1841 router with Dual-WAN load-balancing

[firestormnet]

Hi All.

We've got a 1841 router with dual-WAN connection, one is Cable and it goes to Fa0/0, another one is ADSL2+ and it goes to WIC-ADSL card.

I'm trying to configure a load-balancing and failover using per-packet or per-destination connection.

I can configure "ip sla" for both connections pinging 2 different DNS IPs of 2 ISPs.

But I can't configure command "track 1 rtr 1 reachability" and "track 2 rtr 2 reachability". There is no "rtr" allowed to type there. And all examples shows that command for load-balancing.

Does anybody know what command to use for that or why I cannot use the above command?

Thanks in advance.

Regards

[Alex Deiwor]

As I know, that's not directly possible, because the ADSL WAN is a back-up from the main line.

Anyway, if you want to split the destination, may be you can use metrics to make a manual balance (thru ip route commands).

Cheers!

[firestormnet]

Hi Alex.

Thanks for your reply.

At the moment I'm using this config:

track 1 interface FastEthernet0/0 ip routing

ip route 0.0.0.0 0.0.0.0 188.1.2.3 track 1

ip route 0.0.0.0 0.0.0.0 Dialer0 10

As you can see all traffic goes to Fa0/0 port and Dialer0 is used as backup, right?

When I remove a distance 10 then Dialer0 becomes  static default route and all traffic goes to it, but I prefer to use Fa0/0 or both of them.

So I'm not sure how to setup them equal and how to test that.

Cheers,

[cadet alain]

Hi,

track 1 ip sla 1

ip route 0.0.0.0 0.0.0.0 x.x.x.x track 1 

ip route 0.0.0.0 0.0.0.0 x.x.x.x 

By default load-sharing is done by CEF so it is per src-dst IP pair.

in IP sla configure source-interface so ping tests will always be sourced via primary path.

Regards.

Alain

Don't forget to rate helpful posts.

[firestormnet]

Thanks to everybody for your replies.

I've been looking after that connection for last few weeks and I don't really like how it works.

If I put "ip routes" equal then ATM interface (ADSL) is loaded more then Fa0/0 interface (Cabel) and as we monitor both interfaces using SNMP monitoring the cabel connection after a while start showhing drops (it maybe a packet lost). And customer complaints about speed.

Then I add administrative distance to ADSL connection to 2, and speed is better but there is no load-balancing, right?

Is it possible to setup as 1st interface for 70% of traffic and 2nd for 30%. Or the only way is to assign a specific traffic going through specific interface.

Couldn't find any docs explaining that.

Thanks in advance.

[Abzal]

Hi,

Have a look on these links

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a0080950834.shtml

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a00808d2b72.shtml

and this one very useful for your situation

https://puck.nether.net/pipermail/cisco-nsp/2011-July/079665.html

https://supportforums.cisco.com/docs/DOC-8313

please rate helpful posts.

Message was edited by: Abzal Sembay

[firestormnet]

Hi.

Yes, I was checking those articles before, but some commands don't exist in router

"track 123 rtr 1 reachability"

The config I use is the same as in first article, but my ADSL connection is loaded more (reliability 255/255, txload 1/255, rxload 226/255) then Cable connection (reliability 255/255, txload 1/255, rxload 13/255), but I prefer otherwise, as cable connection is faster.

And other articles are build on:

track 10 rtr 1 reachability

delay down 1 up 1

Which I can't use.

Cheers,

[Abzal · Accepted solution]

I suppose you are running on 1841 IPbase image. It seems does not support IP SLA.

http://www.cisco.com/en/US/prod/collateral/routers/ps5853/prod_bulletin0900aecd802edc81.html

Please rate helpful posts.

[firestormnet]

Yes, it's:

Cisco IOS Software, 1841 Software (C1841-IPBASE-M), Version 12.4(15)T7, RELEASE SOFTWARE (fc3)

Can I just upgrade a software or I need to buy a new feature license then?

Regards,

[Abzal · Accepted solution]

If you have valid service contract with Cisco you can download it from cisco.com.

Otherwise you need to buy a new license if I'm not wrong.

Contact with Cisco partner.

Software upgrade procedure

http://www.cisco.com/en/US/products/ps5855/products_tech_note09186a00801fc986.shtml