Will multiple WAN connections increase Total bandwidth on 2951 router

[firestormnet]

Hi All.

Is it possible to increase bandwidth througput on 2951 router if you have 3 WAN connections from different ISP, lets say 12Mbps + 24Mbps + 8Mbps, so will I get 44Mbps internet connection in total?

Also, on 887G router, if I use DSL 12Mbps broadband, can I use 3G internet connection constantly, not for backup only. And will I get the total bandwidth output as a sum of two connections?

Thanks for your answers.

[simon.dwyer · Accepted solution]

Unless you have BGP peering with the two ISP's you connect to then there is no chance sorry.

You can use them as fail over or force a particual service/ip over the second link.

A good reference that explains it is this:

http://www.nil.com/ipcorner/SmallSiteMultiHoming/

and for Policy base routing:

http://pierky.wordpress.com/2009/03/28/dual-wan-connection-on-cisco-with-policy-based-routing-pbr/

[firestormnet]

Thanks.

But for example, can we assign VLAN1 for WAN int1, VLAN2 for WAN int2, so Office1 will use only WAN1 connection for their broadband connection, and Office 2 will use only WAN2 for BB and internet.

Instead of 100 people connected to one 12Mbps BB connection, can we divide them to VLANs, and 50 people use 12Mbps BB connection 1 and other 50 people use second BB connection.

I don't need to have LAN between Offices or inside Office. All I need is to have internet connection for every user.

Cheers,

[simon.dwyer]

You sure can.

that second link will show you how to do it.

Basicly you setup two route-policies and apply them to the vlan svi.

One for each VLAN

and within the route policy you set the next hop interface which will be one of the adsl links. 

It can be as flexable as you want.  Just make sure you do the NAT properly as per the first link i put in.  You have to make sure you have a route-map per internet connection and make sure that you use the match statement.  This is explained better in the first link.

[firestormnet]

Thanks a mil.

Appreciate your help.

I'll check your links.

Cheers,

[nqtran1979]

not too sure if i'm over complicating things (i think its simpler) however:

just configure vrf-lite, and assign each pair of WAN/LAN interface to a vrf ... then just configure in each vrf what you would normally do if the 2951 had one WAN interface and one LAN interface.

no need for any PBR ... which i think needs to be avoided at all cost. PBR can be useful, but scalability wise or supportability it is not so great