I have 3 Interfaces:
External: DSL (PPPoE) MTU 1492
Internal: Ethernet MTU 1500
Guests: Ethernet MTU 1500
From time to time I have timeouts issues to access some websites, access Guests clients from Internal clients.
Should I set External, Internal and Guests MTU to 1492? and How to tell what MTU is used by my ISP?
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