SDN - incorrect MTU

[kocifi]

Hello, I'm testing SDN and I'm stuck on incorrect MTU

Zone VLAN:
ID - Bridge - MTU
Cluster1 - vmbr1 - 9000

vmbr1 is based on bond0 (enp3s0f0 enp3s0f1) - everything under vmbr1 have MTU 9000 (and it's working correctly)

Vnets:
Name - Alias - Zone - Tag
vnet10 - Sync GWs - Cluster1 - 10

/etc/network/interfaces.d/sdn:

auto ln_vnet10
iface ln_vnet10
        link-type veth
        veth-peer-name pr_vnet10

auto pr_vnet10
iface pr_vnet10
        link-type veth
        veth-peer-name ln_vnet10

auto vmbr1v10
iface vmbr1v10
        bridge_ports  bond0.10 pr_vnet10
        bridge_stp off
        bridge_fd 0

auto vnet10
iface vnet10
        bridge_ports ln_vnet10
        bridge_stp off
        bridge_fd 0
        mtu 9000
        alias Sync GWs

ip a:

14: vmbr1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 qdisc noqueue state UP group default qlen 1000
    link/ether b4:b5:2f:a4:26:d0 brd ff:ff:ff:ff:ff:ff
    inet 172.16.0.10/24 scope global vmbr1
       valid_lft forever preferred_lft forever
    inet6 fe80::b6b5:2fff:fea4:26d0/64 scope link
       valid_lft forever preferred_lft forever
94: vnet10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 qdisc noqueue state UP group default qlen 1000
    link/ether 82:94:f5:12:b3:92 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::8094:f5ff:fe12:b392/64 scope link
       valid_lft forever preferred_lft forever
113: ln_vnet10@pr_vnet10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vnet10 state UP group default qlen 1000
    link/ether 82:94:f5:12:b3:92 brd ff:ff:ff:ff:ff:ff
114: pr_vnet10@ln_vnet10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr1v10 state UP group default qlen 1000
    link/ether 92:bc:a4:fb:bf:f3 brd ff:ff:ff:ff:ff:ff
115: bond0.10@bond0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 qdisc noqueue master vmbr1v10 state UP group default qlen 1000
    link/ether b4:b5:2f:a4:26:d0 brd ff:ff:ff:ff:ff:ff
116: vmbr1v10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether b4:b5:2f:a4:26:d0 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::b6b5:2fff:fea4:26d0/64 scope link
       valid_lft forever preferred_lft forever

ping -M do -s 8972 172.16.0.2 (to test mtu 9000 on vmbr1)

PING 172.16.0.2 (172.16.0.2) 8972(9000) bytes of data.
8980 bytes from 172.16.0.2: icmp_seq=1 ttl=64 time=0.435 ms
8980 bytes from 172.16.0.2: icmp_seq=2 ttl=64 time=0.302 ms
8980 bytes from 172.16.0.2: icmp_seq=3 ttl=64 time=0.297 ms

 

[spirit]

Il try to fix that next week. For now, i think you could try to enable vlan aware on vmbr1. (+reboot +regenrate sdn config). The config is a little bit different

 

[kocifi]

Workaround with vlan aware works

 

[spirit]

Hi,

here a fixed version, can you test it ?

wget https://mutulin1.odiso.net/libpve-network-perl_0.7.1_all.deb
dpkg -i libpve-network-perl_0.7.1_all.deb

 

[kocifi]

Everything looks good, ping from VMs (8972 data bytes) works correctly.

 

[spirit]

Everything looks good, ping from VMs (8972 data bytes) works correctly.

ok thanks !

I'll include the fix for the next package release.