Use of two ethernet ports?

My 5 year old Mac Pro is noticeably slower downloading data over the net than is my 1 year old Mac Book Pro, even when they are conntected to the same switch in my home. I know of some systems where two links to the internet can be combined to gain greater throughput. Will the Mac Pro do this?
Adam

two links to the internet can be combined to gain greater throughput
Yes, it literally can, but it requires a specialty Router that supports the feature.
For all practical purposes, except in data center use, the answer is NO.
But that is not the answer at all. Most Internet connections are very slow compared to the Gigabit Ethernet of which your Mac Pro is capable. The connection to the Internet is not likely to be the problem.
First, use Network Utility to check the actual speed of your Ethernet port, and that the Ethernet port is the port being actually used, and that the number of errors reported is extremely trivial and not increasing over time.

Similar Messages

AS5350 Redundency (two ethernet ports) ?

Hiya,
The AS5350 has two ethernet ports. However, I am unable to find supporting information as to why ?
I assume it's for redundency. However, how do Cisco recomend to design VoIP redundency within this AS5350 ? i.e connect two ethernet ports to two different ethernet swicthes.
HSRP is not the correct tool for the job here.
.......... uhhmm, so what's the secret ?
Thanks for reading
Matt C

This can be used as redunant ports only ion case of failure of another. But this should not be confused with a switch port which will be working as a redundancy. Here u have to configure manulayy other port if one fails.

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)

I need to tell Print services to use the 2nd ethernet port

I need to tell Print services to use the 2nd ethernet port
Thanks in advance to anyone who can shed some light. My research has led me to a dead-end so far. Running 10.3.9 on my server. XServe Dual 2.3
I want to have File services and the various other duties pushed through one ethernet port, and print services on the other. I know there is probably a config file to make one simple edit, but I can not find it, or perhaps a "defaults" type command.
Also, where is this "command-line administration guide" that I keep running across on Apple's support?
Thanks in advance.
Matt

Similar issue here too. Is it the subnet? Basically, I'm having a problem printing to an AirportExpress-served printer. Our network looks like this:
(From Outside...>>>...to Inside)
(Public IP) DSL Modem
...(10.0.0.x) Airport Express -- HP DesignJet 100 USB -- Airtunes/stereo
...(10.0.0.x) NetGear Wireless Router
...(10.0.0.x nic 0) Mac OS X Server (192.168.0.x nic1)
......(192.168.0.x) Mac OS X client
......(192.168.0.x) Mac OS X client
......(192.168.0.x) Mac OS X client
The printer driver does not appear to be able to do IP printing, it assumes a direct USB connection. We can setup the OS X Server with the printer served by the Airport Express, as it is found via Bonjour, and then we share its queue via Server Admin. The problem is that the LAN clients cannot print to this server queue. The printer gets stopped at the server.
If we turn OFF the OS X Server's firewall, printing works from both the clients and obviously from the Server. I think my question is this: what ports or services need to be turned on in order for the clients to print? There is no clear checkbox for "Bonjour Printer Sharing", and I'm curious what ports this would open, and if it would be safe. I thought it would work because we're pushing the print job up through the firewall, but apparently some response needs to come back through the firewall, and that's what's not happening.
And to tack onto this, how could we also push iTunes to the Airport Express from the Clients? Assuming the music goes over different ports than the print jobs. ?
Thanks in advance for any help.

Pa-mc-8te1 can i use this a ethernet POrt how to configure it ...

pa-mc-8te1 can i use this a ethernet POrt how to configure it ...

Hi Venkat,
Please ask this question in routing/switching forum. As far as i know you can only configure pa-mc-8te1 as E1 or T1 ports. For more details please visit the below link.
http://www.cisco.com/c/en/us/td/docs/interfaces_modules/port_adapters/install_upgrade/multichannel_serial/8-port_multichannel_t1-ei_8pri_install_config/8port_t1/2738ovr.html
Regards,
Kanwal
Note: Please mark answers if they are helpful

How do I add an airport extreme to existing time capsule network and be able to use the router ethernet ports?

Good day everyone. I recently upgraded my airport extreme network by replacing the base station with a time capsule router. Since I now have an "extra" airport extreme router, I've set it up on the other side of the house to both extend the wireless range as well as use it's LAN ports for a home theater system in that location. Connecting the two routers was done via ethernet. It now appears that I need to do something "else" as the LAN ports on the now relocated airport extreme are nonfunctional. All devices are operating well for wireless and as a review, the modem is connected to the time capsule WAN which is connected to the airport extreme via ethernet cable via LAN to it's WAN port. What do I need to change on configurations to get the LAN ports functioning on the airport extreme? Thank you for any help.

Connecting the two routers was done via ethernet. It now appears that I need to do something "else" as the LAN ports on the now relocated airport extreme are nonfunctional.
With both base stations interconnected by Ethernet you have the basis for a "roaming" type network. If properly configured, both base stations' Ethernet ports would be enabled for wired clients.
The key configuration items for a roaming network are as follows:
All base stations used must be interconnected by Ethernet.
The "main" base station; the one connected to the Internet modem, must be configured to provide both NAT & DHCP services; all other base stations used must be configured as bridges (NAT & DHCP disabled.)
Each base station must have a unique base station name.
Each base station must use the same wireless security type and password.

Problem with two ethernet ports?

There is little consistency to this, but I'm wondering if anyone else has a similar problem. I upgraded to 10.6 on my Mac Pro. I have two ethernet connections which run concurrently in my network setup - one internally addressed, using a manual IP with DHCP, the other an external address with a static IP. On an inconsistent basis, opening pages in Safari will result in failures because I am apparently not connected to the internet, despite the fact that I am - Mail continues to work fine, server connections remain, etc., etc. The only way to get Safari to work again is to disable one of the ethernet ports. Reenabling it after I have successfully made a Safari connection does not then break the connection again - it keeps running for quite a while. The problem seems to become more apparent when I open a selected group of links into tabs - some will be successful, most will fail. Ideas?

Snoop Dogg thanks for the reply.
Port ONE was set to auto DNS. I did exactly as you suggested, I even tried a to do a manual ip address, etc but no luck. What finally worked is, I moved the port one cable to port two (which was empty) and bingo it worked.
It seems that snow leopard may have some issues with dual ethernet port machines, but why port two worked and port one didn't is beyond me. I will try to reverse it back to port one and see what happens. Fortunately I don't need two port at this point.
Cheers, Terry.

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?
Will I have to use another subnet-mask for the second port?
What is the trick?
Any help would be welcome.
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....
The subnet mask is intended to tell the TCP layer what part of the TCP/IP address the driver level should process. In the case of the standard setting 255.255.255.0, the driver only looks at packets that have the same configuration of the 24 most significant bit of the address. The 24 bits is indicated by the 255.255.255. The "255" is the decimal equivalent of an 8 bit pattern where all of the bits are set.
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

How can I use the USRP to record a signal using its two RX port simultaneously?

Hi.
I am trying to record a signal using two horn antenna. The reason I need two antenna is to cover the wide frequency range (DC-6GHz). one antenna is covering DC-300MHz and the other one covers 300MHz-6GHz. So I need to use two RX port of USRP at the same time to record the signal. I have two questions:
1. Does any USRP in the market capable of covering this range of frequency?
2. Is it possible to use both RX port at the same time to record signals as I described? If not, how can make that happen?
P.S. I have two NI2920 USRPs and two N210 USRPs in my lab.
Thanks in advance for your time.
Sam.
Solved!
Go to Solution.

Hi Sam,
To answer your first question the USRPs that you have cannot reach the frequency range that you want. There is not a USRP, to my knowledge, that can reach this range in one device.
Also note that you cannot use two RX sessions for two different ports at the same time using LabVIEW and the USRP driver. If you want to use both RX lines you will have to run one session with one line, end the session, and then start a different session for your second RX line.
Noah | Applications Engineer | National Instruments

Using printer's ethernet port as an access point

Hi there,
I have an HP LaserJet Pro 200 color MFP M276nw wirelessly connected to my network. I also have an HP LaserJet 5P, which was connected to my network / wireless router via an ethernet cable using a D-Link DP-301P+ print server. Don't judge...I love that old dinosaur and I use it exclusively for all black and white printing, and it has an envelope feeder. I moved and it's no longer possible for me to have my router in the same room as my printers.
Is it possible to use the HP LaserJet Pro 200 color MFP M276nw's ethernet port as an access point for the HP LaserJet 5P using the Link DP-301P+?
Thank you in advance for your help.

Hi,
Sounds very interesting, 3:30AM now (I'm watching FIFA games), I will talk with my Networks guys when they come to work and update later.
Regards.
Updated: Talking with the Network guy, he said this may noy work and his recommendation: use LAN over power.
BH
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Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

11S: can't use ax88179's Ethernet port

As previously discussed in Microsoft's forums, ax88179 is a portable Ethernet card needed for laptops that only have WIFI...like Yoga 11S.
When I download the latest driver Win 8.1 64-bit (both through setup.exe and the direct INF file) and install it, I get this (I use Yoga 11S' latest chipset):
Again, my system is Windows 8.1 64-bit in Yoga 11S:
Can anyone help out?

if all troubleshoot above didn't help, the ultimate thing is try this USB LAN to other machine which have Windows 8.1 to test (Your friend PC or collages) , if issue still persist i suggest you try also to contact Lenovo forum
https://forums.lenovo.com/t5/S-Series-ThinkPads-ThinkPad-Yoga/One-Onelink-dock-Thinkpad-Yoga-problem-solved/td-p/1424537
I found inside that thread there is one person approached himself as engineer from Asix (maybe)
Allan Chou
Technical Support Division
ASIX Electronics Corporation
TEL: 886-3-5799500 ext.228
FAX: 886-3-5799558
E-mail: [email protected]
http://www.asix.com.tw/
Hope this information will help, you are not alone, I checked there is a lot of issue regarding this Asix ax88179 with Windows 8.1 which not solved yet
Anyway, again let us know if there is any update

[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:
Computer --> eth1 --> Aztech Modem/Router
eth1 is a static configuration. The debian /etc/network/interfaces file looks like
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)
However when I boot this is what I see
# ifconfig
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
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:24 errors:0 dropped:0 overruns:0 frame:0
TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
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

Serversetup -sethostname with two ethernet ports

I have added a 4 port gigabit card with link aggregate to the headnode of our cluster. I have set up this aggregate port on a second subnet (192.168.2.1). I have the nodes resolving to my head node through their second port to this gigabit card. I can ssh into either port now on any given node (e.g., en0 and en1).
For each node, I have the hostname for the first port (en0) set as nodexx.cluster.private and for the second port (en1), which I've just added, pnodexx.cluster.private. When I ssh into the node via en0 I get the prompt:
node02:~ admin$
When I ssh to the node via en1, I get the prompt:
node02:~ admin$
But I would expect to get:
pnode02:~ admin$
I was going to ssh into the node through en1 and do a serversetup -sethostname pnode02 but I'm afraid this will reset the hostname for en0, which I do not want to screw with.
Will this work as expected if I do the serversetup -sethostname?
Xserve G5 Dual 2GHz Mac OS X (10.4.6)

Your machine will only have one hostname, regardless of the number of interfaces it has. If you try to change the hostname to pnode2, that's what it will be.

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.
http://manuals.info.apple.com/en_US/airport_express_80211n_2nd_gen_setup_guide.p df

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.

Use of two ethernet ports?

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