Does anyone know of any negative side effects of setting a higher MTU on a WAN?
Say ~1540 instead of 1500.
I'm having an issue where the default 1500 MTU on my WAN causes OSPF to not work, lower MTU causes apps that can't fragment to not work.
It seems like a higher MTU makes everything work.
Outside of small differences in latency or throughput, are there any other negative consequences I should think about?
In case it matters, I'm setting the higher MTU on the WAN interface on my routers(the ISP is matching my settings on their routers), the inside interfaces on my routers are default 1500 MTU.
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