topic Vlan passthrough in Network Security https://community.cisco.com/t5/network-security/vlan-passthrough/m-p/1881679#M457830 <P>Dear experts,</P><P></P><P>I'm having trouble configuring my ASA 5510 firewall for passthough vlans.</P><P>I want to passtrough vlans from the "outside" interface to the "lan" interface.</P><P></P><P>The ISP provides VOIP as a service to our company on the same internet connection on the seperate Vlan.</P><P>The ASA has to filter the internet access (untagged traffic) but has to pass trough the voice traffic (tagged traffic)</P><P>to the lan interface. the ISP also provides DHCP for my ip phones, so the asa also has to passtrough dhcp requests.</P><P>do i need DHCP relay?</P><P></P><P>i'll tried to connect 1 vlan to multiple fysical interfaces but i get an error message that this is not posible</P><P></P><P>Is this posible using the ASDM interface or do i need to configure this by the CLI?</P><P></P><P>I attached a drawing how the environment must look like.</P><P></P><P>Hope someone can help me out here.</P> Mon, 11 Mar 2019 22:45:49 GMT everstege 2019-03-11T22:45:49Z Vlan passthrough https://community.cisco.com/t5/network-security/vlan-passthrough/m-p/1881679#M457830 <P>Dear experts,</P><P></P><P>I'm having trouble configuring my ASA 5510 firewall for passthough vlans.</P><P>I want to passtrough vlans from the "outside" interface to the "lan" interface.</P><P></P><P>The ISP provides VOIP as a service to our company on the same internet connection on the seperate Vlan.</P><P>The ASA has to filter the internet access (untagged traffic) but has to pass trough the voice traffic (tagged traffic)</P><P>to the lan interface. the ISP also provides DHCP for my ip phones, so the asa also has to passtrough dhcp requests.</P><P>do i need DHCP relay?</P><P></P><P>i'll tried to connect 1 vlan to multiple fysical interfaces but i get an error message that this is not posible</P><P></P><P>Is this posible using the ASDM interface or do i need to configure this by the CLI?</P><P></P><P>I attached a drawing how the environment must look like.</P><P></P><P>Hope someone can help me out here.</P> Mon, 11 Mar 2019 22:45:49 GMT https://community.cisco.com/t5/network-security/vlan-passthrough/m-p/1881679#M457830 everstege 2019-03-11T22:45:49Z