adding network interface

A

almiller

Member
Dec 1, 2020
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I inherited an old Dell with pve-manager/7.2-7 installed.
The machine has 4 physical interfaces and 1 port is configured for 172.16.1.0/24
I deployed some VMs in the same subnet and everything is fine.

But now I'd like to use another physical interface for a new subnet 172.17.1.0/24
so that I can deploy a k8s cluster there.

I don't understand how the the interfaces and the networking works.
I see 4 enoX itnerfaces and 2 vmbrX interfaces.

Bash: 
root@pve ~ # ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr0 state UP group default qlen 1000
    link/ether 00:26:b9:2c:82:5b brd ff:ff:ff:ff:ff:ff
    altname enp1s0f0
3: eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master vmbr1 state DOWN group default qlen 1000
    link/ether 00:26:b9:2c:82:5d brd ff:ff:ff:ff:ff:ff
    altname enp1s0f1
4: eno3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:26:b9:2c:82:5f brd ff:ff:ff:ff:ff:ff
    altname enp2s0f0
5: eno4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:26:b9:2c:82:61 brd ff:ff:ff:ff:ff:ff
    altname enp2s0f1
6: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 16:4e:1c:59:10:bd brd ff:ff:ff:ff:ff:ff
    inet 172.16.1.101/24 brd 172.16.1.255 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fde7:9611:2b18:d2b8:144e:1cff:fe59:10bd/64 scope global dynamic mngtmpaddr
       valid_lft 1548sec preferred_lft 1548sec
    inet6 fe80::144e:1cff:fe59:10bd/64 scope link
       valid_lft forever preferred_lft forever
7: vmbr1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:85:71:a8:40:ed brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.1/24 brd 192.168.1.255 scope global vmbr1
       valid_lft forever preferred_lft forever
 
Nevermind, I found the networking docs and changed my /etc/network/interfaces to

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 static
    address 172.16.1.101/24
    gateway 172.16.1.1
    bridge-ports eno1
    bridge-stp off
    bridge-fd 0
auto vmbr1
iface vmbr1 inet static
    address 172.17.1.100/24
    gateway 172.17.1.1
    bridge-ports eno2
    bridge-stp off
    bridge-fd 0

Now I see this:

Code: 
root@pve ~ # ip route show
default via 172.16.1.1 dev vmbr0 proto kernel onlink
172.16.1.0/24 dev vmbr0 proto kernel scope link src 172.16.1.101
172.17.1.0/24 dev vmbr1 proto kernel scope link src 172.17.1.100 linkdown

root@pve ~ # ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr0 state UP group default qlen 1000
    link/ether 00:26:b9:2c:82:5b brd ff:ff:ff:ff:ff:ff
    altname enp1s0f0
3: eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master vmbr1 state DOWN group default qlen 1000
    link/ether 00:26:b9:2c:82:5d brd ff:ff:ff:ff:ff:ff
    altname enp1s0f1
4: eno3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:26:b9:2c:82:5f brd ff:ff:ff:ff:ff:ff
    altname enp2s0f0
5: eno4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:26:b9:2c:82:61 brd ff:ff:ff:ff:ff:ff
    altname enp2s0f1
6: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:26:b9:2c:82:5b brd ff:ff:ff:ff:ff:ff
    inet 172.16.1.101/24 brd 172.16.1.255 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::226:b9ff:fe2c:825b/64 scope link
       valid_lft forever preferred_lft forever
7: vmbr1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 00:26:b9:2c:82:5d brd ff:ff:ff:ff:ff:ff
    inet 172.17.1.100/24 scope global vmbr1
       valid_lft forever preferred_lft forever
 
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