Question about multiple ethernet cards
Albert T. Croft
Is it possible to use two ethernet cards on the same IP address to
increase the throughput for a system?
I work with a machine in which we now have two ethernet cards (3Com
Etherlink II/16TP and Etherlink III EISA). I attempted to set them both
up on the same address, assuming they would load balance (as, I
understand, can be done with some serial connections). They are both
recognized, but when I execute "ifconfig", I get the following (IP and HW
addresses removed for security purposes-my sys admin is relatively new,
and a little paranoid about security :) :
eth0 Link encap:10Mbps Ethernet HWaddr aa:bb:cc:dd:ee:ff
inet addr:uu.vv.ww.xx Bcast:uu.vv.ww.yy Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9664357 errors:0 dropped:0 overruns:0
TX packets:640235 errors:0 dropped:0 overruns:0
Interrupt:5 Base address:0x300 Memory:cc000-ce000
eth1 Link encap:10Mbps Ethernet HWaddr ll:kk:jj:ii:hh:gg
inet addr:uu.vv.ww.xx Bcast:uu.vv.ww.yy Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9763629 errors:2688 dropped:2688 overruns:2752
TX packets:7658 errors:0 dropped:0 overruns:0
Interrupt:10 Base address:0x8000
I'm still new to the networking side of linux, so can someone please help
me on this? Any help deeply appreciated. I don't get to check the groups
that often, so please email responses. Thank you.
=======================================+======================================
Albert Thomas Croft |"We know now that in the early years
Box 6868 SFASU | of the 20th century, this world was
Nacogdoches, Texas 75962 | being watched closely by
Email: z_cr...@titan.sfasu.edu, | intelligences greater than man..."
acr...@lalab.sfasu.edu | - from "The War of the Worlds"
=======================================+======================================
Albert T. Croft
In light of everyone telling me that what I intended to do would
not work (and that I probably should not be expecting the system to work
either, due to potential conflicts), I have another question. I have now
set eth1 up to possess another IP address (/etc/rc.inet1); however, I
can't so much as ping the address and get a response (64 packets
transmitted, 100% packet loss). What did I forget to do (the only change
I did make was in /etc/rc.inet1). Again, any response deeply appreciated.
I'd also like to thank everyone who responded to my earlier inquiry
(attached below).
==============================================================================
Martin Reilly
In article: <Pine.LNX.3.93.97031...@lalab.lib-arts.sfasu.edu>
> In light of everyone telling me that what I intended to do would
> not work (and that I probably should not be expecting the system to work
> either, due to potential conflicts), I have another question. I have now
> set eth1 up to possess another IP address (/etc/rc.inet1); however, I
> can't so much as ping the address and get a response (64 packets
> transmitted, 100% packet loss). What did I forget to do (the only change
> I did make was in /etc/rc.inet1). Again, any response deeply appreciated.
Have you started the routed deamon?
--
Martin Reilly
mar...@neige.demon.co.uk
Mark Bakarich, regular guy
Albert T. Croft wrote:
>
> In light of everyone telling me that what I intended to do would
> not work (and that I probably should not be expecting the system to work
> either, due to potential conflicts), I have another question. I have now
> set eth1 up to possess another IP address (/etc/rc.inet1); however, I
> can't so much as ping the address and get a response (64 packets
> transmitted, 100% packet loss). What did I forget to do (the only change
> I did make was in /etc/rc.inet1). Again, any response deeply appreciated.
If the two cards are not on the same ethernet segment, you will need
to specify a route to the other IP address. Something like...
route add -host xx.yy.zz.123 eth1
Of course 'man route' should illuminate the specific syntax.
(mailed & posted)
--
Regards,
--------
Mark Bakarich, Engineer, Tucson Arizona