Hi j.blakley thanks for your reply. This is a simple scenario router is configured to use router on a stick for inter-vlan routing, the link between router and switch is trunk. Switch uses an access port to connect to the pc and also this port is in the default vlan. Nothing special here.
I've made a research and come across the following list.
1. ping 127.0.0.1
2. ping gateway
3. ping management vlan
4) Check switch overutilization
5) use debug ip routing on the router
6) ping from router the switch management vlan
7) check the MTU size on Router and on the Switch
8) Misconfigured access list on the router.
9) Switch Flooding
10) Check the logs on router and switch.
11) Duplex mismatch
From your point of view which are the correct steps to take from the above list and in which order, to resolve the issue
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