pppoe multilink

Answered Question
Apr 17th, 2010
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Dear Experts,


I have 2 location connected with 2 Mbps Serial Interface & 100 Mbps Fastethernet Interface. I am trying to Bundle these 2 Interface.


I am trying to configure Multilink PPP with a serial Interface & FastEthernet Interface. Since PPP Multilink is not supported in Fastethernet, I thought of configuring PPPOE in Fastethernet.


I created Dialer Interface for PPPoE and trying to assign "PPP MULTILINK GROUP 1". I am getting the error message "MULTILINK INTERFACE IS NOT SUPPORTED IN DIALER INTERFACE"


Please guide me whether this approach is practically possible and if yes, what is the procedure.


Thanks in advance,


sairam

Correct Answer by Giuseppe Larosa about 7 years 2 weeks ago

Hello Sairam,

>>  Is it possible to bundle to PPPOE Links as we do on serial interface  with ppp encapsulation?


you had already asked this in an older thread in this forum

https://supportforums.cisco.com/message/3032613#3032613



The answer is negative as it was before. RFC2516 that defines PPPoE does not mention multilink (you cannot find the word multilink in the RFC)


http://www.faqs.org/rfcs/rfc2516.html


see also

https://supportforums.cisco.com/message/481373#481373


you can use CEF load balancing over two PPPoE indipendent connections



Hope to help

Giuseppe

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paolo bevilacqua Sat, 04/17/2010 - 12:36
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As the router is telling you, it is not possible to do that.



If you really want multilink, buy two routers that connects directly  to the E1 links.

Giuseppe Larosa Sat, 04/17/2010 - 13:08
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Hello Sairam,

>> with 2 Mbps Serial Interface & 100 Mbps


use the FE link as primary and the serial interface as backup.

If you really want to use the 2Mbps use specific static routes or PBR to put some traffic over it ( on both sides)

multilink PPP has been thought for links of equal speeds ( 64 Kbps B channels or serial interfaces of same speed), how could it deal with two links with 50 ratio in speed?


Hope to help

Giuseppe

snarayanaraju Sun, 04/18/2010 - 02:34
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Hi Giuslar & bevilacqua,


Thanks for your reply. Yes I too understood this limitation. Ofcourse while applying various thoughts another interesting scenario came across.


What is the way to BUNDLE TWO PPPOE LINKS TERMINATED ON THE SAME ROUTER (EG. CISCO 1841) ?. Is it possible to bundle to PPPOE Links as we do on serial interface with ppp encapsulation


regards,


Sairam

paolo bevilacqua Sun, 04/18/2010 - 04:11
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As indicated above: no.

Correct Answer
Giuseppe Larosa Sun, 04/18/2010 - 04:48
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Hello Sairam,

>>  Is it possible to bundle to PPPOE Links as we do on serial interface  with ppp encapsulation?


you had already asked this in an older thread in this forum

https://supportforums.cisco.com/message/3032613#3032613



The answer is negative as it was before. RFC2516 that defines PPPoE does not mention multilink (you cannot find the word multilink in the RFC)


http://www.faqs.org/rfcs/rfc2516.html


see also

https://supportforums.cisco.com/message/481373#481373


you can use CEF load balancing over two PPPoE indipendent connections



Hope to help

Giuseppe

snarayanaraju Mon, 04/19/2010 - 22:46
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Hi Giuslar,


Thanks for your assistance by providing the links. As you mentioned I too remember i posted the similar query before. After then again I started working on that to find any other solution.


However now I got very affirmative reply from you that it is not possible to bundle or Multilink on PPPOE.


Thanks for your valuable time


sairam

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