Bonding Two Ethernet Ports to act as One

I am having problems bonding two ethernet ports on my G4 Xserver (10.4.4). The Mac OS X Server Command-Line Administration 10.4 manual gives instructions for doing this a number of ways.
I tried <ifconfig en0 bonddev en1>; it did not work.
The manual suggested using the <serversetup> commmand which does not exist on my server.
I eventually used <sudo networksetup -createBond BondedEnet "Built-in Ethernet" "PCI Ethernet Slot 1"> which looked like it was working. However, it seem to lose the bond after a reboot of the server.
Has anyone had any success with bonding and have some instructions on how to initiate it properly?
G4 Xserver Mac OS X (10.4.4)

I've found bonding to be reliable when set via the
GUI, but I've yet to find a stable command line
method.
Note that any ifconfig commands would be transient,
and lost at the next reboot. In any case your syntax
is incorrect. It should be:
ifconfig bond0 bonddev
en1
in other words, add device en1 to the existing bonded
interface bond0. You're passing in a physical
interface as the first parameter instead of the
virtual bonded interface.
The networksetup command should work, and should be
persistent. It's not clear why it isn't working.
If you have ARD or a monitor on this box I'd just go
ahead and do it via the GUI. Maybe not the answer you
wanted, but it works for me.
If I don't have an existing bond0, do I simply use same line above but with en0 to create it.
For example: ifconfig bond0 bonddev en0
And is there anything else that would require tweaking after the bond is setup.
G4 Xserver Mac OS X (10.4.4)

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Two Ethernet-ports in Quad G5

Hello all,
each of the two built in Ethernet-ports works fine as long as I only use this one.
But if I try to use both at the same time (half of the net connected to each of them; each to one switch; separat IP-numbers for each one), the whole net does not work for me anymore.
What goes wrong here?
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What is the trick?
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Thanks,
Hans
Quad G5 Mac OS X (10.4.4) mixed net (Macs+PCs)
Quad G5 Mac OS X (10.4.4)
Quad G5 Mac OS X (10.4.4)

So are you good to go?
The following is subject to correction by anyone who knows better.
From what I understand....
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The mask is intended as a way of pre-screening packets.
So looking at your address indicates that a mask of 255.255.254.0 is only screen the top 23 bits of the address. Since 10.21.58 differs from 10.21.4.242 in the third 8 bit sub-address in bits 6,5,4,3,1 (zero based) a subnet of 255.255.X.0 where X = 192 193 or 0 would work.
All of the above is based on my very old recollection of how the subnet mask was to be used. I can not be certain this is correct and if switch gear supports masks other than 255.255.255.0.
Just trying to help,
Ben
Message Edited by Ben on 03-15-2007 05:26 PM
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Use of two ethernet ports?

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Adam

two links to the internet can be combined to gain greater throughput
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Bonding two ethernet cards to two switches

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IEEE 802.3ad is of on the switches, maybee turn it on just to see if it changes anything?
Switch is a cisco with IEEE 802.3ad support but turned of.

I've found bonding to be reliable when set via the
GUI, but I've yet to find a stable command line
method.
Note that any ifconfig commands would be transient,
and lost at the next reboot. In any case your syntax
is incorrect. It should be:
ifconfig bond0 bonddev
en1
in other words, add device en1 to the existing bonded
interface bond0. You're passing in a physical
interface as the first parameter instead of the
virtual bonded interface.
The networksetup command should work, and should be
persistent. It's not clear why it isn't working.
If you have ARD or a monitor on this box I'd just go
ahead and do it via the GUI. Maybe not the answer you
wanted, but it works for me.
If I don't have an existing bond0, do I simply use same line above but with en0 to create it.
For example: ifconfig bond0 bonddev en0
And is there anything else that would require tweaking after the bond is setup.
G4 Xserver Mac OS X (10.4.4)

Two disk drives to act as one?

Hello,
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Serversetup -sethostname with two ethernet ports

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Will this work as expected if I do the serversetup -sethostname?
Xserve G5 Dual 2GHz Mac OS X (10.4.6)

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[Solved] Two ethernet ports (dhcp and static)

For various reasons I connect to the internet as follows:
Computer --> eth0 --> Linksys Router --> Aztech Modem/Router --> Internet
From time to time I need to access the Aztech. Usually I change the eth0 cable connecting to the Linksys to the Aztech. And restart networking. Access the Aztech. Then change the cable from Aztech to Linksys. Restart network.
In Debian (to avoid this cable changing), what I did was to also have a cable as follows:
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auto eth0
iface eth0 inet dhcp
auto eth1
iface eth1 inet static
address 10.0.0.3
netmask 255.255.255.0
So in Debian I plug a cable into eth1 (from the Aztech). I can then access the Aztech without it interfering with resolv.conf so I can still browse the internet via eth0.
I have tried the following in ArchLinux:
HOSTNAME="milomak-arch"
eth0="dhcp"
INTERFACES=(eth0)
eth1="eth1 10.0.0.1 netmask 255.255.255.0"
INTERFACES=(eth1)
gateway="default gw 192.168.1.1 10.0.02"
ROUTES=(!gateway)
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eth1 Link encap:Ethernet HWaddr 00:24:8C:52:DC:5F
inet addr:10.0.0.1 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::224:8cff:fe52:dc5f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:468 (468.0 b)
Interrupt:17
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
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collisions:0 txqueuelen:0
RX bytes:1280 (1.2 Kb) TX bytes:1280 (1.2 Kb)
what am i missing?
Last edited by milomak (2009-11-21 10:35:16)

Put both interfaces in the INTERFACES= array.
/etc/rc.conf includes this detail, with a slightly different wording i.e.
# Interfaces to start at boot-up (in this order)
# Declare each interface then list in INTERFACES

Second Generation Airport Express (MC414LL/A with two ethernet ports))

The link http://manuals.info.apple.com/en_US/AirPort_Express_Setup_Guide.pdf (page 7) still points to the first generation Airport Express (802.11n - Part FB321LL/A).
Can anyone provide a working link to the User Manual?
Is WDS supported on this dual mode device?

The new manual is now available.
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Is my right Ethernet Port Broken?

05Apr2014
I bought a new Mac Pro with all the features. There are two Ethernet ports on the bottom of the periferal ports.
I am able to connect with an Airport Extreme (Generation 3) wiht the left port. The connection does not work on the right ethernet port.
Is the right ethernet port broken? I only had the computer for a few weeks.
Also, I can not see the Airport Extreme (Gen 3, March 2009) when I use the Airport Utility.   Is that model of Airport Extreme compatible wiht the new late 2013 Mac Pros?
I prior to getting the new Mac Pro, I had a 2007 Imac connected to a mac laptop.   I had both computers connected to the Airport Extreme using ethernet cables.
Now I use the Imac connected wirelessly to the Airport Extreme and the same laptop plus the mac pro are connected using ethernet cable. However, I can connect the Imac and laptop like before, but I can not connect any computer wiht the Mac Pro.
I also installed McAfee Internet Security sotware which maybe causing my connection problems.
I configured the network years ago and forgot how to connect computers together.
Does the right side ethernet port need to be repaired?   Is the Airport Uthility software compataible with new Mac Pro?
I'd appreciate any help wth these issues.
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06Apr2014
RE: The two ethernet ports:
     I only need one port. It is connected to an Airport Extreme (which has a laptop connected with an ethernet cable).
     The port on the right is closer to the Airport Extreme, but it does not work.   This is meerly a frustration that a port to a brand new machine (Mac Pro).
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      My next goal is to network the three computers, which I used to be able to do. I have a Airport Dock, connected to a DVD player and two Tivo boxes. I lost the connctivity of the Airport Dock, so my Tivoes are not working right.
       Yesterday was a frustrating day! I am certainly not a trained network manager.   I don't know what I did to loose the connections and I compleltly forgotten how to get the connectivity back.
Thank you for your help!   I want my brand new Mac Pro to work perfectly!   I forgot how furstraiting it was years ago to confiigure computers.
Regards,
     chhenden

How do you make use of the 2nd Ethernet port on the Mac Pro?

My Mac Pro's ethernet port connects it to the local network and the internet.
Under what circumstances would I make use of the 2nd port?
Are there any settings I'd have to set up in system preferences to make sure one is used for some things while the other is used for different things?
I'm asking because we might be making some changes to our network. We have a printer with a Fiery RIP and I'm pretty much the only one who prints to it. I was wondering if we could/should set up a direct, dedicated connection so that network traffic won't bog down print jobs.

The main use for that port today is to create a subnetwork for Internet Sharing. Software inside the Mac can act as a Router and provides new DHCP Addresses for the subnetwork. In general, the devices on the subnetwork would be inaccessible from anywhere else, due to Network Address Translation.
If you are concerned about heavy network traffic, consider upgrading your Switches (not Routers) to Gigabit Ethernet speeds and using Jumbo frames. (Routers are not involved in peer-to-peer transfers such as Printing when no Address Translation is involved.)
If you have an Industrial Router, you can combine the two Ethernet ports into one composite link for faster-than-Gigabit effective speeds, but it requires a special Router not generally available.

How to add Ethernet ports to an Airport Extreme Base Station?

I have successfully connected an HP Office Jet 6310 to the Airport Extreme Base Station, after downloading the latest software from HP. It is printing wirelessly, and it is great so far.
The only problem is that the cable modem connected to ADSL has only one Ethernet port, and the Airport Extreme Base Station also has one Ethernet port. However, I need one more port to connect a phone (Vonage Telephone Adapter = VTA).
What is the easiest way to achieve this? I saw several other messages discussing hubs and routers, but the answer is not clear yet. If I purchase an additional router, should it be connected between the cable modem and the Airport Extreme Base Station, or the other way round?
Any help or advice would be appreciated!
Thank you in advance for your time.
MacBook Pro with 1.83 GHz Intel Core Duo Mac OS X (10.4.7)

One final vital piece of information, which should be my conclusion on this topic.
Following the advice received, I purchased a Switch from Linksys. Since the device didn't work for my purpose (dividing the Ethernet connexion into an Ethernet line for the HP printer and the Vonage phone), I called the Linksys support.
I was told that what I needed was not a switch, but a router. I thus had to get reimbursed for the switch and hunt for the proper router.
Finally, today, I have been able to find the item corresponding to my needs:
A Belkin Wireless G Router F5D7230-4
It costs less than 50 US$ and has all the necessary Ethernet ports. The setup is very simple, and I got it operational within a couple of minutes, despite some small problems getting the setup Wizard to work. It is Mac OS X compatible.
Thus, at the end, I have got the HP 6310 Office printer and the Vonage VTA phone working together, with a robust Wireless network including WPA security. I would recommend this type of setting.
The only trouble is that the AirMac Extreme Base Station has become completely useless! I will perhaps keep it as a souvenir, or as a decoration in the living room... This wouldn't have happened if the creators of this nice object, which is extremely expensive for what it provides, would have thought of including at least two Ethernet ports!
The unexpected reply to my query could thus be ironically formulated by saying: "replace the Airport Extreme Base Station with a cheaper an more efficient device." Sorry for that!
With my best regards to those who took the trouble to read this thread to the end.
Yours, Hotaru

Looking for an Access Point with 2 Ethernet ports

Hi,
I am looking for an AP with two ethernet ports. Is there any model of Cisco is available with 2 ethernet ports?
Regards,
Noman

pros:
If an access swich/switch port failed then AP still forward traffic through other switch once power restored through other port.
when PoE failed on its connected switch, it may still work via other port.
Having two ethernet port on AP may require to talk to different switches/stack to achieve AP port redundancy through lag or stateful switch over when cable/switch/AP port failure.
if one physical port become bad on AP, it can be still used with other.
(However, AP/physical port failure can be takencare at RF level using self healing.)
cons:
require additional switch and its config maintanece
currently, AP doesn't require 2 physical port for data transfer perspective.
Require x2 PoE ports.
Additional port increases the cost on AP.
it is possible cisco may make it in future.

Bonding Two Ethernet Ports to act as One

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