Tag: network

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Update CentOS kernel for deploy Google BBR

BBR (Bottleneck Bandwidth and RTT) is a new congestion control algorithm which is contributed to the Linux kernel TCP stack by Google. With BBR in place, a Linux server can get significantly increased throughput and reduced latency for connections. Besides, it’s easy to deploy BBR because this algorithm requires only updates on the sender side, not in the network or on the receiver side.

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Ubuntu 16.04+ network 802.3ad LACP bonding

In juniper switch set aggregated Ethernet link mode as active

set aeX aggregated-ether-options lacp active

Edit file /etc/network/interfaces

# The loopback network interface
auto lo
iface lo inet loopback
dns-nameservers 64.6.64.6 8.8.8.8

# eth0 slave interface
iface eth0 inet manual

# eth1 slave interface
iface eth1 inet manual

# bond0 trunk interface
auto bond0
iface bond0 inet manual
    slaves eth0 eth1
    bond-mode 4
    bond-miimon 100
    bond-downdelay 200
    bond-updelay 200
    bond-lacp-rate 1
    bond-xmit-hash-policy layer3+4
    #post-up ifup eth0 eth1

# bond0.2 vlan 2 interface
auto bond0.2
iface bond0.2 inet static
    vlan-raw-device bond0
    address 192.168.1.10
    gateway 192.168.1.1
    netmask 255.255.255.0
    pre-down ip -4 addr flush dev $IFACE

# bond0.3 vlan 3 interface
auto bond0.3
iface bond0.3 inet static
    vlan-raw-device bond0
    address 172.16.0.10
    gateway 172.16.0.1
    netmask 255.255.255.0
    pre-down ip -4 addr flush dev $IFACE

Then restart networking service

service networking restart && ifdown bond0 && ifup bond0