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3
votes
0answers
88 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 ...
2
votes
0answers
50 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 ...
15
votes
2answers
582 views

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 ...
0
votes
1answer
60 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? ...
0
votes
2answers
146 views

File-Sharing and TCP does not work over MPLS

We have established an MPLS between two locations. The DHCP helper is installed on the remote's router and we can ping devices from/to either subnet. DHCP is working properly in both locations. ...
1
vote
1answer
230 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 ...
2
votes
2answers
127 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 ...
2
votes
3answers
329 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 ...
3
votes
1answer
79 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 ...
2
votes
2answers
473 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 ...
-1
votes
1answer
40 views

How is the port a part of a packet? [closed]

Computer A is running a program that initiates a request to Computer B on Port X. Where / how is the port transmitted in the API request?
1
vote
0answers
68 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 ...
0
votes
1answer
79 views

Strange Network issue

No Internet access for all workstations Internet working for some servers, eg. DC MPLS network > Switch > workstation MPLS network > Switch > server Workstation troubleshooting - tracert google ...
0
votes
1answer
362 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 ...
1
vote
0answers
1k 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 ...
0
votes
1answer
56 views

MPLS: INBOUND vs OUTBOUND Labels

In The MPLS LSR if I have 4 INPUT ports with 4 labels label:port 11 : 1 22 : 2 33 : 3 44 : 4 and ONE output port How many labels can exit through the output port/interface? or do they get ...
2
votes
1answer
7k views

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 ...
4
votes
1answer
637 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 ...
1
vote
1answer
71 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 ...
1
vote
1answer
1k 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 ...
1
vote
1answer
437 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 | ...
2
votes
2answers
289 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?
5
votes
3answers
2k 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.
2
votes
1answer
236 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. ...
0
votes
1answer
102 views

Does inter-dependence on Optic Fibre WAN connection for MPLS VPN exists?

I have a netgear FVX538 firwall/gateway, 20mbps optic fibre link connected to WAN1, no connection on WAN2 and a link which I suppose to be a 2mbps MPLS line into a Cisco 1841 and in turn connected to ...
0
votes
2answers
4k 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 ...
1
vote
2answers
112 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 ...
1
vote
1answer
437 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 ...
1
vote
1answer
128 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 ...
2
votes
2answers
245 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.
1
vote
1answer
221 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 ...
3
votes
3answers
798 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 ...
1
vote
3answers
3k 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 ...
1
vote
2answers
957 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 ...
14
votes
2answers
3k 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 ...
1
vote
2answers
2k 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 ...
2
votes
4answers
553 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 ...
1
vote
5answers
1k views

how to calculcate MTU in L2 VPNs?

Hi 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 ...