Help to use twin 1 gig lan ports

[Jim Christiansen]

I've just purchased a server board with two 1 gig lan ports.  I would like 
to set one up for inbound traffic and  the other for outbound traffic.  Can 
this be done??

If this isn't possible is there another way to use these two ports to 
enhance network through-put??

Thanks,  Jim

[Joel Jaeggli]

On Tue, 27 Sep 2005, Jim Christiansen wrote:
> I've just purchased a server board with two 1 gig lan ports.  I would like to 
> set one up for inbound traffic and  the other for outbound traffic.  Can this 
> be done??
>
> If this isn't possible is there another way to use these two ports to enhance 
> network through-put??

If you have a managed ethernet-switch you can bond or trunk the two ports 
together.
> Thanks,  Jim

[Robin Mordasiewicz]

On Tue, 27 Sep 2005, Jim Christiansen wrote:
> I've just purchased a server board with two 1 gig lan ports.  I would like to 
> set one up for inbound traffic and  the other for outbound traffic.  Can this 
> be done??
>
> If this isn't possible is there another way to use these two ports to enhance 
> network through-put??

Your switch must support trunking of some sort. Most Cisco, or SMC

you want to bond the interfaces.
The files you need to edit are
/etc/sysconfig/network-scripts/ifcfg-bond0
/etc/sysconfig/network-scripts/ifcfg-eth0
/etc/sysconfig/network-scripts/ifcfg-eth1
/etc/modprobe.conf

[root@smtcorav02 ~ ]# cat /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
ONBOOT=yes
IPADDR=10.10.4.247
BROADCAST=10.10.4.255
NETMASK=255.255.255.0
NETWORK=10.10.4.0
GATEWAY=10.10.4.254
BOOTPROTO=none
USERCTL=no
BONDING_SLAVE0="eth0"
BONDING_SLAVE1="eth1"
[root@smtcorav02 ~ ]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=none
ONBOOT=no
TYPE=Ethernet
MASTER=bond0
SLAVE=yes
USERCTL=no
[root@smtcorav02 ~ ]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
BOOTPROTO=none
ONBOOT=no
TYPE=Ethernet
MASTER=bond0
SLAVE=yes
USERCTL=no
[root@smtcorav02 ~ ]# cat /etc/modprobe.conf
alias bond0 bonding
options bonding miimon=100 mode=balance-xor
alias net-pf-10 off
alias eth0 e1000
alias eth1 e1000
alias scsi_hostadapter megaraid_mbox
alias usb-controller ehci-hcd
alias usb-controller1 uhci-hcd

[Scott Ryan]

This one time, at band camp, Robin Mordasiewicz wrote:
> On Tue, 27 Sep 2005, Jim Christiansen wrote:
> > I've just purchased a server board with two 1 gig lan ports.  I would like 
> > to set one up for inbound traffic and  the other for outbound traffic.  
> > Can this be done??
> >
> > If this isn't possible is there another way to use these two ports to 
> > enhance network through-put??
>
> Your switch must support trunking of some sort. Most Cisco, or SMC

Its not trunking support that you need. Trunking is used for the spanning of VLAN information. Natively cisco switches will support the setup as described below. I have various setups using the bonding module, albeit that most of them are setup with mode=1 in modprobe.conf, which is the configuration for fail over rather than increased bandwidth. I also use the 8021q module with bonding to join multiple vlans

With the cisco switches (IOS and CATOS) it works whether the switchports are in access or trunk mode
> you want to bond the interfaces.
> The files you need to edit are
> /etc/sysconfig/network-scripts/ifcfg-bond0
> /etc/sysconfig/network-scripts/ifcfg-eth0
> /etc/sysconfig/network-scripts/ifcfg-eth1
> /etc/modprobe.conf
>
> [root@smtcorav02 ~ ]# cat /etc/sysconfig/network-scripts/ifcfg-bond0
> DEVICE=bond0
> ONBOOT=yes
> IPADDR=10.10.4.247
> BROADCAST=10.10.4.255
> NETMASK=255.255.255.0
> NETWORK=10.10.4.0
> GATEWAY=10.10.4.254
> BOOTPROTO=none
> USERCTL=no
> BONDING_SLAVE0="eth0"
> BONDING_SLAVE1="eth1"
> [root@smtcorav02 ~ ]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
> DEVICE=eth0
> BOOTPROTO=none
> ONBOOT=no
> TYPE=Ethernet
> MASTER=bond0
> SLAVE=yes
> USERCTL=no
> [root@smtcorav02 ~ ]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
> DEVICE=eth1
> BOOTPROTO=none
> ONBOOT=no
> TYPE=Ethernet
> MASTER=bond0
> SLAVE=yes
> USERCTL=no
> [root@smtcorav02 ~ ]# cat /etc/modprobe.conf
> alias bond0 bonding
> options bonding miimon=100 mode=balance-xor
> alias net-pf-10 off
> alias eth0 e1000
> alias eth1 e1000
> alias scsi_hostadapter megaraid_mbox
> alias usb-controller ehci-hcd
> alias usb-controller1 uhci-hcd

[Jay Lee]

Jim Christiansen said:
> I've just purchased a server board with two 1 gig lan ports.  I would
> like to set one up for inbound traffic and  the other for outbound
> traffic.  Can this be done??
>
> If this isn't possible is there another way to use these two ports to
> enhance network through-put??

Gigabit switches (and switches by nature actually) are full duplex,
meaning they can send and receive at the same time, so there would be no
benefit to doing RX on one NIC and TX on the other.  What you want is
bonding so that sending and receiving are split between the NICs:

http://www.linuxquestions.org/questions/showthread.php?s=&postid=1867215...

Jay