Thursday, January 27, 2022

MTU Settings in Virtual Network Devices

When I finally1 managed to get SR Linux running with netsim-tools, I wanted to test how it interacts with Cumulus VX and FRR in an OSPF+BGP lab… and failed. Jeroen Van Bemmel quickly identified the culprit: MTU. Yeah, it’s always the MTU (or DNS, or BGP).

I never experienced a similar problem, so of course I had to identify the root cause:


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