10-18-2022 07:05 AM
Hi All,
I'm a student and I am creating this network in packet tracer and it has 4 networks which are each conected to a switch. the IP address ranges are the following:
172.16.0.0
172.16.1.0
192.168.0.0/25
192.168.0.128/25
The 172 address each have a switch that connect to a single router as do the 192 address. Now these these two routers are connected to a single router. This middle router has 2 ports where one is 10.0.0.0 and the other is 10.0.1.0.
The PC's in each network have DHCP turned on and are able to ping the other PC's connected to the same switch but are unable to ping the router or the other devices connected on the other networks. I have attempted to use static routes and it only seems to work for one network (192.168.0.0/25 bottom right hand corner) where these PC's are able to ping the first connected router, then the middle router and then the last router. unfortunatly it crashes here and it cannot find the switch or devices that are connected to that router.
I've tried to find other solutions on the internet as well as here on the cisco site but I have not been able to find anything has helped solve the problem. Would really appreciate some guidance and pointers on what perhaps to try
Solved! Go to Solution.
10-19-2022 09:32 AM
Here is Part 2. Listed below are two more networks, their configured gateway, and their actual gateway. Do you notice anything?
____Network_________Gateway______Actual Gateway_____________
_192.168.0.0/25____192.168.0.127___Router-C___F1/0___192.168.0.1
192.168.1.128/25___192.168.0.254___Router-C___F0/0___192.168.0.129
The configured gateway and the actual gateway IP addresses do not match. In fact, the configured addresses do not exist on either of the three routers. Since the hosts on these networks are using DHCP, the gateway assignment needs to be corrected on the applicable device. [Note: one of the incorrect gateway address is 192.168.0.127/25...this is not a valid address as it is the broadcast address for that network.]
Once the correction is made, devices in these two networks, should be able to communicate with each other. No static route is needed as both networks are directly connected to router-C.
This will keep you going. I will continue checking the routers and the networks between them.
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10-18-2022 07:41 AM - edited 10-18-2022 07:50 AM
Please provide the zipped Packet tracer file. Also, a topology image and instructions if you have them.
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10-19-2022 06:33 AM
Hi NetworkDave,
I've attached the zipped tracer file, a image of the network layout and a text file that contains each router config as it would be too long to place within the post.
Basically i have 4 networks running and the first part of the task was to be able to ping other devices connected to the same switch which were on the same network and i achieved that. The next part is to create routing so that a device from the 192.168.0.0/25 network can ping a device in the 172.16.0.0/24 network and vice versa. The 172 networks are on the left side and the 192 networks are on the right. The middle router has 10.0.0.0/24 and 10.0.1.0/24 network.
After attempting a few solutions from online i was only able to get the 192.168.0.0/25 network to ping all 3 routers. a tracert showed it making it to the 10.0.0.2 router but there it would get stuck. But the devices on the other network could not even reach their first respective router. i have a look at placing static routing and rip routing. Bryson F mentioned EIGRP which I attempted as well but wasn't able to see any results after trying to ping/tracerts.
the routers also have DHCP so the PC's will have their IP's auto assigned. i think i may have messed up a setting or i haven't setup something properly.
Thank you all again.
10-19-2022 10:34 AM
Out of curiosity for your course did it specify to make these configs?
ip dhcp pool NAME
network 172.16.0.0 255.255.255.0
default-router 172.16.0.254
Just curious since it is duplicating the ip dhcp pool Purple configs on routers A and B. Be sure to use commands in your privellege exec mode (router#) like "show log" to try and find things it puts out like duplicate IP addresses and commands like "show interface status" as well. But go through your router A and B on their interfaces if possible put their commands side to side and remember you cannot have two identical addresses in a network. Just out of curiosity what kind of course is this for? no need to answer if you don't want to.
But the traceroute in a switch and tracert in a PC are very useful tools since it is a simulation you wont have a physical layer issue but it often times can point you in the right direction. Use your pings like a ladder and ping one step away at a time say you are on a pc in your 192.168.x.x network ping to the switch the ping to the router directly connected and so forth and the issue can be more focused on a certain area.
i am sure network dave doesnt want to solve the issue for you per say since you are a student but we may help point you in the right direction and be able to explain why.
10-18-2022 11:13 AM
could you share router configs. DHCP configs? is ip routing enabled or maybe EIGRP?
10-19-2022 08:15 AM
Listed below are two networks, their configured gateway, and their actual gateway. Do you notice anything?
__Network________Gateway____ Actual Gateway_____________
172.16.0.0/24___172.16.0.254___Router-A___F0/0___172.16.0.1
172.16.1.0/24___172.16.1.254___Router-A___F1/0___172.16.1.1
The configured gateway and the actual gateway IP addresses do not match. In fact, the configured addresses do not exist on either of the three routers. Since the hosts on these networks are using DHCP, the gateway assignment needs to be corrected on the applicable device.
Once the correction is made, devices in the two networks, should be able to communicate with each other. No static route is needed as both networks are directly connected to router-A.
This will get you started. I will continue checking the other networks.
----------------------------------------------------------------------------------------------------
Remember to mark helpful posts and mark the correct answer as a solution; It helps other users with similar questions.
10-19-2022 09:32 AM
Here is Part 2. Listed below are two more networks, their configured gateway, and their actual gateway. Do you notice anything?
____Network_________Gateway______Actual Gateway_____________
_192.168.0.0/25____192.168.0.127___Router-C___F1/0___192.168.0.1
192.168.1.128/25___192.168.0.254___Router-C___F0/0___192.168.0.129
The configured gateway and the actual gateway IP addresses do not match. In fact, the configured addresses do not exist on either of the three routers. Since the hosts on these networks are using DHCP, the gateway assignment needs to be corrected on the applicable device. [Note: one of the incorrect gateway address is 192.168.0.127/25...this is not a valid address as it is the broadcast address for that network.]
Once the correction is made, devices in these two networks, should be able to communicate with each other. No static route is needed as both networks are directly connected to router-C.
This will keep you going. I will continue checking the routers and the networks between them.
----------------------------------------------------------------------------------------------------
Remember to mark helpful posts and mark the correct answer as a solution; It helps other users with similar questions.
10-19-2022 12:08 PM
The routing between the networks has been successfully checked and tested. Once you correct the gateway assignments issued by the DHCP, you should be good.
Also, @Bryson F has provided some helpful information to aid you in troubleshooting.
HTH
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10-20-2022 06:59 AM
I applied the changes you recommeded and it worked perfectly. Changing it in the router allowed the pc's to ping other devices across the network with no problems.
Appreciate the help from you guys.
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