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Questions tagged [pppoe]

For questions about PPPoE (Point-to-Point Protocol over Ethernet), which provides a method to connect two PPP nodes by encapsulating PPP frames inside Ethernet frames.

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Broken communication with FBF and next-table for route leaking

I have an MX960 configured as a BNG with two VRFs: one for subscriber access and another for Internet access. Some subscribers have static public IP addresses assigned by Radius, and their traffic ...
Pablo Xavier's user avatar
0 votes
1 answer
81 views

NAT configuration behind pppoe with virtual server

my CISCO 3925 router is handling pppoe, NAT, and DHCP server.. My local LAN is 192.168.1.x and it's behind that NAT. I'm trying to enable access to a DNS server that's on this LAN (192.168.1.191 tcp/...
Turgut Kalfaoglu's user avatar
0 votes
2 answers
924 views

How PPPoE uses addressing to know destination Mac address?

Case.1 We know that when router connected via point to point(PPP) protocol then ARP isn't used to know the destination Mac address. Case.2 When two router connected via PPP as well as Ethernet which ...
S. M.'s user avatar
  • 398
1 vote
1 answer
37 views

In PPTP, do encapsulated packets get further encapsulated in Ethernet frames?

I know that for PPP to travel in datalink layer 2 (ethernet) , the ppp frames need to get encapsulated in a ethernet frame , thus PPPoE. Is the same case for PPTP too?
Allan's user avatar
  • 107
-1 votes
1 answer
130 views

Why is Cisco router PPPoE client configuration so complicated? [closed]

In some routers like Ubiquiti's UniFi Security Gateway, when you want to connect to internet via PPPoE, all you have to do is go to the web GUI or controller, go to WAN settings, hit the dropdown ...
Noob_Guy's user avatar
  • 491
10 votes
3 answers
2k views

Why does PPP need an underlying protocol?

The Point-to-Point Protocol is (at least according to Wikipedia) a Datalink Layer Protocol. I know that different use cases exist for it but on examining the image below from Wikipedia one can see ...
Martin Dallinger's user avatar
0 votes
1 answer
667 views

Who initiates PPP Keepalives after PPPoE session is Established between Modem and BNG?

Hello Everyone, In case of DSL Modem , normally service providers employ PPPoE connection between Modem and BRAS (BNG). We all know that when Modem dials , it goes through PPPoE stages namely 1 ) PADI ...
Nabeel's user avatar
  • 1,120
0 votes
1 answer
390 views

IPCP removing default route when 2 available

I've been stuck on this one in my lab for a while. Any help is appreciated. Here's my CPE edge topology: https://i.sstatic.net/a1R6U.png Take the below scenario: I have 2 circuits coming in that I am ...
jaaacck's user avatar
2 votes
2 answers
5k views

PPP, Ethernet and PPPoE differences

Correct me if I'm wrong. So, Ethernet technology is being primarily used in LANs. And we use PPP in serial links. To carry IP datagram, we can use either layer 2 technology, such as Ethernet, or we ...
pedal's user avatar
  • 85
1 vote
1 answer
528 views

Configure 2 PPPoE wan trunk port

I have 2 routers from the same ISP but different public IP that works with PPPoE and I need to connect both into the same firewall (Watchguard). Both PPPoE have the same user, password and VLAN, so I ...
b4nerj3e's user avatar
2 votes
1 answer
2k views

Worst-case efficiency of PPP escaping mechanism

Will transferring over PPP data stream containing only reserved bytes 0x7E, 0xFF, 0x03 reduce bandwidth by 50% because of escaping? Then it seems to be very stupid if not say moronic. Such poor ...
Mikhail Karakulov's user avatar
2 votes
0 answers
310 views

Not able to ping Dialer1 interface

I have setup a PPPoE server and client. I can't ping any IP address connected on the ISP router. I'm stil figuering out why that doesn't work. But the most simple problem currently is: I can't ping ...
Eloy's user avatar
  • 207
4 votes
1 answer
549 views

Configuring PPPoE client/server

I have a lab where I would like to configure an PPPoE client and server. I have a ISP and a router device who are both connected to each other with the FaseEthernet0/1 interface. Client config: ...
Eloy's user avatar
  • 207
5 votes
1 answer
453 views

Is it possible to set up a DSL lab environment?

I'm trying to figure out if I can setup a DSL lab for training purposes. If I have a switch or laptop running a PPPOE server, could I go from ethernet-to-modem then connect the modem's WAN port to ...
Ken Velocity's user avatar
1 vote
1 answer
289 views

How Pppoe subscriber with static ip sends ipcp request

How a pppoe subscriber with static ip sends ipcp configure request. For dhcp the subscriber can include 0.0.0.0 in configure request of ipcp packet and obtain its ip from remote server. But in static ...
Chinnu's user avatar
  • 11
4 votes
1 answer
553 views

Dot1q tags, sub-interfaces

Please consider dot1q frames tagged 100 circulating on a LAN (VLAN 100). To go out onto the Internet, frames have to go through a PPPoE sub-interface which is configured as below: interface ...
Léa Massiot's user avatar
1 vote
1 answer
303 views

Can an Ethernet port with an SFP handle a PPP/fiber line?

AT&T put in a 150 Mbps fiber line at our business (not my home). They claim it uses the PPP protocol (I am told this is non-Ethernet), but is terminated in multi-mode fiber using 1000BASE SX (an ...
Beel's user avatar
  • 111
3 votes
0 answers
252 views

Router as PPPOE concentrator, PPPOE clients unable to get to DMZed static NAT server

I've been trying to figure out this problem, and I'm just not up to the task. I have a Cisco 2911 router as follows: Internet connection on GigabitEthernet0/1. Which has it's own static IP: A.B.C.38/...
Mike's user avatar
  • 131
1 vote
1 answer
341 views

PPPoE Session Establishment

From what I have understood till now about PPPoE protocol. The CPE (RG) is the PPPoE client which connects to the BNG and establishes a session. The session is always alive unless the CPE is ...
maverick's user avatar
2 votes
1 answer
1k views

PPPoE setup Cisco 881W

I've been trying to fix this myself but I'm afraid I can't. I've tried basically every tutorial already, but it still doesn't work. Can someone here write a tutorial on how to get PPPoE working with ...
user avatar
2 votes
1 answer
946 views

PPPOE Config not working

I have a Cisco 881-W router with Cisco IOS C880 Version 12.4(24)T5. For some reason I can't seem to get an IP on the Dialer. I'm probably doing something stupid wrong. Interface IP-...
user avatar
1 vote
1 answer
585 views

Why is L2TP based on PPP and not PPPoE?

I'm trying to grasp why L2TP is based on PPP. I thought PPP was a protocol for point-to-point situations where you don't have Ethernet. So why/how is L2TP using PPP in order to establish communication ...
rigor's user avatar
  • 89
2 votes
2 answers
5k views

What does State PADISNT mean/stand for? (in CiscoRouter# show pppoe session)

I stumbled upon this while doing Person VUE Test Prep for CCNA and I came up with a question that google wasn't that helpful for. (This is just for curiosity, so a basic answer will do, but for others ...
neoakris's user avatar
  • 287
1 vote
1 answer
651 views

Huawei AR160 IPSEC over DSL Packet Loss

we are Struggeling with some IPSEC Configuration via a DSL Line on a Huawei AR169 Router. When the Tunnel is running over an PPPoE Dialer we notice about 70% Packet Loss in the Tunnel. When the ...
Andreas Schaefer's user avatar
1 vote
1 answer
2k views

How to decipher, why the pppoe interface has disconnected?

I am using a Ubiquity Edgerouter X, which is connected to a Draytek modem. This is the log from the pppoe interface: #######@ubnt:~$ show interfaces pppoe pppoe0 log Tue Jun 13 06:26:00 IST 2017: PPP ...
noelmcg's user avatar
  • 121
1 vote
2 answers
564 views

What is PPPOE line protocol?

In serial wan connection we use PPP or HDLC line protocols,but where would we use PPPOE? What is Ethernet in this term 'PPPOE'?
Tehmas's user avatar
  • 355
1 vote
1 answer
76 views

Where the password is stored when using ppp protocol

The question might sound dumb, but you never learn if you do not ask. When using PPP as a datalink layer, it offers you authentication by using username and password. Where is the username and ...
Ahmad's user avatar
  • 11
2 votes
1 answer
2k views

Need help with PPPoE Subscriber Management on a MX80

I've been working with Subscriber Management using DHCP and a FreeRadius server and have been quite successful. Of course, once my company heard that it is possible for customers to bring their public ...
Beeelze's user avatar
  • 275
8 votes
1 answer
8k views

PPPoE vs L2TP protocols

I am trying to find differences between PPPoE and L2TP.Both are tunneling protocols. When to use what? thanks, GL
user2148707's user avatar
1 vote
2 answers
811 views

No RADIUS Accounting for Particular Server

We have a VoD server that's directly connected to Juniper MX104 BNG. Juniper MX104 is also acting as a BRAS. Right now if any user accesses that VoD server, all the incoming and outgoing traffic is ...
myst3ri0us's user avatar
8 votes
2 answers
42k views

What exactly is IPoE?

I am familiar with PPPoE but getting confused with the term IPoE. Is this same as usual ethernet with DHCP server? Does this have any auth built-in? How do I get authenticated? What can a client ...
user2148707's user avatar
0 votes
1 answer
988 views

IPCP DNS : Configure-Reject [closed]

I'm working with a VxWorks PPP server running on an embedded system. There seems to be a problem with IPCP DNS negotiation. Each time the PPP server offers a IPCP to a client, the client seems to be ...
fastforward's user avatar
0 votes
1 answer
249 views

PPP sessions on packet return?

Here is a picture of a an xDSL deployment : The BRAS is the termination for PPP sessions. The customer modem establishes a session with the BRAS, gets authenticated and can then access the ISP's ...
pHeoz's user avatar
  • 590
1 vote
3 answers
5k views

Configuring PPPoE client through OMCI on Huawei ma5608T

We've received an OLT ma5608T and an ONT hg8245H for a short period of time - we want to see if Huawei is better than Zhone. We don't have a full documentation for this OLT because we're not a partner ...
Tomasz Kasperczyk's user avatar
5 votes
1 answer
3k views

PPPoE interface doesn't use ARP

LAN border routers often use PPPoE protocol to communicate with ISPs and to access the Internet through ADSL. This link provides an example of output of ifconfig about an interface using PPPoE (page ...
BowPark's user avatar
  • 153
1 vote
1 answer
2k views

Help needed with PPPoE interface on Juniper MX104

I've been trying to configure dynamic subscriber management on MX104 and pretty much succeeded too. The problem I am facing now is, the MX is listening for and responding to PADI but as soon as it ...
myst3ri0us's user avatar
1 vote
1 answer
573 views

Cisco 7609 BRAS, mix NAT and public IP addressing for PPPoE clients

I would like to combine private and public addressing to PPPoE clients from a Cisco BRAS. Do you think is possible to do it using the same virtual template? If I define ip nat inside in the PPPoE ...
RS1983's user avatar
  • 501
18 votes
5 answers
14k views

Why use PPPoE and not use IP directly?

As far as I understand, PPPoE operates over ethernet, so for PPPoE to be usable you should already be able to send Ethernet frames to your ISP. At that point, why use PPPoE at all? Why not just run ...
André Borie's user avatar
1 vote
2 answers
599 views

Fiber Network Bandwidth Control without Radius/PPPoE (Service Provider-Limit Client Bandwidth)

I have been reading and watching some information regarding fiber networks and their deployment. One interesting point that was raised was that in a fiber network generally a DHCP server is used for ...
The Humble Rat's user avatar
2 votes
1 answer
1k views

Load balancing among multiple PPPoE servers

What are the possible and efficient ways to load-balance users among multiple PPPoE servers? I have tried with VRRP. Is there any other efficient way?
Venkat Chandiran's user avatar
2 votes
1 answer
3k views

Can I use PPPoE and DHCP simultaneously?

In terms of subscriber management, I understand there are two major approaches - DHCP and PPPoE. I know I'm being very general, so give me some rope. If using DHCP, RADIUS/AAA will authenticate the ...
Jordan Head's user avatar
  • 7,109
1 vote
1 answer
102 views

DSL upload link breaks down. Where to look and not to look?

In a small office where I set up the network, we recently started to experience WAN problems on the (V)DSL line. Specifically, up to three times per day the upload link breaks down to almost zero ...
vic's user avatar
  • 135
1 vote
2 answers
2k views

Link layer protocols used by ISP?

Newbie networking question here... Do ISPs generally use the same link layer protocols (Ethernet, ARP to relate to network layer 3, etc.) that are used on LANs? In school I learned in some detail ...
Adam Sharpe's user avatar
0 votes
1 answer
379 views

MikroTik: bisschoff load balancing problem? [closed]

I'm using bisschoff load-balancing .its really good and works fine.but it has a problem. The problem is when a adsl line don't have access to internet , it don't disable automatically and vice versa. ...
mrb's user avatar
  • 93
2 votes
2 answers
735 views

Cisco PPPoE over FA with L2TP client only (no IPSec)

This started as a question, with my connection failing to come up, but after a bit of trial and error, the configuration is working, so I've edited it into a solution. Access lists and address ...
Brett's user avatar
  • 221
0 votes
1 answer
2k views

Mikrotik API "no such command" when trying to get count-only of PPP connections [closed]

I don't know if I'm posting in the right forum. But well correct me if I am wrong. I am developing a service that counts the PPPoE users per MikroTik Device in the whole network every X minutes. I'm ...
Geiser's user avatar
  • 111
4 votes
2 answers
1k views

Issue getting Cisco 891 to connect to NTU via PPPoE

Other devices (MickoTik, Windows Laptop with builtin PPPoE client) seem able to connect to the NTU's PPPoE with no issue. Sanitized router configuration: ! ! Last configuration change at 06:55:18 ...
Aaron Tate's user avatar
10 votes
1 answer
1k views

Cisco IPv6 BNG Radius Attributes

I am trying to push out IPv6 unnumbered to an interface via radius. I am trying to do it in a similar fashion to how you would for IPv4: Cisco-AVPair += "ip:vrf-id=vrf-name", Cisco-AVPair += "ip:ip-...
Firebirdnz's user avatar
1 vote
1 answer
72 views

Link ADSL modem together [closed]

Is it possible to connect two (not more) ADSL modem together by using RJ11 in a local environment (ie: in a lab) ? +-------+ RJ45 +--------------+ RJ-11 +--------------+ RJ45 +-------+ | LAN 1 |...
0xBAADF00D's user avatar
10 votes
2 answers
17k views

Why PPTP, L2TP, PPPOE are in OSI Layer2?

PPTP, L2TP, PPPOE - these are tunneling protocols. And they are Data link Layer protocols. Why? As I understood, Layer2 protocols work only in same subnet. They don't use IP addresses and cannot be ...
Алдар's user avatar