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multilink pppoe

Hi All,

Is there any way to configure multilink pppoe?

Dreamed scenario:

Customer has two ADSL connection end up on two different ADSL modems. Both connected to the router's two ethernet port.

The ISP take over the pppoe sessions from the DSL provider through l2tp and terminate all sessions on a virtual-template interface.


Bundle two pppoe sessions together.

I have seen similar config but with pppoa or when the router had atm interface, but in my case I'm looking for solution for ethernet interface on the cpe.

Thanks in advance,


Hall of Fame Super Gold

Re: multilink pppoe


I think that unless the ISP configures MLPPP on his side (unlikely), that can't work.


Re: multilink pppoe


Fortunately I have some influence on the ISP side as well :)

How it should be configured on the ISP side?

Moreover how it can be achieved by Radius.

I believe special Radius attributes should be used to signal the router to use different virtual-template for this bundled link than the used by the "normal" users.

I think the client side is almost straightforward. The two ethernet interfaces connected to the two DSL modem should be configured with same pppoe-client dial-pool-number number and the ppp multilink should be enabled on the dialer.

A searched through the Cisco web but did not find a sample config.

Thanks in advance.


New Member

Re: multilink pppoe


We configured "ppp multilink" at the dialer-interface and bond the physical interfaces (for dsl-modems) to the Dialer-Pool (pppoe-client dial-pool-number X).

-> That works, but the problem is, it only works only ONE time (after the command "ppp multilink" was set to the Dialer-Interface).

If a bundled pppoe session is going down for any reason, the session comes never back to the mlp-bundle.

Any idea / any addtitional config necessary?

pppoe-client: 2641XM IOS:c2600-advsecurityk9-mz.124-25d.bin


interface FastEthernet0/1
description WAN-Interface to DSL-Modem

no ip address
ip accounting output-packets
load-interval 30
speed auto
pppoe enable group global
pppoe-client dial-pool-number XX
no cdp enable
interface Ethernet1/0
description WAN-Interface to DSL-Modem
ip accounting output-packets
load-interval 30
pppoe enable group global
pppoe-client dial-pool-number XX
no cdp enable

interface DialerXX
description Dialer PPPoE to DSL-Modem
bandwidth 2048
ip address negotiated
ip access-group xx in

no ip proxy-arp
ip accounting output-packets
ip mtu 1456
ip load-sharing per-packet
ip inspect INSPECT-RULE1 out
ip nat outside
ip virtual-reassembly
encapsulation ppp
ip route-cache flow
dialer pool 11
  dialer idle-timeout 300
dialer load-threshold 1 either
dialer vpdn
dialer-group 11
no cdp enable
ppp authentication pap chap callin optional
ppp chap hostname XX
ppp chap password XX

ppp pap sent-username XX password XX ppp ipcp dns request
ppp multilink
ppp timeout authentication 180