Error code
Sophos All models code UTM-1332
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Meaning
The number of VLANs supported per interface is dictated by the Ethernet Controller used by the NIC. 82599ES based ethernet controllers support up to 64 VLANs.XL710 based ethernet controllers support up to 256 VLANs, but share forwarding/routing tables with other features and this number is smaller in practice. It ranges between 100 and 180 depending on features in use. The aforementioned Ethernet Controllers are used by the following NICs: Other modules may support more or less VLANs. An indication that the threshold is being crossed is the existence of the following log in dmesg (or kernel.log on UTM): i40e 0000:04:00.0: Error I40E_AQ_RC_ENOSPC, forcing overflow promiscuous on PF If the log above is being seen, lower the amount of VLANs per interface and spread them across multiple interfaces until the logs are no longer generated - this should improve performance
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