10
votes
Accepted
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 ...
- 116
8
votes
Accepted
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 ...
- 66.2k
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 ...
- 66.2k
4
votes
Leased Lines vs MPLS
A leased line offers a service where the bitstream that comes out is exactly the bitstream that comes in. Fixed throughput, fixed latency. There is also extremely limited latency added by intermediate ...
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4
votes
Practically speaking, what is MPLS?
I've always explained MPLS as "layer-2 routing". From the 30,000ft view, that's pretty close to what it does. But strictly speaking, MPLS isn't a layer-2 - there is no layer-1 carrying MPLS ...
- 31.1k
4
votes
Why is MPLS label added between layer 2 header and layer 3 header of OSI model and not between headers of layer 3 and 4 of OSI model?
MPLS is a layer-2 protocol. However, no layer-1 carries MPLS directly, so it gets tacked on to various other layer-2 protocols. (hence "layer-2.5") Adding it after a layer-3 header would ...
- 31.1k
3
votes
Why does MPLS use labels to make forwarding decisions instead of destination IP addresses?
It's MPLS, Multi-protocol Label Switching. The entire point of it is to switch multiple protocols based on their label. It doesn't even have to be IP traffic involved, it can be ATM or something ...
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3
votes
Accepted
Layer 2 MPLS VPN versus Layer 3 MPLS VPN
However, the question is, are L2/L3 MPLS like two different services that we can purchase from our ISP?
Yes, exactly.
If so, based on what would we choose, whether to use a L2 MPLS or L3 MPLS?
That ...
- 66.2k
2
votes
Practically speaking, what is MPLS?
You are correct, MPLS is a service offered by ISPs. It is used by enterprises that have multiple sites that they want to connect together.
In the perspective of customer (enterprises), the idea of ...
- 471
2
votes
Leased Lines vs MPLS
Leased lines (also known as private wires) have been around since the days of the telegraph.
The same transmission technology is used in the local loop (and sometimes in the backhaul from the local ...
- 360
2
votes
How can GMPLS unify signalization plain of all telecommunications network technologies?
The idea of GMPLS is that it's hardware and media agnostic. Optical networks are just one kind of media that GMPLS can be used on.
- 66.2k
1
vote
In what situations is MPLS label erased from the top of the label stack in MPLS?
MPLS label is erased from the top of the label stack upon MPLS tunnel termination.
Sometimes, to save an additional MPLS table lookup on PE routers, a PHP(Penultimate Hop Popping) mechanism is ...
- 1,591
1
vote
Leased Lines vs MPLS
The true point-to-point lease line died decades ago.[*] A T1 between sites hasn't been an end-to-end copper circuit for a long, long time. (In fact, T1's haven't been "T1's" for decades. It'...
- 31.1k
1
vote
Leased Lines vs MPLS
Just a quick note on leased lines; in the past when there was no fiber infrastructure, there were thousands of copper cables running between nodes and cities. As a company, for your critical data, you ...
- 335
1
vote
Accepted
why SR LSP no tunnel interface? but SR TE need it?
SR-LSP (or LDP-LSP) tunnels are automatically created based on Node-SIDs (or LDP labels) advertised by other nodes. These are loose tunnels which follow the shortest IGP path to the destination. Hence ...
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