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--- wiki:centos_bonding_interfaces [2017/06/26 11:40] – [Management Interface Bonding] walkeradmin
+++ wiki:centos_bonding_interfaces [2023/03/09 22:35] (current) – external edit 127.0.0.1
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 ===== Introduction =====
 For network redundancy, we can bond interface pairs on the G6/G7 servers. For this example I am using CentOS 6.x, so luckily still have the ethx naming convention.
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+So <color #ed1c24>ifcfg-eth0</color> and <color #ed1c24>ifcfg-eth1</color> don't contain any address information, but they both contain the entry <color #ed1c24>MASTER=bond0</color> to tie them to a particular bond file.
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-So ifcfg-eth0 and ifcfg-eth1 don't contain any address information, but they both contain the entry MASTER=bond0 to tie them to a particular bond file.
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-\\
+<color #22b14c>ifcfg-bond0</color> contains all of the addressing information for the two interfaces that are bonded (<color #22b14c>ifcfg-eth0 and ifcfg-eth1</color>)
-ifcfg-bond0 contains all of the addressing information for the two interfaces that are bonded (ifcfg-eth0 and ifcfg-eth1)
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 Reboot the server, and you should be able to ping the management address (192.168.27.100 in this case) and if you only unplug one interface at a time, the pings should continue (you might miss one or two pings during transition).
+\\
+\\
+<color #00a2e8>miimon</color> specifies the MII <color #00a2e8>link monitoring frequency in milliseconds</color>. This determines how often the link state of each slave is inspected for link failures. A value of zero disables MII link monitoring. A value of 100 is a good starting point.
+\\
+\\
+----
+===== Ingress/Egress Interface Bonding =====
+\\
+For bonding the ingress/egress interfaces, we will require four files. I am making the assumption that we are using the second two interfaces (eth2 and eth3) for Egress, and that this is the second bond on this device (so bond1, bond0 being for Management):
+<file>
+ifcfg-eth2
+ifcfg-eth3
+ifcfg-bond1
+route-bond1
+</file>
+So <color #ed1c24>ifcfg-eth2</color> and <color #ed1c24>ifcfg-eth3</color> are the interface configuration files, again they contain no addressing:
+\\
+==== ifcfg-eth2 ====
+<file>
+DEVICE=eth2
+HWADDR=00:1E:67:F2:63:12
+TYPE=Ethernet
+UUID=6530a0c3-592d-44d0-8418-b6795818cf55
+ONBOOT=yes
+MASTER=bond1
+SLAVE=yes
+</file>
+==== ifcfg-eth3 ====
+<file>
+DEVICE=eth3
+HWADDR=00:1E:67:F2:63:13
+TYPE=Ethernet
+UUID=13c99bfe-03f9-44c8-8a91-277dbd2c192b
+ONBOOT=yes
+MASTER=bond1
+SLAVE=yes
+</file>
+\\
+Now we have the bond file (<color #22b14c>ifcfg-bond1</color>) that contains the IP Addressing
+\\
+==== ifcfg-bond1 ====
+<file>
+DEVICE=bond1
+ONBOOT=yes
+BOOTPROTO=static
+USERCTL=no
+BONDING_OPTS="mode=1 miimon=100"
+IPADDR=11.0.100.1
+NETMASK=255.0.0.0
+</file>
+\\
+Finally we have a routing file (<color #00a2e8>route-bond1</color>) that is for the multicast routing (so we know our incoming multicast will be available on this interface/bond)
+\\
+==== route-bond1 ====
+<file>
+ADDRESS0=239.0.0.0
+NETMASK0=255.0.0.0
+GATEWAY0=11.0.100.1
+</file>
+\\
+\\
+<color #ed1c24>NOTE!</color> the routes must start from <color #ed1c24>0</color> (ADDRESS<color #ed1c24>0</color>, NETMASK<color #ed1c24>0</color>, GATEWAY<color #ed1c24>0</color>) and if there is more than one route the numbering must be contiguous.
+\\
+\\
+----
+==== Route ====
+Below we can see the route information with the bondx entries in the right hand column.
+\\
+<file>
+Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
+.168.27.0    *               255.255.255.0   U     0      0        0 bond0
+link-local      *               255.255.0.0     U     1004   0        0 eth4
+link-local      *               255.255.0.0     U     1005   0        0 eth5
+link-local      *               255.255.0.0     U     1008   0        0 eth7
+link-local      *               255.255.0.0     U     1009   0        0 eth6
+link-local      *               255.255.0.0     U     1010   0        0 bond0
+link-local      *               255.255.0.0     U     1011   0        0 bond1
+.0.0.0       11.0.100.1      255.0.0.0       UG    0      0        0 bond1
+.0.0.0        *               255.0.0.0       U     0      0        0 eth4
+.0.0.0        *               255.0.0.0       U     0      0        0 bond1
+default         192.168.27.254  0.0.0.0         UG    0      0        0 bond0
+</file>
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