Pppoe Connection

PPPoE is commonly used by internet service providers (ISPs) to deliver internet access services to their customers, typically over broadband connections. PPPoE is implemented extensively by providers offering digital subscriber line (DSL) services. Providers that use PPPoE can connect multiple hosts on a single Ethernet local area network to a remote site via a common device such as a cable or DSL modem. The protocol can also support wireless connections to the internet.

Like Ethernet and PPP, PPPoE operates at the network access layer in the Transmission Control Protocol/Internet Protocol (TCP/IP) and at the data link layer in the Open Systems Interconnection (OSI) model. The protocol is intended for use with remote access broadband technologies that offer a bridged Ethernet topology. With PPPoE, service providers can take advantage of Ethernet's cost-effective benefits and still maintain the session abstraction, access control and billing functionality available to PPP.

Pppoe Connection

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PPPoE communications are carried out in two stages: PPPoE discovery and PPP session. During the PPPoE discovery stage, the client system establishes a communication channel with an access concentrator (AC) -- a PPPoE server that negotiates and authenticates the connections with PPPoE clients. For example, a service provider might maintain multiple ACs for delivering internet access services to its customers.

After the discovery stage is complete and the connection has been established, the client and AC move on to the PPP session stage. During the session stage, point-to-point communications between the client and AC are carried out just like any PPP encapsulation. The Ethernet packets themselves are sent unicast.

Some ISPs supply their customers with broadband modems that have the PPPoE connections already configured. In some cases, however, administrators might need to set up the connection manually. For this, they will need to know the PPPoE username, password and maximum transmission unit (MTU) size. The ISP should provide the customer with the username and password, but administrators are responsible for the MTU sizing.

There might also be times when users need to configure PPPoE connections directly from their computers, such as when a bridging modem is set up for passthrough PPPoE connectivity. In this case, users must manually configure the PPPoE connections.

Fortunately, major operating systems, such as macOS, Linux and Windows, include native PPPoE support, so setting up the connection is fairly straightforward. However, users will need the PPPoE account information -- service name, username and password -- which is typically provided by the ISP. Once they set up their connections, they should not need to bother with it again, unless they upgrade their systems or perform other operations that impact the connection.

I updated a TZ 370 with 7.0.1-5051 yesterday. My secondary DSL connection has refused to connect since. No issues with it prior to this. And now just a few minutes ago, the device seems to have crashed and rebooted. So far, this release seems pretty flaky. Thinking about reverting for now to 7.0.1-5030, but how bad was the vulnerability that was found in that version?

Please take SSH access of the device and Login to console and execute the command system diagnostics show syslog

Save the PPPoE interface configuration and check the output command for PPPoE and share the output.

You may also execute the command show pppoe connection status

The web GUI only shows the PPPOE WAN connection MTU value of 1500, and this is the physical interface. The command-line interface (CLI) shows the physical interface and the logical interface. The physical interface for the WAN connection in the CLI has an MTU value of 1500. The logical interface displays an MTU of 1492 and is always deducted by eight due to the PPPOE overhead.

The only way to drop the MTU for a PPPOE connection is through the web GUI. For example, if the physical interface is 1500 and an MTU of 1484 is required by the PPPOE connection, drop the physical interface to 1492.

My connection is via PPPoE, but I can't connect to the internet, could anyone help me set up?

I do not know why but when I used the original firmware, to configure the network I had to put username and password and Mac Adress, only then I could connect to the internet. I don't know how to configure in Openwrt.

Go to the Webgui (LuCI) login and go to Network->Interface. Then add a new Interface on pressing the button. Then select the Protocol pppoe and add your credential. After saving and everything is correct you should push the connect button and then everything should work as expected.

I have done some tests from the laptop plugging into the 130 then creating a new PPPOE connection and using the DSL user/pwd and managed to dial the connection, get an external IP and browse the internet so i know the issue is not to do with VLAN tags on the port or an issue with the username/pwd.

It almost seems like an issue with the pppoe client on the device itself, i can dial through the modem with the same username and password on the laptop no problem, also connecting a draytek router on the line with the same pppoe user/password it works fine too.

Meraki support did a packet trace and their response was that the device was sending PADI pppoe frames but not receiving any PADO responses back, but it just doesn't make sense that i can connect other devices to the same connection and dial through without an issue, yet the Meraki does not connect.

Ive tried the config on both WAN1 and WAN2 with the same result. I've done some more testing today and I can use exactly the same hardware Draytek 130/mx84 on a different provider VDSL connection (Zen) but the combination of MX & provider Vodafone does not seem to work.

So to me it seems like something directly related to the Vodafone provider and MX, the only thing that's obvious to me is that in the pppoe username for vodafone there is a hyphen and I'm not sure is this is causing some issue with the MX or not. I won't lie but the support from Meraki on this has been poor and at the moment I've got a 3k door stop.

I have been trying to set up a PPPoE connection for several days. Unfortunately, the connection is not established despite all the correct settings. I enter login and password, set VDSL for my internet operator, set MTU according to his suggestions (1492). I also tried the MTU 1500 setting.

In the logs, I get information about the need to check the login and password. These data are correct, the internet works on a different router.

My configuration is: an optical fiber connected to the ONT that processes the connection to ethernet. Then I connect to the ONT to my router, where it configures PPPoE. I would like to disconnect the current router (because it does not have the bridge mode) and connect Sophos XG in its place, which would connect directly to the Internet.

PPPoE should be able to work without having to activate your appliance first. If you would like to test, you can always plug it to another connection first to activate, then test your PPPoE connection again.

The Point-to-Point Protocol over Ethernet (PPPoE) is a network protocol for encapsulating Point-to-Point Protocol (PPP) frames inside Ethernet frames. It appeared in 1999, in the context of the boom of DSL as the solution for tunneling packets over the DSL connection to the ISP's IP network, and from there to the rest of the Internet. A 2005 networking book noted that "Most DSL providers use PPPoE, which provides authentication, encryption, and compression."[1] Typical use of PPPoE involves leveraging the PPP facilities for authenticating the user with a username and password, predominately via the PAP protocol and less often via CHAP.[2] Around 2000, PPPoE was also starting to become a replacement method for talking to a modem connected to a computer or router over an Ethernet LAN displacing the older method, which had been USB. This use-case, connecting routers to modems over Ethernet is still extremely common today.

These requirements didn't lend themselves to the connection establishment lag of a dial-up process nor its one-computer-to-one-ISP model, nor even the many-to-one that NAT plus dial-up provided. A new model was required.

PPPoE was initially designed to provide a small LAN with individual independent connections to the Internet at large, but also such that the protocol itself would be lightweight enough that it wouldn't impinge on the hoped-for home usage market when it finally arrived. While success on the second matter may be debated (some complain that 8 bytes per packet is too much) PPPoE clearly succeeded in bringing sufficient volume to drive the price for service down to what a home user would pay.

Since traditional PPP connections are established between two end points over a serial link or over an ATM virtual circuit that has already been established during dial-up, all PPP frames sent on the wire are sure to reach the other end. But Ethernet networks are multi-access where each node in the network can access every other node. An Ethernet frame contains the hardware address of the destination node (MAC address). This helps the frame reach the intended destination.

Hence before exchanging PPP control packets to establish the connection over Ethernet, the MAC addresses of the two end points should be known to each other so that they can be encoded in these control packets. The PPPoE Discovery stage does exactly this. It also helps establish a Session ID that can be used for further exchange of packets. 2351a5e196