Empty node network usage graph

[Andrey Dudin]

I use aggregation of interfaces.

int1 + int2 => aggi
ext1 + ext2 => agge

Why proxmox can't show network usage graph?

4: int1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 8964 qdisc mq master aggi state UP group default qlen 1000
    link/ether a0:36:9f:6c:61:b0 brd ff:ff:ff:ff:ff:ff
5: ext1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master agge state UP group default qlen 1000
    link/ether a0:36:9f:6c:61:b2 brd ff:ff:ff:ff:ff:ff
6: int2: <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP> mtu 8964 qdisc mq master aggi state DOWN group default qlen 1000
    link/ether a0:36:9f:6c:61:b0 brd ff:ff:ff:ff:ff:ff
7: ext2: <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP> mtu 1500 qdisc mq master agge state DOWN group default qlen 1000
9: aggi: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 8964 qdisc noqueue master vmbr1 state UP group default qlen 1000
    link/ether a0:36:9f:6c:61:b0 brd ff:ff:ff:ff:ff:ff
10: agge: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether a0:36:9f:6c:61:b2 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::a236:9fff:fe6c:61b2/64 scope link
       valid_lft forever preferred_lft forever
11: vmbr1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8964 qdisc noqueue state UP group default qlen 1000
    link/ether a0:36:9f:6c:61:b0 brd ff:ff:ff:ff:ff:ff
    inet 10.34.0.2/16 brd 10.77.255.255 scope global vmbr1
       valid_lft forever preferred_lft forever
    inet6 fe80::a236:9fff:fe6c:61b0/64 scope link
       valid_lft forever preferred_lft forever

 pveversion -v
proxmox-ve: 5.3-1 (running kernel: 4.15.18-10-pve)
pve-manager: 5.3-9 (running version: 5.3-9/ba817b29)
pve-kernel-4.15: 5.3-1
pve-kernel-4.15.18-10-pve: 4.15.18-32
corosync: 2.4.4-pve1
criu: 2.11.1-1~bpo90
glusterfs-client: 3.8.8-1
ksm-control-daemon: 1.2-2
libjs-extjs: 6.0.1-2
libpve-access-control: 5.1-3
libpve-apiclient-perl: 2.0-5
libpve-common-perl: 5.0-45
libpve-guest-common-perl: 2.0-20
libpve-http-server-perl: 2.0-11
libpve-storage-perl: 5.0-37
libqb0: 1.0.3-1~bpo9
lvm2: 2.02.168-pve6
lxc-pve: 3.1.0-2
lxcfs: 3.0.2-2
novnc-pve: 1.0.0-2
proxmox-widget-toolkit: 1.0-22
pve-cluster: 5.0-33
pve-container: 2.0-34
pve-docs: 5.3-2
pve-edk2-firmware: 1.20181023-1
pve-firewall: 3.0-17
pve-firmware: 2.0-6
pve-ha-manager: 2.0-6
pve-i18n: 1.0-9
pve-libspice-server1: 0.14.1-2
pve-qemu-kvm: 2.12.1-1
pve-xtermjs: 3.10.1-1
qemu-server: 5.0-46
smartmontools: 6.5+svn4324-1
spiceterm: 3.0-5
vncterm: 1.5-3
zfsutils-linux: 0.7.12-pve1~bpo1