I've five custom ethernet switch device in my network (custom ethernet switch include stm32+microchip ethernet switch). They have RSTP protocole and blocking loops perfectly. But when I connect the device cascad my connection like this PC-SW1-SW2(RootBridge)-SW3-SW4-SW5, when I start to ping my device SW3 not pinging SW4-SW1-SW5 pinging successfully but after the Root Bridge device I could not ping. When I disable the RSTP on my switch they communicate successfully. How could I found my problem, I check between SW1 and SW2 device SW1 route all ping to SW2, but SW2 couldnt forward SW3's ICMP and ARP packets. What is the reason for anybody have an idea?
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Please check Ip access list , range IP and Also check arp cache list , if mac of device is not exist you have problem in layer 1 and 2 , You need Troubleshoot each item one by one– MohammadReza moeiniFeb 5, 2021 at 7:09
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every device IP address and MAC addresses different and There is 1 difference between them.I wonder if having 1 difference. But network between just these device. There is no another device on the network.– hobikFeb 5, 2021 at 7:31
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I notice something, when I send gratious ARP 100ms periodicly from SW3, Ping successfull why the solve my problem gratious ARP packets or its correct ?– hobikFeb 5, 2021 at 8:28
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please check it happend for layer 2 or for layer 3 is same , with command tools like mac ping– MohammadReza moeiniFeb 5, 2021 at 8:35
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how can I check layer 2 and layer 3 same, I am using linux, sorry for the question I am new learning.– hobikFeb 5, 2021 at 8:43
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