Description:
Werden auf einem Switch der GS-3xxx Serie in der Global VLAN Configuration bzw. in der Port VLAN Configuration VLAN-IDs hinterlegt, wird für jede VLAN-ID und jeden Switch-Port ein eigener Eintrag in der VLAN-Membership Tabelle erstellt. Bei sehr vielen hinterlegten VLANs und Überwachung der Ports bzw. der VLANs per SNMP führt dies dazu, dass die CPU-Last stark ansteigt und der Switch nur noch verzögert reagiert.
This article describes how this diesem Artikel wird beschrieben, wie das Verhalten vermieden werden kann.
Requirements:
- GS-3xxx series switch
- Any web browser for accessing the webinterface
Procedure:
1) Modifying the "Allowed Access VLANs" in the "Global VLAN Configuration":
1.1) Go to the menu VLAN Management → VLAN Configuration.
1.2 Under Global VLAN Configuration only VLAN IDs must be entered in the field Allowed Access VLANs, which are assigned to aport with the tagging mode Access (in this example the VLAN IDs 1,2 and 5).
Under no circumstances should all VLAN IDs from 1-4094 be entered in the field "Allowed Access VLANs", as this would lead to the behaviour described above!
2) Modifying the "Allowed VLANs" in the "Port VLAN Configuration":
2.1) Go to the menu VLAN Management → VLAN Configuration.
2.2) Under Port VLAN Configuration the Allowed VLANs are set to 1-4094 automatically (default setting) when setting the Mode to Hybrid or Trunk, which can lead to the behaviour described above.
It is currently in review if the default setting for Allowed VLANs can be changed to 1.
2.3) Therefore modify the field Allowed VLANs, so that only the used VLANs are entered (in this example the VLAN IDs 1,2 and 5).
