Disable the split-horizon Option

By default, the split-horizon option with poison reverse is enabled on all RIPng interfaces.

1. On SEFOS1, enter the configuration mode for the interface and disable split-horizon.

   SEFOS 1 SEFOS# configure terminal
   SEFOS 1 SEFOS(config)# interface vlan 40
   SEFOS 1 SEFOS(config-if)# no ipv6 split-horizon 
   SEFOS 1 SEFOS(config-if)# end
   SEFOS 1 SEFOS# 

2. Review the configuration information.

   SEFOS 1 SEFOS# show ipv6 rip 
    
   RIP  port 521, multicast-group ff02::9,Maximum paths is 16
   Updates every 30 seconds; expire after 180
   Garbage Collect after  120 seconds
   Split Horizon is off;
   Interface:
   vlan50
   vlan40
   vlan30
   Redistribution:
    Connected,Routes  Redistribution is enabled.