I don’t have a full lesson for this yet.OTV (Overlay Transport Virtualization) is an overlay network where we transport L2 Ethernet over an L3 network. As you research some of the benefits of L2TPv3 you learn that a Layer 2 connection can be extended across a Layer 3 network using a feature called x-connect or a “pseudo-wire “. In our topology, that’s the GigabitEthernet 0/2 interface.
As you investigate further the requirements and configuration you realize you have everything needed to make this connectivity scenario happen.

The remote router at the distant location is reachable already since it’s within your company’s routing (table) domain while the guest Internet router is L3 reachable via a management interface.For the network diagram used in this scenario see the below link:First off, here’s some quick definitions for L2TPv3 and Pseudo-wire:Create our L2TPv3 class – Used to configure the authentication as follows:Our next step is to apply this to a pseudo-wire defining our source interfaces for the L2TPv3 tunnel.We will verify our configuration from one of the routers with a couple of commands to check that the pseudo-wire tunnel is up.Tunnel id 15828 is up, remote id is 27169, 1 active sessionsnice solution. although regarding your requirements I don’t see the need to stretch your L2-Domain. That will be handy to have for reference.Thank you for presenting and explaining this interesting design solution.In the description it mentions that on the guest router 0/3/0 is connected with a short patch cable to 0/1/2 and 0/3/0 is also connected to the LAN. Like L2TP, L2TPv3 provides a pseudo-wire service, but scaled to fit carrier requirements. They are useful to all of us!Please do not be sorry, such these thing are normal and happened from time to time, also I’m happy that what I shared is useful to you.2.1a: Implement and troubleshoot switch administrationPPP Multilink Fragmentation and Interleaving (MLPPP)OSPF Network Type Point-to-Multipoint Non-BroadcastOSPF Next Hop IP Address with Different Network TypesOSPF Remote Loop-Free Alternate (LFA) Fast Reroute (FRR)CCIE Routing & Switching Written 400-101 Practice ExamWe use cookies to give you the best personal experience on our website. We see the L2 type (Ethernet), that the tunnel is up, and the number of packets that are sent/received. How can we do this…As you begin to research how you would like to approach this scenario with the points above in mind, the greatest technical challenge you see is the “across a layer 3 segment” point.While researching solutions, you remember some of the new benefits the more recent L2TPv3 can provide.
Ask Question Asked 2 years ... L2TPv3 or GRE tunnels, or by trunking and using VRF if you own all the hops in between. VXLAN vs VLAN over layer 3. Let’s start with a quick ping:Our ping from H1 to H2 is working so that’s looking good. Thanksi have an issue with DHCP is not working on Primary MPLS CKT.It works really fine on the backup MPLS our LEC is L2MPLS provider connected to L3MPLS provider. Let’s use the following topology:We have two routers, R1 and R2. We’ll configure L2TPv3 on these two routers so that H1 and H2 can reach each other.Our hosts will be in the same L2 domain so let’s configure an IP address on each so that they are on the same subnet:Now we can focus on the L2TPv3 configuration. You can also see the protocol number here (115).The show xconnect command is a bit similar to the first command. An obvious requirement is IP connectivity between each 2811 router for the “pseudo-wire” to function. When you configure the xconnect command, you’ll see that it supports some sub-commands:We don’t have to use this for our simple topology but this is where you can configure a backup pseudowire if you want.Let’s see if our L2TPv3 configuration is working or not.


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