Questions tagged [mpls-vpn]

For questions about MPLS VPN, where MPLS VPN is a flexible method to transport and route several types of network traffic using an MPLS backbone. For instance, Point-to-point MPLS VPNs employ VLL (virtual leased lines) for providing Layer2 point-to-point connectivity between two sites.

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53 views

Route Reflector not reflecting BGP-LU (Labelled Unicast) prefixes

I was reading about the Inter-AS MPLS VPN Option C from book ' MPLS in the SDN Era' . In it , the author establishes the BGP-LU peering between PEs and ASBRs and between RR and ASBR only.No BGP-LU ...
2
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1answer
101 views

Should the Loopback address be unique across the network?

I have an MPLS network where every site has two PEs for redundancy. and I want to configure a set of loopback interfaces on every PE router for routing traffic between different VRFs. is it possible ...
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1answer
59 views

VPN MPLS L3 Routing

I have this vpn mpls l3 scenario: Let's say that the host (10.1.1.2) of customer 1 wants to communicate with host (10.1.2.2) of customer 2. My question is: how R2 knows that it has to forward ...
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2answers
80 views

Are mpls tunnels the only option for reachable L3vpn next-hop?

If I have the following L3vpn topology: CE --- PE1 ---- PE2 --- CE *PE1 and PE2 are directly connected. *PE1 and PE2 exchange VPNv4 routes. *If PE1 and PE2 were to exchange transport labels for ...
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1answer
6k views

Difference between L2 VPN and L3VPN. How EVPN used with VxLAN and MPLS?

I am new to VPN technology and trying to connect and get the bigger picture after going through lot of online documents. Here are my confusions: Differences between L2 VPN and L3 VPN. It would be ...
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0answers
31 views

(JunOs Configuration) setting eBGP for l3vpn

i'have one line configuration eBGP to peering PE routers with CE router. anyone can explain this configuration? i'm very confuse. thanks before :) set routing-instances xxxxx bgp group ebgp export ...
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1answer
63 views

Can we use VRFs for BW preservation across the MPLS network?

I have some ingress untagged voice traffic coming through the MPLS network and obviously I have some concerns about this traffic being de-prioritised should there is congestion on the MPLS backhaul. ...
3
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1answer
59 views

why two VPN in VPN MPLS L3 can have same addresses?

I cant understand one thing, in this scenario: This is an schema of a layer 3 vpn using mpls. I dont understand why devices conncted to VPNa and VPNb can have the same addresses, I mean, how can PE's ...
3
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1answer
729 views

SD-WAN vs MPLS VPN

Citing wikipedia on MPLS VPN There are three types of MPLS VPNs deployed in networks today: 1. Point-to-point (Pseudowire) 2. Layer 2 (VPLS) 3. Layer 3 (VPRN) I am confused about the difference ...
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2answers
352 views

Why VPWS service - MPLS has a two ethernet frame headers?

I am trying to understand VPWS services, and going through RFC 4448, Encapsulation Methods for Transport of Ethernet over MPLS Networks. Here is the packet capture: Why there is a need for again ...
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1answer
144 views

How to check whether there is traffic on EoMPLS L2VPN circuit?

I'm trying to check which of the virtual circuits are up, down and admin down. For example take this scenario. Here I have 6 VCs up and 4 down. I want to know what does it mean when it is down, ...
2
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1answer
342 views

Route Distinguisher and Route Target in MPLS network

I am confused with the uniqueness of Route Distinguisher and Route Target in an MPLS L3VPN network Are they unique for each VPN within separate Provider Edge (PE), meaning different PE could use the ...
2
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1answer
2k views

Can't ping between 2 CE routers even though routes exist in vrf routing table

I checked the vrf routing tables and the CE's network is present but I cannot ping it from anywhere. I will provide the PEs' configuration files and the CEs'. Any ideas? PE1 configuration file(R2) ...
2
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2answers
180 views

Are all the private IPv6 addresses nonoverlapping? If yes, is Route distinguisher required for IPv6?

I am wondering if all the private IPv6 address non overlapping. And if yes, I am wondering if RD is required for IPv6 addresses. When two customer sites of an ISP are using same overlapping private ...
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0answers
52 views

WAN connectivity down when BGP neighborship formed [closed]

This is happening in between PE router and CE router. Immediately after configured the neighbor command on CE router, connectivity to CE router lost. Telnet management of CE router has been enabled ...
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2answers
533 views

Can I Use BGP as an IGP - Multisite w Redundant Layer 3 MPLS WANs

The requirements are Hundreds of sites. Each has a router and firewall and a switch stack. Layer 3 MPLS WAN with BGP to provider VRF. BGP as an IGP? iBGP Would you distribute a public ASN across ...
3
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1answer
2k views

BGP and Inter-VRF Routing

I am having trouble routing between VRFs using BGP. In my lab there is a hub router with one spoke. I am using MP-BGP to extend VRFs between the two. I want to attach a firewall to the hub with a sub-...
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1answer
635 views

Managed MPLS CE router with BGP and OSPF

We have a scenario where a customer is having a managed L3VPN installed and would like to run OSPF internally. The issue is that the provider will not allow us to provide and manage the CE device and ...
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2answers
92 views

Does one need to personally manage MLPS VPN connection to have MPLS between building or can the ISP provide this connection for you?

There are 3 buildings (IT system) that need to be links together but the distance between them are very far apart (min between 230 - 470 km). How do one manage to provide connection between all of ...
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1answer
110 views

how to identify addresses on an ethernet frame

How can I identify the sender's address, the receiver and what type of message does the frame carry on its payload? The frame looks like this: FF FF FF FF FF FF 08 24 F5 CE D3 AC 08 06 00 01 08 00 ...
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1answer
119 views

Is MPLS a total different network then internet? [closed]

If I need to connect my two sites through a secured MPLS connection and I call a service provider to install one for me so will they connect me to a total different network cloud where they have only ...
2
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1answer
749 views

2547oDMVPN with Loopback as iBGP source interface

I've been trying to get 2547oDMVPN with 'mpls nhrp' setup in a VIRL environment and I have gotten it to work with some of the examples I've seen online, but all the examples online have had the hub as ...
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0answers
465 views

vMX L3 MPLS VPN routes not in forwarding table

I'm new to juniper technology and I'm trying to set up mpls vpn on vMX. Not sure if I'm missing something in configuration or if this is some kind of bug in vMX or if this is not supported on vMX. As ...
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2answers
2k views

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

In MPLS VPN network, which one is the first thing to do? I mean label tagging is first or VPN encapsulation is first? If you can, please explain about this case.
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1answer
1k views

L3VPN without route target?

i'm learning L3VPN by myself and route target did confused me a lot. I have a question that i can not find the answer. The question is: Does L3VPN work without route target ? I have this question ...
5
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1answer
232 views

VoIP QoS over DIA/L3VPN physical circuit

This Q. is really confirmation to what I already suspect. On a single physical interface with a carrier that uses two dot1q logical sub interfaces to handle DIA and L3VPN, I suspect any usage of DIA ...
2
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1answer
245 views

using OSPF over PE-CE Links in VPNs

area0 area0 CE1----------PE1-----------PE2-------------CE2 N1 N2 CE1,CE2 are same customer edge routers. PE1,PE2 are provider Edge routers of same ...
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1answer
1k views

Maximum number of MPLS VPNs provided by a router?

What's the maximum amount of MPLS VPNs a router can provide? Is it 2^20 = ~1 million = the maximum amount of different MPLS labels?
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0answers
659 views

MPLS L3 VPNs and F5 Route Domains

I realize the F5 community might be the right place for this question, but this concerns routing design as opposed to an ADC design. We are planning to use F5's CGNAT module for NAT'ing our campus ...
4
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1answer
485 views

EIGRP to iBGP metric calculation

Consider the following output: router#show ip bgp vpnv4 rd 300:1 5.5.5.5/26 BGP routing table entry for 300:1:5.5.5.5/26, version 538213 Paths: (2 available, best #2, no table) Advertised to ...
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2answers
2k views

Cisco VPNv4 over eMPBGP

IMPORTANT UPDATE: So I have worked out that the PE is in fact forwarding the updates to the route reflector. The issue seems to be to do with what rd I am looking at. You see part of this scenario ...
2
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2answers
709 views

Advertising the same prefix twice via BGP into an IPVPN

I have reachability to a certain /25 prefix at two different sites. These sites advertise the /25 via EBGP into a L3 IPVPN (MPLS). I am AS-path prepending one of these sites' advertisements to make it ...
9
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2answers
868 views

Label to Route mapping, Label generation scalability

In MPLS enabled routers, is a unique label generated per Destination prefix in routing Table or is it per Next-hop in the routing table if not both, how is the mapping between unique labels and ...
15
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3answers
20k views

MPLS vs Encrypted VPNs - traffic security?

Why do people say a lot of times that they have two connections between two offices - the main one being over MPLS and the backup one over VPN. Why not run a VPN over MPLS too? Is MPLS secure? Can no ...
4
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1answer
788 views

L2 vs L3VPN with DIA and WAAS

For an enterprise migrating from traditional Internet IPSec L2L VPNs for branch offices to a MPLS-based VPN, there are options for either a L2VPN or L3VPN. The L2VPN looks more attractive as you ...
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3answers
1k views

Alternatives to multiple Service Providers

I have one SP right now that serves 100 Sites and we are currently planning to migrate all the sites to a new SP. However, this will be a phased migration, so we will have some sites in the new SP ...