TAP interface created automatically

rujoesmith

New Member
Sep 7, 2018
3
0
1
26
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
 
Last edited:

spirit

Well-Known Member
Apr 2, 2010
3,522
156
63
www.odiso.com
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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