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11 votes
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load-balancing on congestion, OSPF over MPLS

... The load balancing works when I replace the MPLS by ATM switches. This doesn't sound like a parallel comparison, because routers don't care whether you're forwarding through an ATM PVC or an ...
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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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  • 6,440
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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7 votes
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Is it possible to stitch a L2VPN connection into a VPLS domain on Juniper MX

So it seems the way to go is to use a logical tunnel interface on MX. Just put one end of the lt Interface in the VPLS instance and the other end in the L2VPN instance: lt-1/2/0 { mtu 1514; ...
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6 votes

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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  • 5,270
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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  • 161
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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  • 406
6 votes

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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  • 1,118
6 votes

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 ...
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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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5 votes
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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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  • 6,440
5 votes

Subnetting Issue with legacy network and poor planning

Based on the information you provide, I would go with option #3. Add a secondary /22 or /23 IP range to the interface. Test the new range for expected results (especially since some servers/services ...
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  • 26.7k
5 votes
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Do MPLS LSRs require a Layer 3 IP routing protocol?

In theory you can run MPLS without an IGP, any sane network admin would not though. MPLS labels can be assigned through: LDP RSVP-TE Generally a router runs IGP to populate the Routing Information ...
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  • 7,448
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 ...
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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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  • 92.9k
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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  • 62.1k
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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  • 1,481
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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  • 400
5 votes

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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  • 62.1k
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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  • 5,153
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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  • 6,440
4 votes

How can I view not-accessible SNMP indexes? MPLS implementation

It may happen that the OID`s you are querying are not implemented on the device. It may happen that either those are not supported or not implemented. Just in case for your verification you can use "-...
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4 votes
Accepted

Does Juniper set a control word on VPLS pseudowires

negotiation of the control-word between the BGP VPLS PE routers is added in Juniper MX series starting from Junos 14.1. so only BGP-signaled VPLS. BR
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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.
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4 votes
Accepted

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 ...
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4 votes
Accepted

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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  • 62.1k
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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  • 18.3k

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