Combining bandwidths on a router

Answered Question

The local ISP provides cheaper WAn links in the form of ADSL links, the cost of which is usually 1/3 of the leased MPLS based links.


Both of these terminate on the ethernet interfaces of a router.


I was wondering, if I can combine 3-4 ADSL links of about 4MB each to give me a total of 16Mb capacity for diverting my internal HTTP/SMTP traffic only, what kind of router setup should I be looking at?


How can my design cater to at least load balance the outgoing traffic across all 4 ADSL links while maintaining the incoming connections across the route?


Is there an extra equipment that needs to deployed apart from a router (2811 probably) with an extra HWIC of 4 FE ports?

Correct Answer by guruprasadr about 9 years 1 month ago

HI Fahim, [Pls RATE if HELPS]


Please find the attachment having the details of Configuring Multilink P - to - P Method and its limitations for your reference.


If your LINK are Internet - Type, also from the Same Provider (ISP), request them to Bundle the LINK's at their side also.


Hope I am Informative.


Pls RATE if HELPS => Use the RATING System


Best Regards,


Guru Prasad R



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guruprasadr Thu, 05/22/2008 - 10:03
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HI Fahim, [Pls Rate if HELPS]


The hardware is enough to support your requirement.


You can go for a "MULTILINK" concept. With Multilink the links are bundled and the traffic is carried over it.


This is a per-packet or per-destination load balancing. But in a Multilink the actual traffic is equally loaded on all the links that are bundled in the MLPPP.


Hope I am informative.


Pls RATE if HELPS


Best Regards,


Guru Prasad R

Thanks Prasad, would take a look at this concept in detail, although a quick search for Multilink on Cisco site yielded Multilink results for all sorts of configuration and link classes. Can you pls help me identify the pertinant link?


So, using multilink, I effectively do away with using / enabling GLBP or HSRP/VRRP over any of my interfaces?


and, does enabling multilink on my router, requires me to involve the ISP side in any way?


Correct Answer
guruprasadr Thu, 05/22/2008 - 10:45
User Badges:
  • Gold, 750 points or more

HI Fahim, [Pls RATE if HELPS]


Please find the attachment having the details of Configuring Multilink P - to - P Method and its limitations for your reference.


If your LINK are Internet - Type, also from the Same Provider (ISP), request them to Bundle the LINK's at their side also.


Hope I am Informative.


Pls RATE if HELPS => Use the RATING System


Best Regards,


Guru Prasad R



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