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10 votes
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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 ...
masrad's user avatar
  • 116
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 ...
Ron Trunk's user avatar
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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 ...
Ron Trunk's user avatar
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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 ...
ar_'s user avatar
  • 1,133
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 ...
Law29's user avatar
  • 406
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 ...
Benjamin Dale's user avatar
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 ...
Łukasz Bromirski's user avatar
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 ...
Ron Maupin's user avatar
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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. ...
Ron Trunk's user avatar
  • 67.6k
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 ...
DRP's user avatar
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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 ...
surya's user avatar
  • 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.
Ron Trunk's user avatar
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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 ...
Zac67's user avatar
  • 84.8k
5 votes

What's the difference between L2TP and L2TPv3?

Let's say that it is a 'new protocol heavily based on L2TPv2'. It shares a lot of the messages, constructs, flows with L2TPv2 but it is not strictly backwards compatible. It does have an L2TP '...
KillianDS's user avatar
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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 ...
Jeff Wheeler's user avatar
  • 5,468
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 ...
Jordan Head's user avatar
  • 7,099
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 ...
Ron Trunk's user avatar
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4 votes

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 ...
Jeremy Gibbons's user avatar
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-...
Ryan's user avatar
  • 56
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 ...
JFL's user avatar
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4 votes
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LDP based VPLS between Cisco IOS XE and Juniper MX

No outgoing label indicates that Junos doesn't have a label for the loopback you are targeting on the Cisco (your x.x.x.x address) Confirm the following: Your NNI interface from the Juniper has ...
Benjamin Dale's user avatar
4 votes
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WAN lines types - understanding leased line/circuit

A real leased line, could be performed with TDM on a line with for example SDH, TDH or SONET with a CSU/DSU on the customer site (a layer 1 leased line?) This depends - usually a (rare) leased ...
Zac67's user avatar
  • 84.8k
4 votes
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What is the difference between L2VPN and EoMPLS?

You are correct. L2VPN is the technology, and VPLS and VPWS are services configured using that technology. When someone talks about configuring an L2VPN, they could be talking about configuring any of ...
DragonFist616's user avatar
4 votes

BGP Juniper not reflecting to Cisco?

Ok so i now know what the problem was... The thing is that Juniper and Cisco behaves a lot differently Cisco: if you have a BGP route learned but it already is in the routing table (from for example ...
Cariffo's user avatar
  • 51
4 votes

Traceroute doesn't show one hop?

traceroute works by using probe packets with increasing TTL values. The hop where a packet's TTL times out is supposed to return an time exceeded ICMP message which is processed and displayed by ...
Zac67's user avatar
  • 84.8k
4 votes

Traceroute doesn't show one hop?

That is how MPLS works. The packet doesn't get routed at that point, it is label switched. Traceroute works by having the packet TTL expire and an ICMP message is sent back saying that the packet ...
Ron Maupin's user avatar
  • 99.8k

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