6 votes

In MPLS VPN, Which one become first? MPLS Label tag or VPN encapsulation?

I think your question is not truly correct. First of all, as explain here "an MPLS VPN is a VPN that is built on top of an MPLS network, usually from a service provider, to deliver connectivity ...
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Regarding MPLS L2 Vs L3

Here is a short answer: A L2 VPN acts like a layer 2 network. That is, all the devices that connect to the VPN would normally be on the same subnet, and broadcasts go to all devices. In a L3 VPN, ...
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6 votes
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EoMPLS, MSTP, and RPVST

The ME3600s don't support the forwarding of STP or MST frames through EVC. Port based PWE3s will transport STP frames but you will have to chew up a lot of ports. Really you should be engaging your ...
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6 votes
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Differences between MPLS and VPLS

MPLS is a virtual "layer 3" network. The customer addresses packets by IP. The PE equipment have customer IPs and serve as customer routers. The MPLS admin needs to manage at least a little of the ...
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MPLS traffic engineering

Traffic steering is actually the task that is beyond MPLS TE itself. TE tunnel just provides the path, and it's up to other protocols and techniques to steer actual traffic. The same is true for ...
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What is the difference between LFA and FRR?

LFA - Loop-Free Alternate(s) (also sometimes called LFA-FRR which may add to your confusion) is a feature of IGPs such OSPF and IS-IS to allow nodes to calculate alternative paths to each prefix in ...
5 votes

MPLS-TE backup LSP protection behavior

Do all TE routes work this way? Does the original LSP path (w/o TE) have to be only one hop away? No the original LSP path can be multiple hops away. MPLS TE is a very complicated subject, and I can ...
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Is this MPLS Router configuration correct?

Let's clear up some terminology first, sorry if I repeat some things that you already know: LER: This is a "Label Edge Router". These terminate MPLS LSP's. LSR: This is a "Label Switching Router". ...
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5 votes
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Have I desiged correctly my MPLS network?

This is quite complex to answer in simple set of questions, but let's try: Yes, it's possible to have internet connectivity by means of MPLS cloud, but it either means you need to self-deploy MPLS L3 ...
5 votes
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How can I find out if a path across an internet uses MPLS?

You cannot really tell the path that a packet may travel or has traveled. The packet has no record of that, and the path could change from one packet to the next because routing is dynamic. Routers ...
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5 votes
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SONET/T-Carrier differences - MPLS/VPLS bandwidth

Very briefly, SONET/SDH is a high bandwidth optical WAN technology. T-carrier is an electrical (digital) WAN technology. SONET/SDH is (was) typically used for backbone and inter-provider circuits. ...
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5 votes

Why does MPLS need an IGP (like OSPF) in order to work?

So, why to use also MPLS if we already had OSPF? Downsides of IGP Metric based: There will be a segment underutilized as you can see from the link cost. Traffic for the different networks attached ...
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5 votes
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SD-WAN vs MPLS VPN

Ron already mentioned this in the comments but let me try to offer a little more explanation. SD-WAN, from a vendor perspective, is offered as a solution which involve a set of technologies ...
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Pseudowire and LSP

A pseudowire (PW) uses a label-switched path to emulate a point to point circuit. They are a particular type of LSP. You can say all PW are LSPs, but all LSPs are not PWs.
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5 votes
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MPLS : who owns the ingress & egress routers?

For example, if company X uses ATT as the provider for MPLS, then who owns these edge routers ? If you rent an MPLS line/link, the routers belong to your provider. Most often, you get an Ethernet ...
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5 votes
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What is the difference between Targeted LDP and Directed LDP in MPLS?

Directed LDP is not a term that appears in the LDP specification (RFC 5036.) Perhaps you're trying to understand the difference between Basic Discovery which uses LDP Link Hellos and Extended ...
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5 votes
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Transporting an Ethernet Port in a LDP Based VPLS Instance on Juniper MX routers

Yes, LDP VPLS is a pretty standard deployment. Where it can get confusing is the various types of PE-CE interface encapsulation depending upon the type of service you're running. In your case of a ...
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5 votes

what is meaning of MPLS when compared to SD-WAN? is it dedicated MPLS or MPLS VPNs

Can anyone tell me if there is real world WAN solutions for 3 cases above There are many. Large organizations use MPLS in their own networks, especially when they provide "services" to ...
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4 votes

Is this MPLS Router configuration correct?

No, the picture does not use LER in the right place. In MPLS networks carrying MPLS VPNs, the PE is actually the first router doing MPLS, and is thus the one called Label Edge Router.
4 votes
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Maximum number of MPLS VPNs provided by a router?

What's the maximum amount of MPLS VPNs a router can provide? Short answer: "it depends". To be honest, it sounds like you're getting in way over your head, but I'll answer the question as ...
4 votes
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What is an "Internet breakout"

In many large networks that span nationally or globally, all traffic including Internet traffic, flows from remote sites to a central hub, such as a data center, where Internet traffic then leaves the ...
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4 votes
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BGP Question please

BGP does not care if the peer is directly attached or not, as long as peers can communicate with each other, so from BGP point-of-view both topologies are strictly identical. This is why there's an ...
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4 votes
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understanding Policy map bandwidth , police, shape commands

When decoding QOS policies I like to reverse engineer it. Start with the last command that was configured in regards to the QOS. This is usually the service-policy statement on the interface. service-...
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Does one need to personally manage MLPS VPN connection to have MPLS between building or can the ISP provide this connection for you?

MPLS support is only rarely a requirement for enterprise equipment, especially relatively simple setups like the one you describe. MPLS itself is usually hidden away in the carrier networks. For your ...

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