Spanning Tree Domains
ExtremeWare XOS 11.3 Concepts Guide
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â—Ź Listening
A port in the listening state does not accept ingress traffic, perform traffic forwarding, or learn MAC
source addresses. The port does receive STP BPDUs. This is the first transitional state a port enters
after being in the blocking state. The bridge listens for BPDUs from neighboring bridge(s) to
determine whether the port should or should not be blocked.
â—Ź Learning
A port in the learning state does not accept ingress traffic or perform traffic forwarding, but it begins
to learn MAC source addresses. The port also receives and processes STP BPDUs. This is the second
transitional state after listening. From learning, the port will change to either blocking or forwarding.
â—Ź Forwarding
A port in the forwarding state accepts ingress traffic, learns new MAC source addresses, forwards
traffic, and receives and processes STP BPDUs.
â—Ź Disabled
A port in the disabled state does not participate in STP; however, it will forward traffic and learn
new MAC source addresses.
Binding Ports
The two ways to bind (add) ports to an STPD are: manually and automatically. By default, ports are
manually added to an STPD.
NOTE
The default VLAN and STPD S0 are already on the switch.
Manually Binding Ports
To manually bind ports, use one of the following commands:
â—Ź configure stpd <stpd_name> add vlan <vlan_name> ports [all | <port_list>] {[dot1d
| emistp | pvst-plus]}
â—Ź configure vlan <vlan_name> add ports [all | <port_list>] {tagged | untagged}
{nobroadcast} stpd <stpd_name> {[dot1d | emistp | pvst-plus]}
The first command adds all ports or a list of ports within the specified VLAN to an STPD provided the
carrier VLAN already exists on the same set of ports. The second command adds all ports or a list of
ports to the specified VLAN and STPD at the same time. If the ports are added to the VLAN but not to
the STPD, the ports remain in the VLAN.
If the specified VLAN is not the carrier VLAN and the specified ports are not bound to the carrier
VLAN, the system displays an error message.
NOTE
The carrier VLAN’s VLANid must be identical to the StpdID of the STP domain.
If you add a protected VLAN or port, that addition inherits the carrier VLAN’s encapsulation mode
unless you specify the encapsulation mode when you execute the
configure stpd add vlan or
configure vlan add ports stpd commands. If you specify an encapsulation mode (dot1d, emistp,
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