When your Cisco switches receive an Ethernet frame without a tag on an 802.1Q enabled interface, it will assume that it belongs to the native VLAN. For this reason, you need to make sure that the native VLAN is the same on both sides. By default, VLAN 1 is the native VLAN. We can change this if we want. Let’s look at an example.
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When speaking about VLAN ports in HP world, the ports can be tagged or untagged (despite the access / trunk ports in Cisco). As you may guess, tagging means 802.1q tagging in Ethernet frames. It is important to realize that Cisco is “port-centric”, whereas Procurve is is “vlan-centric” when speaking about vlan port assignment.
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Hello, I am trying to get a Cisco 4506 and a Procurve ProCurve 2810-48G to pass VLAN traffic between them using 802.1q. Port 18 on the Cisco is connected to Port 2 on the HP
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Cisco also implemented VLANs over FDDI by carrying VLAN information in an IEEE 802.10 frame header, contrary to the purpose of the IEEE 802.10 standard. Both ISL and IEEE 802.1Q tagging perform explicit tagging – the frame itself is tagged with VLAN information.
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VLANs help to organize large networks. Configure a VLAN on a Cisco Router by using a sub interface. CISCO2811-AC-IP The sub interface commands allow you to specify that the interface should encapsulate frames according to the IEEE 802.1Q standard.