Vlan Add and Vlan Strip. Archived from groups: comp.dcom.lans.ethernet () Hi all, Can anyone explain the phenomenan of Vlan add and Vlan strip. Why it is required? I have this brief knowledge that a Switch DUT when it receives a packet with VLAN TAG,...

needs to strip pad (does this > happen?) and It doesn't *need* to strip the pad; you stated it as a *given* that the device stripped the pad. It would be perfectly OK to add the VLAN tag, *not* strip the pad, and send out a 68 byte frame. This...

2) Complex 1 => This attack is described on and to work need that the attacker and the trunk share same native vlan ( ex. VLAN 10 ). In this doc. the attacker send on the access port ( VLAN 10 ) a tagged frame with a VLAN-ID of target VLAN ( ex. VLAN 20...

a VLAN correspondance for every packet and >> then forward the packet accordingly. >>No. It will drop pacekets intended for other VLANS. And what does this have to do with the untagged VLAN of a port? There may be several tagged VLANs defined on this...

part of the VLAN marked as being the PVID for the port. In your configuration, for example, you would not be able to tell the difference between traffic that was intended for VLAN 1 (but had its tag stripped because 802.1Q says the PVID goes out untagged)...

e.g. [taken from the documentation] vlan database vlan 2 name R&D media ethernet state active end interface ethernet 1/1 switchport allowed vlan add 2 tagged interface ethernet 1/2 switchport allowed vlan add 2 untagged The first part creates...

ago for a model >> which required that one set the egress port to match the VLAN # of the >> port to be monitored, and the VLAN tag always got stripped out. >> Monitoring a complete trunk was not possible on that device. >>>>>> With regards to software:...

port, and traffic out a tagged port will usually show up tagged on the mirroring port, unless the primary vlan ID of the port happens to match the VLAN ID of the packet, in which case 802.1Q says the tag should be stripped. In any case, in your original...

costly* router function to strip ethernet and put another L2 header. You can get away with having just an ethernet switch. o The QoS/VLAN information remains *intact* across ISPs network. o You basically get an L2 VPN inexpensively. >> ppp-over...

speaking, is any link in which the VLAN tags are transmitted as part of the data. A non-trunk, sometimes called an "access port" is a link in which the VLAN tags are stripped before transmission, and which does not expect VLAN tags to be received. Trunks...