Load balancing and Failover

[bhatti.imran]

we have three Lines 02 E1 and one T1 Between the same destination.

I wan to make these lines Load balance and

Failover.

I want to try routing protocol ( OSPF) with the CEF ( per destination) enabled.

I am new to These kind of solution

can any body help and guide me.

Thanks

[manoj.kv]

Hi

As per your query you can use OSPF for both your requirements.But ospf will not loadbalance unequal coast paths. SO if you wnat to load balance through all lines you have to change the cost of all paths to same.( using ip ospf cost command).The seconed case failover, what I understand is if one line goes down the packets shoud reach the destination. That part ospf will automatically take care using spf algorithm.

Hope this helps.

Regards

Manoj

[bhatti.imran]

Thanks for help

As i said before that We have 2 E1 and one T1. 2 E1 lines are on fiber where as T1 line is on satellite.2 E1 are on same router where as one T1 is on other router.

But all lines are point to point between same destinations

Now my Target is to use efficiently all lines and in case of failure of any line other line still be in operations.

i think failover part is done by the OSPF and also load balance is possible between these unequal cost of all paths using ip ospf cost command.

But It is not better to use IP CEF for load sharing.

I want to implement in the simplest way because may be later i have to add the Internet VPN line for same destinations.

[manoj.kv]

Hi,

Then you try multilink and HSRP.To configure this please refer the links below.

http://www.cisco.com/univercd/cc/td/doc/product/aggr/10000/10ksw/mlppos.htm

http://www.cisco.com/warp/public/619/7.html

Hope this helps

Manoj

[Roberto Salazar]

You might also want to consider MLP (Multilink PPP)

Multilink PPP (MLP), as defined in RFC 1990, is a variant of PPP used to aggregate multiple WAN links into one logical channel for the transport of traffic. It enables the load-balancing of traffic from different links and allows some level of redundancy in case of a line failure on a single link.

Here is a link on the tech and some configuration examples:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_configuration_guide_chapter09186a00800d9845.html#wp1002326

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