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I have a Cisco 2600 that is connected to a working T1.
We also have an seperate working ADSL.
Can I use the Cisco 2600 to bond the T1 and ADSL for network redundancy?

So if either T1 or ADLS fails..the other WAN takes up the load?

captain-silver wrote:
> I have a Cisco 2600 that is connected to a working T1.
> We also have an seperate working ADSL.
> Can I use the Cisco 2600 to bond the T1 and ADSL for network redundancy?
>
> So if either T1 or ADLS fails..the other WAN takes up the load?
>

Loodbalancing would be a bonus...because failover is sufficient.

captain-silver <> wrote in news:10l3fpnbgg89t96
@corp.supernews.com:

> captain-silver wrote:
>> I have a Cisco 2600 that is connected to a working T1.
>> We also have an seperate working ADSL.
>> Can I use the Cisco 2600 to bond the T1 and ADSL for network redundancy?
>>
>> So if either T1 or ADLS fails..the other WAN takes up the load?
>>
>
> Loodbalancing would be a bonus...because failover is sufficient.
>
>

Are these connected to the internet? If so you can use floating default
routes to provide failover. You'll just add the priority to the route so
you'll have something like

ip route 1.1.1.1 255.255.255.0 10.1.1.1
ip route 1.1.1.1 255.255.255.0 10.1.1.1 250

In article <Xns956C961F5A816secretsquirrel69yaho@216.196.97.1 31>,
Secret Squirrel <> wrote:
:captain-silver <> wrote in news:10l3fpnbgg89t96
:@corp.supernews.com:
:>> I have a Cisco 2600 that is connected to a working T1.
:>> We also have an seperate working ADSL.
:>> Can I use the Cisco 2600 to bond the T1 and ADSL for network redundancy?

:Are these connected to the internet? If so you can use floating default
:routes to provide failover. You'll just add the priority to the route so
:you'll have something like

That works for outgoing connections made -after- the failover, but
doesn't work for any connection that was ongoing at the time of
the failover, and [unless your DNS records list the IPs from both
providers for all resources] doesn't work for incoming connections
unless the people know to try to try the alternate address.
--
Aleph sub {Aleph sub null} little, Aleph sub {Aleph sub one} little,
Aleph sub {Aleph sub two} little infinities...

"Secret Squirrel" <> wrote in message
news:Xns956C961F5A816secretsquirrel69yaho@216.196. 97.131...
> captain-silver <> wrote in news:10l3fpnbgg89t96
> @corp.supernews.com:
>
>> captain-silver wrote:
>>> I have a Cisco 2600 that is connected to a working T1.
>>> We also have an seperate working ADSL.
>>> Can I use the Cisco 2600 to bond the T1 and ADSL for network redundancy?
>>>
>>> So if either T1 or ADLS fails..the other WAN takes up the load?
>>>
>>
>> Loodbalancing would be a bonus...because failover is sufficient.
>>
>>
>
> Are these connected to the internet? If so you can use floating default
> routes to provide failover. You'll just add the priority to the route so
> you'll have something like
>
> ip route 1.1.1.1 255.255.255.0 10.1.1.1
> ip route 1.1.1.1 255.255.255.0 10.1.1.1 250

That's fine for the traffic, but if it NAT is also req'd, that's the fun
part.

In article <4152169d$>,
NO*SPAMpestewartREMOVE**SUCKS says...
> That's fine for the traffic, but if it NAT is also req'd, that's the fun
> part.


Easy enough to do with a route-map. You just match the ip with the
interface to see which natpool should be used.


--

hsb

"Somehow I imagined this experience would be more rewarding" Calvin
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In article <>,
Hansang Bae <> wrote:
>In article <4152169d$>,
>NO*SPAMpestewartREMOVE**SUCK S says...
>> That's fine for the traffic, but if it NAT is also req'd, that's the fun
>> part.
>
>
>Easy enough to do with a route-map. You just match the ip with the
>interface to see which natpool should be used.

Hansang, I can't believe you, of all people, fell into the trap of
expecting Cisco IOS to work logically and usefully.

The route-map is only used to assign the initial NAT. Once the NAT
is in the translation table, it will continue to be used until the
NAT is cleared, regardless of which interface is used to send the
packet (a royal pain when building redundant solutions with ADSL
and cable connections). The NAT table will probably be cleared when
the T1 fails (most IOS releases do serial interfaces correctly),
but when the time comes to go back from ADSL to the T1, nothing
is going to work except for new connections, as the attempts to
use the old translations will even reset the timeouts on them to
prevent them from disappearing.

--
Vincent C Jones, Consultant Expert advice and a helping hand
Networking Unlimited, Inc. for those who want to manage and
Tenafly, NJ Phone: 201 568-7810 control their networking destiny
http://www.networkingunlimited.com