Destination Host Unreachable

[olzhik]

Whenever I try to ping "PC-A" to "PC-C" it says "Destination Host Unreachable", I use vlan 30 for PC-C and vlan 40 for PC-D

pkk file: https://drive.google.com/file/d/1RPaWgtuWZUl1Pnm6PWUS70isN73lsiLd/view?usp=sharing

[Martin L]

You do not have any routes; neither dynamic or static;  Routers know about their directly connected interfaces and put them into routing table; see ip route .  So, there is no need to do  anything for vlan 10 and 20 172.30.10.0/24 and 172.30.20.0/24 which are directly connected on B1R2. But check other routers; do they have routes to reach vlan 10 and 20? use show ip route to see routes.  Routers will use ICMP message "Destination Host Unreachable" to inform us about missing routes.

Adding static routes or dynamic protocols like EIGRP or OSPF is the next step; Add router ospf 1 and network 0.0.0.0 255.255.255.255 area 0 on all routers and ping everyone; if pings are ok, then replace ospf with eigrp and run all pings; then remove eigrp and add static routes. Test with pings; use show ip rotue x.x.x.x to see if u have routes or missing ones. (simple testing your skills)

There is also missing ip address on one of router's interfaces ! Can u find it?

Regards, ML
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[M02@rt37]

Hello @olzhik

First on B2R2 router configure IP on serial 0/0/1:

After that, you need ip static routes on ALL routers:

Miss: ip route 172.30.20.0 255.255.255.0 192.168.1.2

You will be able to ping PCs each others.

[olzhik]

I did everything, yet I'm still not able to ping PC-D to PC-B it gives me the same error, how could I fix that? I'm able to ping everything else

[M02@rt37]

OK @olzhik 

-Share #sh ip route output of all Routers.

-Check connectivity between Routers doing a ping.

-Do the PCs ping their own Gateway?

[olzhik]

Yes, PCs ping their own gateway, and the connectivity is fine.

Here is the new pkk file: https://drive.google.com/file/d/1RPaWgtuWZUl1Pnm6PWUS70isN73lsiLd/view?usp=sharing

[M02@rt37]

@olzhik 

On HQR2 router, miss the static route towards 172.30.20.0/24

Please add on that router under configure-terminal:

ip route 172.30.20.0 255.255.255.0 192.168.1.2

- Always check routing table in this case. You could verify if subnets are well routed or not.

[olzhik]

Can't ping PC-B from PC-Z as well. Is there a fix for that?