Monday, October 5, 2020

Extreme Switch - STP is enabled by default in EXOS

Yes. Starting from EXOS 22.2, the STP is enabled by default.

With STP enabled, all ports start in the blocked state. Once the ports become active, then the ports go through the rest of the STP process of listening, Learning, and then forward the traffic.

Therefore, when you check the inactive ports, it shows as blocked when using the default configuration in EXOS 22.2 as below.

exos-switch # show vlan Default
VLAN Interface with name Default created by user
    Admin State:         Enabled     Tagging:   802.1Q Tag 1
    Description:         None
    Virtual router:      VR-Default
    IPv4 Forwarding:     Disabled
    IPv4 MC Forwarding:  Disabled
    IPv6 Forwarding:     Disabled
    IPv6 MC Forwarding:  Disabled
    IPv6:                None
    STPD:                s0(Enabled,Auto-bind)
    Protocol:            Match all unfiltered protocols
    Loopback:            Disabled
    NetLogin:            Disabled
    OpenFlow:            Disabled
    QosProfile:          None configured
    Egress Rate Limit Designated Port: None configured
    Flood Rate Limit QosProfile:       None configured
    Ports:   34.          (Number of active ports=0)
       Untag:      1b,     2b,     3b,     4b,     5b,     6b,     7b,
                   8b,     9b,    10b,    11b,    12b,    13b,    14b,
                  15b,    16b,    17b,    18b,    19b,    20b,    21b,
                  22b,    23b,    24b,    25b,    26b,    27b,    28b,
                  29b,    30b,    31b,    32b,    33b,    34b
        Flags:    (*) Active, (!) Disabled, (g) Load Sharing port
                  (b) Port blocked on the vlan, (m) Mac-Based port
                  (i) Port inactivated on the vlan due to VXLAN configuration
                  (a) Egress traffic allowed for NetLogin
                  (u) Egress traffic unallowed for NetLogin
                  (t) Translate VLAN tag for Private-VLAN
                  (s) Private-VLAN System Port, (L) Loopback port
                  (x) VMAN Tag Translated port
                  (G) Multi-switch LAG Group port
                  (H) Dynamically added by MVRP
                  (I) Dynamically added by IDM
                  (U) Dynamically added uplink port
                  (V) Dynamically added by VM Tracking

* Reference links:
STP is enabled by default on EXOS switches

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