🚀 go-pugleaf

   According to my experience, secondary addresses on cisco routers work 
   only if the other nodes are not aware of the subnetting (so that they 
   still think it is one big network), but even in this case, proxy-arp 
   would be more appropriate.

   However, if You are using (for the sake of example) two class-C networks
   on the same Ethernet (or a class-B and class-C network), they are not 
   announced to each other.

	   +---------+
	   | Cisco   |  primary   : 192.1.1.20
	   +---------+  secondary : 192.1.2.20
		!
   ===============================================
	!                                 !     
   +---------+                       +---------+
   | Node A  |  192.1.1.10           | Node B  | 192.1.2.15
   +---------+                       +---------+

   In this example, Cisco would not announce network 192.1.1.0 to node B
   unless split-horizon is disabled (and that only works in 9.0-only
   environment). 

"no ip split-horizon" was introduced in 8.3(3).  If you do not depend
on your hosts snooping on RIP, then you wont need this.

   I hope there is a better way around this problem, as I am afraid I
   will encounter it in a near future. Any other solutions out there ?

A better solution is to run GDP on your nodes.

Tony