Pinging issue, may be my ip route problem.

[IsaacNP]

I have a topology of PCs A, B, D, and E, 2 routers R1 and R2, and 4 switches A, B, D, and E for each of my PCs respectively.

PC A IP is 201.4.100.1/28 with a default gateway of 201.4.100.2,

PC-B IP is 201.4.100.17/29 with a default gateway of 201.4.100.18,

PC-D IP is 201.4.100.33/27 with a default gateway of 201.4.100.34,

PC-E IP is 201.4.100.65/29 with a default gateway of 201.4.100.66.




R1 **LAN g0/0** ip is 201.4.100.14/28, **LAN g0/1** ip is 201.4.100.22/29 and **WAN s0/0/0** ip is 201.4.100.25/30.

R2 **LAN g0/0** is 201.4.100.62/27, **LAN g0/1** ip is 201.4.100.70/29, **WAN s0/0/0** ip is 201.4.100.26/30.




They are subnets A B C D E subnet numbers 0, 1, 2, 4, and 6 respectively.

Subnet addresses 201.4.100.0/28 (**A**), 201.4.100.16/29 (**B**), 201.4.100.24/30 (**C**), 201.4.100.32/27 (**D**), 201.4.100.64/29 (**E**) respectively.




The network address number is 201.4.100.0/24.




Switches A, B, D, and E have Vlan1 IPs of

201.4.100.3/28 and default gateway 201.4.100.2(**A**),

201.4.100.19/29 and default gateway 201.4.100.18(**B**),

201.4.100.35/27 and default gateway 201.4.100.34(**D**),

201.4.100.67/29 and default gateway 201.4.100.66(**E**).

My problem is that my PCs are only able to ping their respective switches and the rest fails to ping successfully like

default gateway

routers, and pcs. On the other hand, R1 and R2 can ping each other successfully, and R1 can ping Switches and PCs A and B but not D and E, as well as all the

default gateways

R2 can ping Switches and PCs D and E but not A and B, as well as all the

default gateways

I need to be able to ping PC-B to PC-A, PC-E to PC-D, and PC-A to D.

And also R1 and R2 are connected by a Serial DCE clock rate of 128000 to DTE

Subnets A, B, C, D, and E are to have 10, 6, 2, 26, and 5 usable IP addresses respectively. And also therefore a mask of /28, /29, /30, /27, and /29 was used.

[Georg Pauwen · Accepted solution]

Hello,

make sure that the

default gateways

of the PCs and the switches point to the respective IP addresses that are actually configured on the router interfaces. In your case, the

default gateways

were pointing to non-existing IP addresses.

Also, the static routes need to look like this:

ip route x.x.x.x y.y.y.y (destination network/subnet mask) z.z.z.z (next hop)

In your case, you were specifying non-existing next hop addresses.

Review the attached revised file.