Javier,

EIGRP will support secondary addresses. However,
neighbor relationships will NOT be formed with the
secondary addresses. 

Refer to:
http://www.cisco.com/warp/customer/103/eigrpfaq.html#Q1.3

A good white paper on EIGRP can be found at:
http://www.cisco.com/warp/customer/103/eigrp1.html

I found on the Cisco site, a way to get around not
getting any routing updates from the secondary IPs....

If an interface is configured with secondary IP
addresses, split horizon rules can affect whether or
not routing updates are sourced by these secondary
addresses. If the primary and secondary IP address
network numbers belong to the same network class,
routing updates source by the secondary address are
suppressed unless split horizon is disabled. If the
primary and secondary addresses do not belong to the
same network class, routing updates sourced by the
secondary address are not suppressed. 

So it looks like if you disable split horizon you will
send and receive the routing updates but not form
neighbor relationships.

Hope this helps.

Debbie

--- "Javier A. Herrera" 
wrote:
> Hello,
> i've got two routers sharing one common 
> network...one of this routers got a 
> secondary address defined over the 
> interface...
> is there any way to make this secondary 
> net be visible on the shared network 
> dynamically using EIGRP????
> 
> Thank you very much in advance,
> 
> 
> _________________
> Javier A. Herrera
> Centro de Proceso de Datos
> Universidad de Oviedo
> mailto:[EMAIL PROTECTED]
> _________________
[EMAIL PROTECTED]


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