Managing VLANs with SNMP
This section describes how we attempt to rename, add or delete vlans on devices using SNMP.
“Generic” SNMP
In the SnmpConnector() object, defined in switches/connect/snmp/connector.py, we implement Vlan Adding and Editing for SNMP-managed devices. See def vlan_create(), vlan_edit() and vlan_delete()
This functionality implements the most common way of doing this on SNMP devices, using atomic (set-multiple) writes to two OIDs.
In def vlan_create(self, vlan_id, vlan_name) , we write to dot1qVlanStaticRowStatus.<vlan id> and set it to createAndGo(4). This should work on most devices that implement the Q-Bridge MIB. However, some devices may need to set createAndWait(5). If your device needs a different sequency, please override this function in your device driver!
def vlan_delete() calls on dot1qVlanStaticRowStatus.<vlan id> and sets it to destroy(6), to remove a vlan.
Cisco Specific
For Cisco Catalyst devices, we follow the steps outlined here: