#HIRSCHMANN SWITCH TAG VS UNTAG SETUP REGISTRATION#

GVRP then places interswitch ingress ports (3) and (4), then (5) and (6) on VLAN 5's egress list. When A is tagged with VLAN 5, Dynamic Egress places A's ingress port (2) on VLAN 5's egress list. Endstation B does not send responses, so the Administrator must place B's ingress port on VLAN 5's egress list manually (1). In this example, Dynamic Egress is enabled for VLAN 5, but the destination endstation, B, is a 'silent' endpoint, like a printer. But VLAN 5 traffic for both A and B is discarded, because VLAN 5 is not aware of the ingress ports for A and B. GVRP places interswitch ingress ports (3) and (4) on VLAN 5's egress list. When B's traffic is tagged with VLAN 5, B's ingress port is not placed on VLAN5's egress list. GVRP places interswitch ingress ports (1) and (2) on VLAN 5's egress list.

When source endstation A is tagged with VLAN 5, A's ingress port is not placed on VLAN 5's egress list. In this example, Dynamic Egress is disabled. The devices can then forward traffic to both endstations. GVRP then places interswitch ingress ports (5) and (6) on VLAN 5's egress list. When B's traffic is tagged with VLAN 5, Dynamic Egress places B's ingress port (4) on VLAN 5's egress list. GVRP then places interswitch ingress ports (2) and (3) on VLAN 5's egress list. When A is tagged with VLAN 5, Dynamic Egress places A's ingress port (1) on VLAN 5's egress list. In this example, Dynamic Egress is enabled for VLAN 5, and the destination endstation, B, is on a different device from the source endstation,Р”Р„. The device can then forward traffic to both endstations. When destination endstation B's traffic is tagged with VLAN 5, Dynamic Egress places B's ingress port (2) on VLAN 5's egress list. When source endstation A is tagged with VLAN 5, Dynamic Egress places A's ingress port (1) on VLAN 5's egress list. In this example, Dynamic Egress is enabled for VLAN 5. For this reason, the best application of Dynamic Egress is for containing undirected traffic on 'chatty' clients which utilize, for example, IPX, NetBIOS, AppleTalk, and/or broadcast/multicast protocols such as routing protocols.

For example, if there is a 'telnet' rule and two users (A & B) are on ports whose role includes a service containing the 'telnet' rule, if User B has not utilized the 'telnet' rule within the five minute time frame, User A will not be able to telnet to User B. The result is that an endstation will appear 'silent' if the VLAN has not been used within that time period.

If no packets are tagged with the applicable VLAN on a port within five minutes, Dynamic Egress list entries will time out. Dynamic Egress and GVRP take care of adding the other ingress ports to the VLAN's egress list. If an endstation is talking to a 'silent' endstation which does send responses, like a printer, you will need to add the silent endstation's ingress port to the VLAN's egress list manually with a tool like NetSight Device Manager, or local management. If you want a VLAN to act as a discard VLAN, disable Dynamic Egress for that VLAN. Since the destination port is not added to the egress list of the VLAN, the device discards the traffic. When you disable Dynamic Egress for a VLAN, the VLAN effectively becomes a discard VLAN.

#HIRSCHMANN SWITCH TAG VS UNTAG SETUP REGISTRATION#

You can enable GVRP (GARP VLAN Registration Protocol), which automatically adds the interswitch ingress ports to the egress lists of VLANs. (See Example 1, below.)Р”Вynamic Egress affects only the egress lists for the source and destination ingress ports. This means that you do not need to add the ingress port to the VLAN's egress list manually. When Dynamic Egress is enabled for a VLAN, any time a device tags a packet with that VLAN ID, the ingress port is automatically added to the VLAN's egress list, enabling the reply packet to be forwarded back to the source. In ExtremeCloud IQ - Site Engine, you can control whether or not Dynamic Egress is enabled for a VLAN in the VLAN Definitions table. If the port is not on the Egress List, or if the port is not operational, the frame is discarded. The frame is transmitted as tagged or untagged according to the specification in the Egress List.

If the port is listed on the Egress List of the VLAN associated with it, the frame is then transmitted according to the priority assigned to the frame. When a frame is transmitted out a port, the device first checks the Egress List. You can add or remove ports to or from a VLAN's Egress List, thereby controlling which VLAN's frames can be forwarded out which ports. Each VLAN has an Egress List that specifies the ports out of which frames can be forwarded, and specifies whether the frames will be transmitted as tagged or untagged frames. Interface Robustness (Robustness Variable)Р”Р„ device determines which frames can be transmitted out a port based on the Egress List of the VLAN associated with it.The following concepts will assist you in configuring VLAN and port template definitions in ExtremeCloud IQ - Site Engine.

Hirschmann switch tag vs untag setup