Load balancing or Bonding on a 2620 Router

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Mar 25th, 2010
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I have a 2620 router (see details below) and a 2912 switch.

I have a T1  line currently connect to a WIC T1 DSU/CSU WAN card.  I would like to add more bandwidth to the router via ADSL.  The router has 2 WAN slots.  Can I add a WIC ADSL Card?   If so, how do I manage bandwidth --- can this router do load balancing or bonding with the T1 and ADSL circuits together?  How would I manage IPs?  I currently have Class C block of IP addresses w/ the T1.

Thanks for you help!


Cisco 2620 (MPC860) processor (revision 0x00) with 61440K/4096K bytes of memory.
Processor board ID JAD06190ET6 (942078993)
M860 processor: part number 0, mask 49
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)

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Giuseppe Larosa Thu, 03/25/2010 - 10:39
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Hello Gregg,

no forms of bonding are possible.

usual deployment scenario uses the ADSL link as a secondary link using a point-to-point GRE tunnel protected by IPSec to create a logical link to head quarters over the internet.

Some type of traffic could be diverted over the DSL link using policy based routing.

with the appropriate IOS image the WIC DSL should be supported.

Hope to help


greggsmithjr Fri, 03/26/2010 - 23:16
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When you say "the usual deployment is using the ADSL link as a secondary

link" ... do you mean as a fail-over? I'd really like to use it in parallel

with the T1. Since bonding is not possible, how about automatic load

balancing? I hate to have to setup policy based routing -- automatic would

be much preferred over hard-coded. Please advise.



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