02-24-2017 06:32 AM - edited 03-08-2019 09:29 AM
I have been working with GNS3 a lot over the last 6 months and have been learning so much. I setup a simple network the other day and suddenly PC2 doesn't ping to my default-gateway. It states "host (192.168.1.1) not reachable. PC1 pings fine. My setup is a Router - Switch - PC1 and PC2
I never had this problem before and it makes me thing it's a GNS3 problem suddenly.
R1(config): int f0/0
R1(config-if): no shut
R1(config-if): ip address 192.168.1.1 255.255.255.0
ESW1(config): int vlan 1
ESW1(config-if): no shut
ESW1(config-if): ip address 192.168.1.2 255.255.255.0
ESW1(config-if): ip default-gateway 192.168.1.1
VPCS1: ip 192.168.1.3 255.255.255.0 192.168.1.1
(This PC pings fine)
VPCS2: ip 192.168.1.4 255.255.255.0 192.168.1.1
(This is where the problem begins and on any other PC I add suddenly. Never had this problem before)
I've attached my GNS3 file as well in zip form.
02-24-2017 06:56 AM
Hi
devices in the same subnet arp to eachother and don't require routing so if your arp is complete for both pcs ips and the macs are complete then the issue is with the software , its an emulator and they can be quite buggy , your config looks correct and the fact pc1 works proves it as there identical setup
02-24-2017 07:39 AM
Please use the supported generic switch in GNS3 (has no console and can be configured via GUI). I think it's related to the unsupported VM switch.
12-30-2024 10:01 AM
si, es asi !! el sw no esta soportado ., tenia el mimsmo problema y cambiando el sw se soluciono
02-24-2017 08:24 AM
Hey [@eschubauer@mjpeterson.com] '
I have configured a mirrored topology & configuration into GNS3 & I can successfully ping from both PC's to Router (192.168.1.1) IP Address.
Ping & Configuration screen shots are attached for your review.
Moreover please share the output of command show ip int br form the switch & router.
Regards'
03-01-2017 05:10 PM
Thank you everybody for your input. I use an ethernet switch and for some reason need to make sure the speeds and duplexes are exact. After correcting that I was able to ping again.
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