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ERSPAN MTU Size not going above 1500

phil.g.james
Level 1
Level 1

Can anyone help please? I have an issue with running an ERSPAN on a Nexus C93108-TC-EX switch running nxos 9.3.12

Is it possible to have an ERSPAN session that will handle packets larger that 1500 MTU?

The interfaces that I am spanning and sending traffic to all have MTU 9216 but the ERSPAN seems to drop any packets that are above around 1400 bytes as it only seems to allow a maximum of 1500 minus the ERSPAN header as ERSPAN does not allow fragmentation.

I thought ERSPAN on this type of switch could go up to 9216 minus the ERSPAN header?

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