Our example implements two dynamic tunnels automatically set up by the ingress label switch routers lsr and two tunnels that use explicit paths. Implementing trafficengineering the ability to control where and how traffic is routed on your network, to manage capacity, prioritize different services, and prevent congestion. Im looking for practical examples how this is done on the juniper boxes. Juniper networks certified internet associate jncia the juniper networks certified. Cisco and juniper both use somewhat confusing terms to describe the same thing.
Existing technologies like mplsovergre to encapsulate multiprotocol label switchingmpls over ip are not adequate for efficient load balancing of mpls. Ina minei is a network protocols engineer at juniper networks whose focus is mpls protocols and applications, diffservaware traffic engineering and network convergence. Jncia juniper networks certified internet associate. Introduction historically, mpls and l3vpn have been the domain of carriers. The segment routingbased fastreroute solution, tilfa, can provide perdestination sub50msec protection upon any single link, node or srlg failure regardless the topology. Hence you will peer up with your provider using a routing protocol and. Handy way to do some quick and dirty traffic engineering for a prefix. Basically, i have a l3vpn which connects 9 customer sites. Tracing the path of an mpls echo request packet to an l3vpn ip or ipv6 prefix. Top interview questions that bgpmpls candidates need to. Deploying mpls by tim fiola and jamie panagos learn something new about junos this week.
Automatic eros the ingress router can automatically create an ero for the lsp contains all strict hops for the complete path formed from information contained in the traffic engineering database ted ted is populated by information advertised by the interior gateway protocols both ospf and isis have been extended to support traffic. L3vpn working group addresses the need with the procedure explained in. The topic of this post is layer 3 vpn l3vpn or vprn as we call it in sros configuration, and i decided to kill two birds with one stone by inviting juniper vmx to our cozy sros environment. Hi all, weve been asked to make a pilot test for interoperability between 2 m20 and 2 7609sup7203bxl for mpls vpn and traffic engineering. However, the ability to enforce constrained traffic flows through a set of services is nonexistent in extranets and is limited in hubandspoke setups. Traffic engineering is putting the traffic where the bandwidth is. For pointtomultipoint traffic engineering, a tunnel services pic or vrf. Interzone routing and traffic forwarding a simple form of interzone traffic forwarding can be achieved using extranets or hubandspoke l3vpn configurations. To configure mpls layer 3 vpn functionality on a router running junos os, you must enable support on the provider edge pe router and configure the pe router to distribute routing information to other routers in the vpn, as explained in the following steps. While traffic engineering can help with planned maintenance, mpls also ensures rapid restoration of. Pervrf mplste tunnels this is a solution to route traffic from different vrfs to different mplste tunnels rather than making all vrfs traffic to go through a single mplste tunnel. Junos layer 3 vpns jl3v is an advancedlevel course. As promised, simple guides to mplsl3vpn with junos.
From the html or pdf version of the manual, copy a configuration example. Bgp communities can be used to steer a subnet along any path desired. Mpls and traffic engineering configuration scenario. The thinking being that youve got a smaller number of pnodes, and may be very interested in engineering your paths inside there, but your pes are likely connected to 1 or 2. Layer 3 vpns allow customers to leverage the service providers technical expertise to ensure efficient sitetosite routing. The risks and uncertainties that could cause junipers results to differ materially from those expressed or implied by such forwardlooking statements include, but are not limited to, junipers failure to accurately predict emerging technological trends and other factors listed in 1 junipers form 10q filed with the. Configuring link state distribution using bgp, configuring link state. Mpls vpn over ip tunnels rfc 5512 specifies a way for bgp to tell other bgp speakers about the type of encapsulation to be used and its related information. Multiprotocol label switching mpls is a routing technique in telecommunications networks that directs data from one node to the next based on short path labels rather than long network addresses, thus avoiding complex lookups in a routing table and speeding traffic flows. Afaik across major vendors only juniper has support for hierarchal lsps.
Srx220,srx650,srx240,srx210,srx110,srx100,qfx series,ex4600. She has helped to implement these and other features into the junos operating system. Difference between l2vpn and l3 vpn cisco community. Facilitate explicit routing and traffic engineering. Mpls l3vpn networks free download as powerpoint presentation. Elsp where the class of traffic is inferred from the mpls exp field, which can be itself inferred from the ip dscp field at the mpls network ingress. As we currently only use ldp we would have to introduce rsvp alongside ldp. Configuring policies for the vrf table on pe routers in vpns 98. Junos 3 usa rotte statiche cust1r1 usa rotte statiche only default, cust1r2 usa ospf vengono qui rappresentate solo le parti salienti junos1. Juniper qfx511048s rr1 session juniper mx204 cisco nexus 9300fx arista 7280sr 1 and 2. Bgp uses a new defined safi subsequent address family identifier value called encapsulation safi. We have 1 juniper mpls manual available for free pdf download.
This document provides a sample configuration for implementing traffic engineering te on top of an existing multiprotocol label switching mpls network using frame relay and open shortest path first ospf. For this lab, i didnt want a trivial setup, but still wanted to. She is active in industry forums, has presented mpls tutorials at the north american network operators group conference and is a regular. The history of traffic engineering and mpls 475 ip routing 475 atm and overlay networks 476 sonet and mpls 478. These examples carry customer pseudowires l2vpn but the same concepts would apply for l3vpn as well. Hence, you will have to run ip services with your provider. Mpls traffic engineering configuration juniper networks. The bgpmpls vpn rfc 4364 configuration will undergo the following milestones. Mpls basic traffic engineering using ospf configuration. Read the attached pdf written by sethuraman ramanathan to learn how junipers contrail cloud solution with mplsoverudp overlays is implemented.
The traffic is rerouted straight to the postconvergence path, hence avoiding any intermediate flap via an intermediate path. List the providerprovisioned mpls vpn features supported by the junos os software. Pdf interoperability and reliability of multiplatform mpls vpn. Softwaredefined networking sdn is a new architecture for computer networks, wherein control plane and data plane in network elements are separated, and control plane is implemented as an. The labels identify virtual links paths between distant nodes rather than endpoints. Previously the 8 sites, which are running mikrotik routers have bgp sessions for vpn4 inetvpn back to two mx104s which are. Mpls layer 3 vpn configuration overview juniper networks. Addressfamily vpnv4 is used to transport vrf traffic, which is quite heavier 96 bits than normal ipv4 packets, and addressfamily ipv4 is used to transport traditional 32bit ipv4 packets. Describe the flow of control traffic and data traffic in a hubandspoke layer 3. This actually allowed acme to have the ease of setting up ldp at the edges and rsvp provides traffic engineering at the core bringing the best of both worlds. Pepe relationship configuration with vpn ipv4 address family introduction pece routing configuration with both bgp. Mplsover udp tunnels are used on datacenter environment as overlays. Basic l3vpn bgpmpls vpn or vprn configuration on nokia.
Describe the flow of control traffic and data traffic in a hub andspoke layer 3 vpn. The customers customer edge ce switch uses a routing protocol such as bgp or ospf to communicate with the service providers provider edge pe switch to carry ip prefixes across the network. Cisco to juniper mpls vpns and te interoperability. Now we want one l2vpn to use a specific path trough the network and not follow the igp. These handson labs utilize juniper networks vmx series devices using the junos os release 19. Effectively implement traffic engineering and understand how to effectively and. Note that most mobile devices can also view pdf files. In this document we will explore label operations hopbyhop through three common topologies for traffic engineering tunnels. For example, if an mpls traffic engineering tunnel will be set up between r2 and r6 in figure 1, all the definitions are done at r2. Multias operations with a bgpmpls vpn capable transit provider. Provision l3vpn, vpls, and layer 2 circuits on juniper networks routers.
L3vpn routing problem jnet community juniper networks. When traffic engineering is the primary driver for the business, but utilizing equipment that supports segment routingmpls te is out of the budget, this is a workable solution to have total control of traffic paths. The tunnel destinations are called tailend or egress node. Mpls traffic engineering tunnels are unidirectional tunnels and not congruent. Tunnel destination address is also specified at the headend. She is active in industry forums, has presented mpls tutorials at the north american network operators group conference and is a. Fast restoration frr, traffic engineering, and network programmability use cases. When we deploy l3vpn, we need vpnv4 peering between the pes to take the vrf routes labeled with rd, rt to the corresponding destination pe router. Mpls topology and with an mpls vpn running endtoend. This book was originally developed by juniper networks inc. Network world a good example where qos is needed is voip traffic.
Mpls configuration guide for cisco ncs 5500 series routers. Describe the flow of control traffic and data traffic in a hubandspoke layer 3 vpn. Simplifying traffic engineering in softwaredefined. With l3vpn service you connect with your mpls provider at layer 3. Nanog 2006 differentiated services model diffserv architecture rfc 2475 scales well with large flows through aggregation creates a means for traffic conditioning tc defines perhop behavior phb edge nodes perform tc allows core routers to do more important processing tasks tough to predict endtoend behavior especially with multiple diffserv domains. Multivendor mpls l3vpn small mpls network, with p routers mikrotik, pe routers mikrotik, cisco, juniper and a. Each vpn is configured using the same vrf target parameter at all locations. More recently, ive seen many more enterprises deploying selfmanaged mpls solutions, sometimes over vanilla l2 connectivity from carriers, other times, using a carrier vpls service as an underlay within the core. Ipbased vpn customers get individual virtual routing domains. For our first example we have a pseudowire between pe2 and pe4. Accelerate your cisco learning experience with complimentary access to cisco. Hi all, i have a bit of a strange problem going on and ive been trying to find a solution for a while now.
Monitoring interfaces configured with traffic engineering bandwidth accounting. Mpls and traffic engineering, mpls traffic engineering and signaling protocols overview, traffic engineering capabilities, components of traffic engineering, packet forwarding component, offline path planning and analysis, flexible lsp calculation and configuration, linkstate distribution using bgp overview, example. From the html or pdf version of the manual, copy a configuration example into a text file. If your tunnels follow the same path, but are defined in order to provide several qos, you should look at differentiated service standards and how it integrates with mpls and traffic engineering. It is being offered in electronic format because the original book isbn. Voip traffic needs to be delivered within a certain time to the destination, or it becomes. Juniper te shortcuts cisco autoroute announce let the local router use mpls lsps as nexthops for bgpigp routes. All interfaces in figure 1 are configured in ospf area 0 and traffic engineering is enabled on ospf area 0. Routes of lsps created by rsvp are placed in a separate routing table inet. Additional benefits of mpls and traffic engineering 10.
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