Because MAC addresses and their port/VLAN associations are known at configuration time, you can create static MAC addresses, then create ingress ACLs to whitelist traffic from these MAC addresses and drop traffic otherwise. To prevent this from happening, Cumulus Linux filters frames before MAC learning occurs. This can be a security or resource problem as the MAC address table has the potential to get filled with bogus MAC addresses a malfunctioning host, network error, loop, or malicious attack on a shared layer 2 platform can create an outage for other hosts if the same MAC address is learned on another port. This is due to how the hardware learns MAC addresses and occurs before the ACL lookup. On Broadcom switches, a MAC address is learned on a bridge regardless of whether or not a received packet is dropped by an ACL. If you are redirected to the main page of the user guide, then this page may have been renamed please search for it there. The current version of the documentation is available If you are using the current version of Cumulus Linux, the content on this page may not be up to date. Resource Diagnostics Using cl-resource-query.Using Nutanix Prism as a Monitoring Tool.

Simple Network Management Protocol - SNMP.Monitoring System Statistics and Network Traffic with sFlow.Using NCLU to Troubleshoot Your Network Configuration.Monitoring Interfaces and Transceivers Using ethtool.Understanding the cl-support Output File.Network Switch Port LED and Status LED Guidelines.Unequal Cost Multipath with BGP Link Bandwidth.Equal Cost Multipath Load Sharing - Hardware ECMP.Bidirectional Forwarding Detection - BFD.Hybrid Cloud Connectivity with QinQ and VXLANs.

Ethernet Virtual Private Network - EVPN.

Virtual Router Redundancy - VRR and VRRP.

Default Cumulus Linux ACL Configuration.

Authentication, Authorization and Accounting.

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