ExtremeXOS provides support for STP (Spanning Tree Protocol) with NetLogin campus mode.
If NetLogin is authenticating a client in campus mode on a port, then that port is moved/added to list of authentication VLAN (Virtual LAN)s (provided in VLAN VSA), and as a consequence the port could be removed from the VLANs where it is currently present. Due to this constant port/VLAN movement in campus mode, any STP configuration on the port could be lost; so to protect the port by STP, autobind needs to be configured on the list of authentication VLANs provided in VLAN VSA.
For example, configure RSTP with autobind on VLANs V1, V2, and V3 assuming that there are no ports associated to any of those VLANs. NetLogin moves the ports to the VLANs as when clients get authenticated. As the ports are added to the VLAN, RSTP inherits only tagged ports or untagged ports, depending on the default encapsulation configured for the S1 domain. If S1 is configured with default-encapsulation PVST+ or EMISTP, and if NetLogin adds port P1 to V1 (tagged), then RSTP inherits port P1. This occurs dynamically, and if port P1 is removed from VLAN V1, then port P1 is automatically removed from S1.
This feature is generic and applicable to all STP operational modes.
ExtremeSwitching and Summit X450-G2, X460-G2, X670-G2, X770, X440-G2, X590, X620, X870 series switches.
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