TAP interface created automatically

Discussion in 'Proxmox VE: Networking and Firewall' started by rujoesmith, Feb 5, 2019.

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  1. rujoesmith

    rujoesmith New Member

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    I noticed that my router was assigning 2 ip's to proxmox. I can ssh and access the webgui through both of them. It seems like a tap interface was created and is somehow connected to vmbr1. Vmbr1 is my LAN interface hooked to the router. This is a fairly fresh install, I haven't changed much yet and am just trying to learn the basics.

    Could anyone explain what tap100i1 is and if/how I should disable it?

    Code:
    6: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP grou                   p default qlen 1000
        link/ether ac:1f:6b:49:6f:1c brd ff:ff:ff:ff:ff:ff
    7: vmbr1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP grou                   p default qlen 1000
        link/ether ac:1f:6b:49:6f:1d brd ff:ff:ff:ff:ff:ff
        inet 192.168.1.148/24 brd 192.168.1.255 scope global vmbr1
           valid_lft forever preferred_lft forever
    8: tap100i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast                    master vmbr0 state UNKNOWN group default qlen 1000
        link/ether 7a:bf:30:01:ee:74 brd ff:ff:ff:ff:ff:ff
    9: tap100i1: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast                    master vmbr1 state UNKNOWN group default qlen 1000
        link/ether 3e:0f:8a:3e:0e:0a brd ff:ff:ff:ff:ff:ff
        inet 192.168.1.147/24 brd 192.168.1.255 scope global tap100i1
           valid_lft forever preferred_lft forever
    
    

    Code:
    auto lo
    iface lo inet loopback
    
    iface eno1 inet manual
    
    iface eno2 inet manual
    
    iface eno3 inet manual
    
    iface eno4 inet manual
    
    auto vmbr0
    iface vmbr0 inet manual
            bridge-ports eno1
            bridge-stp off
            bridge-fd 0
    
    auto vmbr1
    iface vmbr1 inet dhcp
            bridge-ports eno2
            bridge-stp off
            bridge-fd 0
    
    
     
    #1 rujoesmith, Feb 5, 2019
    Last edited: Feb 5, 2019
  2. rujoesmith

    rujoesmith New Member

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    Never mind, I had something bridged wrong it seems
     
  3. spirit

    spirit Well-Known Member

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    the tap interface is the device which map your guest vm virtual nic to the real work.

    for each vm nic, you have a tap interface (tap<vmid>i<netnum>).

    Then, the tag interface is plugged in vmbrX.
     
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