03-04-2023 08:38 AM - edited 03-04-2023 08:39 AM
*First of all i want to apologize for my bad english*
I need some help with the routing.
Problems: I can't send pings from BORDER1 and BORDER2 to any other border router, but it does recieve ping from all of the border routers.
I can send pings from BORDER1 to the ISP routers.
I can only ping BORDER1 and BORDER2 from other border routers, but i can't ping the rest of them with each other (for example i cant ping BORDER4 from BORDER3). The ping only goes to the ISP, and not further
On the ISP routers i configured OSPF and advertised the route towards the border routers and to the another ISP.
On the Border routers i configured static routing towards to the ISP (like this: ip route 0.0.0.0 0.0.0.0 Se0/0)
I don't really know why is it not working, when i learned these things, i did not have to configure the routing with static and dynamic at the same time (probably because we did not try to do that with ISP router)
When we did the routing in school, we configured OSPF on every router, or we configured static routing, but it was not 0.0.0.0, but the actually network address.
Solved! Go to Solution.
03-04-2023
11:34 AM
- last edited on
03-06-2023
01:40 AM
by
Translator
Friend I will do simple trick you can solve ALL routing issue in ALL case
point1
do traceroute to destination, when the traceroute is stop check point 2
point2
count how many subnet in network, let assume it is 10
you must see all 10 subnet in ANY router
OR
you must see
connect subnet + default route
in ANY router
these two simple points SOLVE all routing issue in ALL topology in ALL case.
good luck
03-04-2023
08:50 AM
- last edited on
03-06-2023
01:31 AM
by
Translator
With that information - we can not say what is wrong here :
I would suggest to post below output from all devices
show run
show IP interface brief
show ospf neigh
show IP arp
show cdp neigh
03-04-2023 09:54 AM
these files contains all of the information that you asked
on the border routers, i do not have any information about the ospf neighbor, because the ospf is only "linked" between the ISP routers, and the cdp neighbor was not enabled on any router except BORDER5 router
03-04-2023
11:34 AM
- last edited on
03-06-2023
01:40 AM
by
Translator
Friend I will do simple trick you can solve ALL routing issue in ALL case
point1
do traceroute to destination, when the traceroute is stop check point 2
point2
count how many subnet in network, let assume it is 10
you must see all 10 subnet in ANY router
OR
you must see
connect subnet + default route
in ANY router
these two simple points SOLVE all routing issue in ALL topology in ALL case.
good luck
03-05-2023 01:29 AM
Hello,
if this is a Packet Tracer project, post your zipped Packet Tracer project (.pkt) file...
03-05-2023 03:12 AM
Hello,
Show routing table from all of the border routers.
03-05-2023 05:53 AM
I found something.
I used the PDU ping all along, so i tried to ping in Privileged EXEC mode, it does work (everywhere) between the routers. So the routing is fine.
But i still did not know why can't i ping from Border 1 to any other router using the PDU, so i checked the PDU ping tracer, like MHM Cisco World said, the destination was not the Router's public IP adress, but the router's private network (i dont know why). After i edited the destination IP to the public IP it did work.
So i dont know why did it change itself, but it does work fine now
Thank you guys for the help
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