+
+Linux Bond
+~~~~~~~~~~
+
+Bonding (also called NIC teaming or Link Aggregation) is a technique
+for binding multiple NIC's to a single network device. It is possible
+to achieve different goals, like make the network fault-tolerant,
+increase the performance or both together.
+
+High-speed hardware like Fibre Channel and the associated switching
+hardware can be quite expensive. By doing link aggregation, two NICs
+can appear as one logical interface, resulting in double speed. This
+is a native Linux kernel feature that is supported by most
+switches. If your nodes have multiple Ethernet ports, you can
+distribute your points of failure by running network cables to
+different switches and the bonded connection will failover to one
+cable or the other in case of network trouble.
+
+Aggregated links can improve live-migration delays and improve the
+speed of replication of data between Proxmox VE Cluster nodes.
+
+There are 7 modes for bonding:
+
+* *Round-robin (balance-rr):* Transmit network packets in sequential
+order from the first available network interface (NIC) slave through
+the last. This mode provides load balancing and fault tolerance.
+
+* *Active-backup (active-backup):* Only one NIC slave in the bond is
+active. A different slave becomes active if, and only if, the active
+slave fails. The single logical bonded interface's MAC address is
+externally visible on only one NIC (port) to avoid distortion in the
+network switch. This mode provides fault tolerance.
+
+* *XOR (balance-xor):* Transmit network packets based on [(source MAC
+address XOR'd with destination MAC address) modulo NIC slave
+count]. This selects the same NIC slave for each destination MAC
+address. This mode provides load balancing and fault tolerance.
+
+* *Broadcast (broadcast):* Transmit network packets on all slave
+network interfaces. This mode provides fault tolerance.
+
+* *IEEE 802.3ad Dynamic link aggregation (802.3ad)(LACP):* Creates
+aggregation groups that share the same speed and duplex
+settings. Utilizes all slave network interfaces in the active
+aggregator group according to the 802.3ad specification.
+
+* *Adaptive transmit load balancing (balance-tlb):* Linux bonding
+driver mode that does not require any special network-switch
+support. The outgoing network packet traffic is distributed according
+to the current load (computed relative to the speed) on each network
+interface slave. Incoming traffic is received by one currently
+designated slave network interface. If this receiving slave fails,
+another slave takes over the MAC address of the failed receiving
+slave.
+
+* *Adaptive load balancing (balanceIEEE 802.3ad Dynamic link
+aggregation (802.3ad)(LACP):-alb):* Includes balance-tlb plus receive
+load balancing (rlb) for IPV4 traffic, and does not require any
+special network switch support. The receive load balancing is achieved
+by ARP negotiation. The bonding driver intercepts the ARP Replies sent
+by the local system on their way out and overwrites the source
+hardware address with the unique hardware address of one of the NIC
+slaves in the single logical bonded interface such that different
+network-peers use different MAC addresses for their network packet
+traffic.
+
+For the most setups the active-backup are the best choice or if your
+switch support LACP "IEEE 802.3ad" this mode should be preferred.
+
+The following bond configuration can be used as distributed/shared
+storage network. The benefit would be that you get more speed and the
+network will be fault-tolerant.
+
+.Example: Use bond with fixed IP address
+----
+auto lo
+iface lo inet loopback
+
+iface eth1 inet manual
+
+iface eth2 inet manual
+
+auto bond0
+iface bond0 inet static
+ slaves eth1 eth2
+ address 192.168.1.2
+ netmask 255.255.255.0
+ bond_miimon 100
+ bond_mode 802.3ad
+ bond_xmit_hash_policy layer2+3
+
+auto vmbr0
+iface vmbr0 inet static
+ address 10.10.10.2
+ netmask 255.255.255.0
+ gateway 10.10.10.1
+ bridge_ports eth0
+ bridge_stp off
+ bridge_fd 0
+
+----
+
+
+Another possibility it to use the bond directly as bridge port.
+This can be used to make the guest network fault-tolerant.
+
+.Example: Use a bond as bridge port
+----
+auto lo
+iface lo inet loopback
+
+iface eth1 inet manual
+
+iface eth2 inet manual
+
+auto bond0
+iface bond0 inet maunal
+ slaves eth1 eth2
+ bond_miimon 100
+ bond_mode 802.3ad
+ bond_xmit_hash_policy layer2+3
+
+auto vmbr0
+iface vmbr0 inet static
+ address 10.10.10.2
+ netmask 255.255.255.0
+ gateway 10.10.10.1
+ bridge_ports bond0
+ bridge_stp off
+ bridge_fd 0
+
+----
+
projects / pve-docs.git / blobdiff