Questions tagged [mpls]

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How can I gain better insight into ISP-managed equipment (routers)?

I have a number of customers who have networking equipment managed by their ISP. This is usually in the form of an ISP-provided switch or router placed at the customer location(s). For sites that ...
ewwhite's user avatar
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14 votes
2 answers
5k views

When would you use MPLS?

After having just spent months setting up a fairly complex VPN, I'm beginning to look at alternatives for the future. Some of my network providers use MPLS to connect to us, and I suppose it works ...
Kyle's user avatar
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5 votes
3 answers
5k views

Terminating MPLS vpn on Linux

Is it possible to terminate MPLS vpn connection on Linux and how? On my side Linux box has fiber ethernet interface and has fiber plugged in. We do not have any other router etc.
seaquest's user avatar
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4 votes
1 answer
1k views

Understanding Ethernet Headers, What MTU Do I Need?

I see many articles on line stating that the overhead of Ethernet is 18 bytes (example: http://www.learnios.com/viewtopic.php?f=8&t=18887) Looking at this wiki article (http://en.wikipedia.org/...
Baldrick's user avatar
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4 votes
0 answers
2k views

TCP Window Scaling Problem over MPLS

After extensive troubleshooting why the TCP speed over an MPLS circuit is slow in one direction, I figured out that by adjusting the TCP window size the situation improved a lot. Maybe you can tell me ...
Leon Kramer's user avatar
3 votes
3 answers
2k views

Public IPs on MPLS Traceroute

When running a traceroute, should I see any public IP addresses when tracing route from one MPLS point to another MPLS point? So when I do a traceroute from 10.0.0.1 to 10.0.1.1, I see some public IP ...
Kyle Brandt's user avatar
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3 votes
2 answers
2k views

How to get a report of all mac addresses on another subnet?

We have an MPLS consisting of two branches: Location1 and Location2. I am using the Softperfect netscan to report all ip addresses and mac addresses of devices on Location1 where my workstation is ...
bgmCoder's user avatar
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3 votes
1 answer
124 views

MPLS: choice of initial label for an incoming packet

At the entry of a MPLS tunnel, which packet fields are used to determine the label of an incoming packet? Here it says that there are other attributes that are taken into account besides the IP ...
Ricky Robinson's user avatar
2 votes
2 answers
1k views

why ATM and MPLS are at level 2.5

i don't understand why ATM and MPLS are not well classified in networking levels stack iso/osi.
nkint's user avatar
  • 153
2 votes
3 answers
5k views

Can I run a single DHCP Server for all branches of an MPLS?

We have a two-location MPLS. I am told by the ISP that I can have a single DHCP server to service both branches. But I don't understand this. Consider this: Location1 (Host branch with the DHCP ...
bgmCoder's user avatar
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2 votes
2 answers
1k views

What routing protocol to use with MPLS?

My MPLS provider is giving us a choice to use static routes or BGP for our new MPLS setup. What are advantages/disadvantages of the 2 choices? What is more commonly used?
Alex's user avatar
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2 votes
1 answer
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What is MPLS Layer 2 VPN and how is it different from MPLS layer 3 VPN?

There is quite an amount of buzz in the telecommunications industry about MPLS. I am able to understand how an MPLS works over an IP network (MPLS L3). But, what is an MPLS layer 2 network and how is ...
Hashken's user avatar
  • 147
2 votes
1 answer
757 views

Using openvswitch with mpls and tcp

I'm doing R&D in SDN. In this case scenario, we use MPLS labeling, and Open vSwitch as software-switches. We are using 2 server nodes with ovs 2.6.0, with kernel modules loaded, and 2 hosts. ...
Juan L. Cruz's user avatar
2 votes
1 answer
1k views

Site of origin with MPLS

I'm learning about MPLS. I have two sites in my scenario using eBGP for PE-CE communication, and both using the same ASN (deliberately as I want to know about SOO) and I cannot advertise a route from ...
davedavedave's user avatar
2 votes
2 answers
1k views

Internal Site to Site VPN over MPLS speed issues?

How do I troubleshoot slow performance of a site to site VPN tunnel over a MPLS circuit? What are the relevant reports/stats I should be looking at? Background: I support one end of a Site to Site ...
Randy K's user avatar
  • 75
2 votes
4 answers
626 views

Web Content Filtering Recommendations [closed]

We have a corporate MPLS network hosted by a large ISP. Each site has it's own dedicated path to the Internet, so there is no single point of Internet access to place a filtering appliance. We've ...
Russ Warren's user avatar
  • 1,304
2 votes
0 answers
426 views

Non-local IP for next hop in routing

I'm working with an MPLS network and I am slightly confused about some route entries. Interfaces are (these are fake IPs): eth0 10.10.10.1/24 (LAN) eth1 10.9.9.1/24 (MPLS) eht2 2.2.2.2/24 ...
Eric's user avatar
  • 21
2 votes
0 answers
7k views

External AD Trust randomly fails

We have a one way external trust between two domains. The trust was configured and validated both ways everything worked fine. Randomly the trust will stop functioning. If we reboot one of the ...
floyd's user avatar
  • 1,530
2 votes
1 answer
341 views

Configuring Cisco Router 2851 to handle MPLS traffic tunnelling

Some guy configured a Cat 6500 Core Switch on my net to handle MPLS traffic (and it works). The MPLS line is also directly connected to the internet, so our edges and firewalls are bypassed actually. ...
Parsa's user avatar
  • 641
1 vote
3 answers
8k views

Slow Performance with MPLS

Background: My company is switching to an MPLS provider. The MPLS provider is providing both internet and MPLS. This is done with one ethernet drop by using two dot1q sub interfaces, one for the ...
Kyle Brandt's user avatar
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1 vote
5 answers
2k views

how to calculcate MTU in L2 VPNs?

How does mtu calculation work with L2 VPNs? Sample topology is: CE---PE---MPLS---PE---CE Where and how would you implement MTU calculcation? What will decide how much MTU should be? I have ...
user avatar
1 vote
2 answers
160 views

Public addressing inside MPLS

Question on MPLS connectivity to a new Cloud Voice Offering: My cloud service is deployed in a service provider data center, and I can obtain an MPLS connection from them, as well as a direct ...
Steve Carr's user avatar
1 vote
2 answers
3k views

Network Balancing / Failover with MPLS and IPSEC Tunnels

I currently manage several office locations which each have two internet connections, a DSL line and some bonded T1 lines. Currently, the DSL line is used for the internet and the bonded T1 lines are ...
Kyle Brandt's user avatar
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1 vote
1 answer
149 views

About MPLS label range

In most routers or switches that support MPLS, if transit label and uhp LSP label need to have a different label range? when protocol(LDP or BGP) assign labels, I know that VPN label and LSP tunnel ...
FLYFLY's user avatar
  • 11
1 vote
1 answer
2k views

How to configure linux DHCP servier for MPLS?

We are set up with a two-branch MPLS with a DCHP Helper on the Remote subnet. The DHCP service is running on a CentOS box. So I have two subnets: HostRange: 192.168.0.1 - 192.168.1.254 RemoteRange: ...
bgmCoder's user avatar
  • 726
1 vote
1 answer
841 views

Problems with RD, RT import and RT export in MPLS VPN and BGP

I'm learning MPLS VPN with MP-BGP and I'm finding difficulties with undertstanding the RD value and the RT import and export values. From what I've already understand, RD (route distinguisher) ...
wasanga7's user avatar
  • 113
1 vote
1 answer
1k views

Connecting MPLS Link to Local Network

First off, I'm a vlan-virgin. We have two offices (OfficeA & OfficeB) and we have two core switches (Cisco 45XXs) in each office (OfficeA-CSW & OfficeB-CSW). In OfficeB we also have a ...
Georgette Taala's user avatar
1 vote
1 answer
560 views

How to use same MPLS Traffic Engineering tunnel for ipv4 and ipv6

I have MPLS TE configured and working, but it is currently using IPV4 and I needed to include IPV6. My current tunnel configuration is the following: interface Tunnel1 ip unnumbered Loopback0 ipv6 ...
João Rodrigues's user avatar
1 vote
1 answer
751 views

same label along MPLS label switched path, is it possible?

I am a true beginner as far as MPLS is concerned and I was wondering if this would be possible; To be more specific assume a LSP (Label Switched Path) from Host A -> Router 1-> Router 2 ->...
user113478's user avatar
1 vote
1 answer
5k views

Route IP from one vlan to another vlan in the same vrf of the same router

Can you route a IP (/32) from one vlan to another vlan in the same vrf of the same router ? Exemple: example_router#show version Cisco IOS Software, c7600s72033_rp Software (c7600s72033_rp-...
Radu Maris's user avatar
1 vote
1 answer
969 views

Unequal Cost Load Balancing via MPLS TE

Given the following network, with all sites' network routing tables built via OSPF: Site_A | Site_A_router | \ | Intermediate_site_C_router -- Other_sites | ...
Oesor's user avatar
  • 310
1 vote
1 answer
250 views

Providing internet access to users in an Enterprise (MPLS ) Network

Scenario I'm planning to setup a typical Head Office - Branch Office(s) Network Setup. there will be 25 branch offices in India of two will be overseas (one in US and the other in UK). All these ...
Vivek Bernard's user avatar
1 vote
1 answer
282 views

Choosing protocol/method of connecting branch offices or datacentres

I have experience of openvpn, ciscos ipsec tunnels and alike but I wonder in what situation one would benefit from using a MPLS instead? If I understand it correctly, MPLS is L2 (but is sometimes ...
3molo's user avatar
  • 4,350
1 vote
2 answers
1k views

WAN Link Speed and TCP Window Sizes on Windows 2003 / XP

I currently have a data center connected to two remote locations via MPLS - 2M and 6M respectively. The 2M connection (to Asia from the US) has about 300ms of latency and when transferring between ...
Dustin's user avatar
  • 43
1 vote
0 answers
54 views

How to allow workstations to use static routes from windows server

I have an MPLS network with 5 connected offices. All of the workstations can login to the domain controller at the main office. The DC at the main office can see all of the workstations at all of the ...
kw1162's user avatar
  • 11
1 vote
2 answers
1k views

Slow file transfer in one direction over MPLS

We are having an issue with file transfers over our MPLS. Our setup: Home Office <====== MPLS ======> Datacenter VM Cluster VM Cluster Windows 2008 ...
wbg34's user avatar
  • 11
1 vote
2 answers
2k views

Can't manage / ping Sonicwall's LAN interface from across MPLS

We have two of our sites connected via an MPLS that bypasses our firewall. Traffic between the sites, when hitting our core switch is routed directly to a second interface on our ISP's router. The ...
Geoff's user avatar
  • 57
1 vote
0 answers
149 views

Flat ISP network to MPLS dumb Q

I have a fairly flat ISP network that I am upgrading to use MPLS (dont ask why, that decision is above my position) but clients/CPE are authenticated using PPPoE. Each POP uses a router configured as ...
Random-IT's user avatar
  • 181
1 vote
0 answers
1k views

Routing Issue - can't ping gateway from other routers in full mesh

I am setting up a new network. I have 4 routers in a full mesh. Edge1, Edge2, Client1, Client2. This are Mikrotik Cloud Core Routers (not that it matters). They are set up with OSPF (distributing ...
Dennett Ingram's user avatar
1 vote
0 answers
297 views

MPLS label prefixes

This might sound crazy and unholy but is it possible to have MPLS prefixes like IP prefixes. MPLS label like an IP address is just a number (20 vs 32bits). There is no reason we can't have a MPLS ...
Bruce's user avatar
  • 523
0 votes
1 answer
374 views

RSTP over tunnel?

tl;dr: Is it possible to run RSTP over l2tp or MPLS? We have leased one gig capacity from a service provider's network, over which we sent a udp multicast traffic. The provider gives us drop at our ...
Raj's user avatar
  • 213
0 votes
2 answers
394 views

Organizational Access To Google Apps From China

I was tasked in deploying Google Apps for business and I have multiple offices in China which has to be on it. Anyone knows how can I bypass china's deep packet inspection? Given my company's ...
Guang Ming Chng's user avatar
0 votes
1 answer
218 views

Route-Distinguisher (RD) to import and export the prefixes?

Why can't we use Route Distinguisher(RD) as a tag to import and export the prefixes/routes. It is also a unique value per customer, why use the second parameter?
Not-a-Coder's user avatar
0 votes
1 answer
201 views

Notation used in Router configuration diagrams

I was listening to an MPLS tutorial on youtube.MPLS tutorial I came across this diagram. I am not that familiar with router configuration.My questions are as follows. 1) what does G1/0, G2/0, G3/0 ...
liv2hak's user avatar
  • 303
0 votes
1 answer
212 views

Can Windows Populate Network List in an MPLS?

With an MPLS of one host and one remote, when I go to Windows Explorer and bring up "Network", is the list supposed to be populated with the devices on both subnets? If not, can it be made to do so? ...
bgmCoder's user avatar
  • 726
0 votes
1 answer
734 views

enabling MPLS,RSVP and OSPF-TE

I am using Juniper J-series routers to emulate a small telco and VPN customer.I need to use OSPF so that the routing information can be propagated to all P and PE nodes (basically all core and edge ...
liv2hak's user avatar
  • 303
0 votes
2 answers
13k views

Do MPLS service providers peer with each other over an NNI?

Do MPLS service providers peer with each other over an NNI? Probably this doesn't make much sense for IPVPNs because it would imply that the service providers would have to share the customers ...
Steve Carr's user avatar
0 votes
0 answers
70 views

MPLS Implementation OpenFlow Iperf Testing

I have a mininet topology that consists of two hosts and two ovs switches. h1-eth0 is connected to s1-eth1 and h2-eth0 is connected to s2-eth2 and s1-eth2 and s2-eth1 is also connected. h1 is for ...
Sertan Pekel's user avatar
0 votes
1 answer
786 views

How to use MPLS VPN connection between branch offices, to connect LAN hosts that exist at different office branches?

Our ISP has provided us with a MPLS VPN connection to enable us communicate our other 3 branch offices with our head office. They provided us with WAN addresses for each dedicated router at our ...
Nati yay's user avatar
0 votes
1 answer
330 views

GCP network setup

I am currently looking at GCP to use as an addition within our existing infrastructure. I am looking at trying to set up a vrf so I can keep this traffic isolated from my current setup, I can't find ...
A.Doe's user avatar
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