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 ...
- 161
6
votes
Is it possible to implement IPSEC over MPLS?
If your MPLS L3VPN supports IP transport from endpoint A to/from endpoint B at the other site (which is their primary purpose), there's nothing to stop you from letting A and B talk IPSec (in one or ...
- 8,826
5
votes
Accepted
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 ...
- 400
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 ...
- 67.1k
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 ...
- 2,449
4
votes
How to isolate in VRF clients with public IPs in MPLS ISP network
There are several different ways to accomplish this. Here's one way, assuming you're already running MP-BGP:
In the ISP VRF, have separate route tags for import and export, say 100 and 200 ...
- 67.1k
4
votes
Accepted
Many ways of configuring MPLS pseudowires, and choosing only one
vlan 50 method of configuration consolidates all related statements onto the PE-CE logical interface. This is the easiest to understand if you are configuring manually or doing any kind of ...
- 5,449
4
votes
Differences between BGP(routing protocols) and vpn mpls?
As @ronmaupin suggests, you are talking about two different things.
Routing protocols exchange routing information so that routers can populate their routing tables. They have nothing to do with the ...
- 67.1k
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 ...
- 31.7k
3
votes
Accepted
Should the Loopback address be unique across the network?
TL;DR
Be very careful with that idea, unless you know EXACTLY what you are doing.
Longer:
A) Adresses are in VRFs
It will cause no harm if these sets of loopback interfaces are on PE routers (or ...
- 8,826
3
votes
Accepted
BGP and Inter-VRF Routing
Use the command
neighbor x.x.x.x allowas in
This tells the router not to discard prefixes with its own ASN in the path.
- 67.1k
3
votes
Why VPWS service - MPLS has a two ethernet frame headers?
Why there is a need for again source MAC and destination MAC
addresses?
The original source and destination MAC addresses have no meaning while the packet is in the tunnel.
My understanding is ...
- 82.6k
3
votes
What is the difference between MPLS, MPLS VPN and IPsec VPN tunnel?
From the customer point of view, MPLS is a private site-to-site connection across a provider/carrier network. The connection can be layer 2/switched (most commonly) or layer 3/routed (MPLS VPN might ...
- 82.6k
3
votes
What is the difference between MPLS, MPLS VPN and IPsec VPN tunnel?
Multi Protocol Label Switching is a switching technology used mostly by service providers. It allows them to build private WANs that are agnostic to the network protocol and type of addressing used. ...
- 67.1k
3
votes
Accepted
Juniper MX L2 policer over-policing small frames
Actually found the answer to this today:
https://www.juniper.net/documentation/us/en/software/junos/routing-policy/topics/task/configuring-the-accounting-of-policer-overhead.html
In order to address ...
- 76
2
votes
Does one need to personally manage MLPS VPN connection to have MPLS between building or can the ISP provide this connection for you?
Unless you are going to lay your own cabling and connect the sites together, you will need to speak to a service provider to connect these two up. Usually the WAN connection will be managed by the ...
- 2,016
2
votes
how to identify addresses on an ethernet frame
The first six octets are the destination address. Your example has the broadcast destination address.
The next six bytes are the source address. In your example: 0824:F5CE:D3AC.
The next sequence of ...
- 98.7k
2
votes
Accepted
2547oDMVPN with Loopback as iBGP source interface
Edit based on the provided bug link:
This is obviously a bug. The workaround is given, and I think you need to use the tunnel interface as prescribed in the workaround until there is a code fix. We ...
- 98.7k
2
votes
In MPLS VPN, Which one become first? MPLS Label tag or VPN encapsulation?
I think you are confused.
In an MPLS VPN the layer 2 or layer 3 traffic being carried over an Label Switched Path is not encapsulated - MPLS does not provide an encapsulation method - it is a ...
- 5,290
2
votes
Route Distinguisher and Route Target in MPLS network
The Route Distinguisher would be unique within the MPLS VRF across the MPLS network. In regard to IPv4 the RD is an 8 byte value which is combined with an 4 byte IPv4 address to create a unique VPNv4 ...
- 636
2
votes
Can I Use BGP as an IGP - Multisite w Redundant Layer 3 MPLS WANs
All I can do is explain how a pretty successful large network does it.
Each of the hundreds to thousands of end-sites on an MPLS VPN is in the same private BGP AS, so site-to-site traffic is switched ...
- 98.7k
2
votes
Why VPWS service - MPLS has a two ethernet frame headers?
VPWS is a point to point L2VPN, using this technology two geographically remote hosts from the same IP subnet are able to communicate as if they were connected to the same switch.
This thing is ...
- 1,604
2
votes
Accepted
VPN MPLS L3 Routing
Hi an welcome to network engineering!
TL;DR
Customer1's 1.1.1.2 cannot communicate with Customer2's 10.1.2.2, and Customer1's R2 is not supposed to know about Customer2's 10.1.2.x subnet.
Longer: ...
- 8,826
2
votes
Accepted
Are mpls tunnels the only option for reachable L3vpn next-hop?
You can also use MPLS over UDP, which was defined in RFC 7510 and is arguably a better choice than GRE as it has better hashing properties.
Note that tge VPN label is still necessary as it defines ...
- 36
2
votes
Route Reflector not reflecting BGP-LU (Labelled Unicast) prefixes
To simplify the explanation, let's just pretend that only RR1 and RR3 exist (and let's forget about RR2 and RR4 for a second).
Similarly, let just pretend ASBR1 and ASBR3 are the only ASBRs (and let'...
- 339
2
votes
MPLS LDP transport address should it be always loopback IP
Since the LDP is running using TCP, it needs to establish session with every LDP speaking neighbor. Sometimes those neighbors are one hop away and you can use the point-to-point addresses configured ...
- 398
2
votes
Is it possible to implement IPSEC over MPLS?
Yes. Cisco's VRF-Aware IPsec documentation indicates:
The VRF-Aware IPsec feature introduces IP Security (IPsec) tunnel
mapping to Multiprotocol Label Switching (MPLS) Virtual Private
Networks (VPNs)....
- 4,389
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