RIP V2 PROBLEM

[mariosomo9]

hello everyone.i have a rip v2 connection issue as i can identify ,i have 1 router  in main town and 3 routers in other towns .every router is connected to a switch and the switch to devices . i also have intervlan for vlans to communicate between towns . i did the rip v2 for network 10.0.0.0 , the problem is  that the packets send from the main routers devices only reach the router town interfaces but they cant go inside the other town networks ,i tried evrything and i think there is a rip v2 problem with routers. for example the pc 22f can reach only router lemesos fa0/0 . and the pc  on the left side(u cantseeit) casn ping routerlemesos 0/0 router paphos 0/0 and larnaca0/0 but they cant join the local towns network , please help

[liviu.gheorghe]

because you configured a /26 network mask, and yes you configured it on more than one router interface.

[mariosomo9]

so how i fix this remove all intervlans and add the first as 10.1.5.0/24??

[mariosomo9]

so if i do this is there a chance that rip will work instead of statics? i will make ad of routers 130 rip is 120 so irp will route first

[liviu.gheorghe]

No, you have to change the IP addressing plan in my opinion.

[mariosomo9]

how everything has to be as it is

[liviu.gheorghe · Accepted solution]

If you keep the actual addressing schema. where VLAN 50 connected to router LEMESOS has the same configured subnet 10.1.5.0/26, the hosts connected to router LEMESOS will not be able to comunicate to the hosts in the same subnet 10.1.5.0/26 connected to router PAPHOS.

This is how IP communication works - if PC21F which has an IP of 10.1.5.22/26 wants to communicate with PC31F which has an IP of 10.1.5.32/26, sees from the IP address and mask combination that PC31F is on the same subnet as PC21F, so he broadcasts an ARP request to find out the MAC address of PC31F.

PC21F and PC31F are separated broadcast domains by the routers LEMESOS and PAPHOS, so the broadcast from PC21F will never reach PC31F, because the routers do not forward broadcasts, and PC21F will never find PC31F MAC address in order to communicate.

This is why VLAN50 attached to router LEMESOS should have an IP subnet different from VLAN50 attached to router PAPHOS and VLAN50 attached to FAMACA. For example you could have the same addresing schema for VLAN50:

Router main: 10.1.5.0/26

Router LEMESOS: 10.1.15.0/26

Router PAPHOS: 10.1.25.0/26

Router FAMACA: 10.1.45.0/26

This way the PC in VLAN50 attached to router LEMESOS belong to the same subnet 10.1.15.0/26 and can communicate with each other using the method I described earlier.

If PC21F wants to communicate with PC31F now, which has an IP of 10.1.15.32/26, sees from the IP address and mask combination that PC31F is on a different subnet as PC21F, sends an ARP request for the MAC address of PC31F and the router LEMESOS who has routing information of network 10.1.15.0/26 responds with his own MAC address and then PC21F sends the packet to the router which will deliver it to router PAPHOS and then to PC31F.

[mariosomo9]

thanks for your time a lot my friend.so there is no other way to make this network work without changing the vlsm and vlans

[liviu.gheorghe]

Unfortunately no. The VLANs as they are defined in the switches can stay the same without a problem, but the subnets assigned to them on different routers must be changed like I explained earlyer in order to have connectivity between routers and use a dynamic routing protocol.

HTH

[mariosomo9]

most of the ips are static but i will have problem with both statics and dhcp . i should have done vlsm for 20 students nicosia 10 in each town diferent subnet.4 printers in nicosia and 1 printer to each town different subnet according to the vlsm ...and the others just like this 2 i said

[mariosomo9]

i will remove all routers and connect every switch to the main