Ping question

[Reprovoid]

Hi.I have 3 2620xm routers connected via dte/dce serial connections In a lab.One of the routers Is also connected to a 2950 switch.

The 2950 switch connects to an unmanaged tp-link switch that Is connected to a dsl modem/router.I have Internet access via the 2950 to my laptop.

I have ripv2 enabled on all the routers and It's working fine.The dsl modem, switch and connected router are on the same subnet.

  When I ping the dsl modem via the 2950 or via the router connected to the 2950 , It works 100%.If I ping the 2950 from either of the other two routers , It also works 100%.I can't ping the dsl modem however from the other two routers.I've only been studying for the ICND1 so maybe there's something I'm missing here.

Thanks for your patience !

[cadet alain]

Hi,

post topology and routing table on all routers as well as modem and note from which routers it is not working.

You surely missing some routes somewhere but most probably on the modem.

Regards.

Alain.

[Reprovoid]

All masks are /24  Switch:192.168.10.2   Dsl Modem:192.168.10.254 

Only R1 and switch can ping Dsl Modem.

All routers can ping R1 , Switch and eachother.

R1 Interfaces:                                       R2 Interfaces:                                                                                         

f0/0  192.168.10.1                                  f0/0  192.168.11.1 

s0/0 192.168.6.1                                    s0/0 192.168.7.2

R1 Routing table:                                  R2 Routing table:

C 192.168.10.0 f0/0                               R 192.168.10.0 via 192.168.7.1 s0/0

C 192.168.6.0   s0/0                              R 192.168.6.0  via  192.168.7.1 s0/0

R 192.168.7.0 via 192.168.6.2                C  192.168.7.0 s0/0

R3 Interfaces:              R3 Routing table:

f0/0  192.168.12.1        R 192.168.10.0 via 192.168.6.1 s1/1

s1/0 192.168.7.1          C 192.168.7.0 s1/0

s1/1 192.168.6.2          C 192.168.6.0 s1/1

[cadet alain · Accepted solution]

Hi,

put a static route on your modem/router for each remote subnet pointing to R1 192.168.10.1  and try your pings again.

Regards.

Alain 

[Reprovoid]

If It was a packet tracer lab I would have thought of that.Didn't even cross my mind.