Responding to unblocking of a switch port

A non-transitory machine-readable storage medium storing instructions that upon execution cause a switch to:

• detect that a port of the switch has changed from a blocked state to an unblocked state;
• in response to the detecting, wait a specified amount of time that is based on a loop detect time interval used by a loop protect process for detecting a loop in a network;
• after waiting the specified amount of time, determine whether the port remains in the unblocked state;
• and
• in response to determining that the port remains in the unblocked state after waiting the specified amount of time, learn virtual network information associated with the port.

A method comprising:

• receiving, by a switch, an event associated with unblocking of a port of the switch;
• in response to the event associated with the unblocking of the port, waiting, by the switch, a specified amount of time that is based on a loop detect time interval used by a loop protect process for detecting a loop in a network;
• in response to expiration of the loop detect time interval:
• determining, by the switch, whether a loop is present in the network, and
• blocking the port in response to determining that a loop is present in the network;
• after waiting the specified amount of time, determining, by the switch, whether the port remains unblocked;
• and
• in response to determining that the port remains unblocked after waiting the specified amount of time, learning, by the switch, virtual network information associated with the port.