enabling two eths

Fri Feb 23 07:38:48 EST 2007

so eth1 works but eth0 doesn't?

what's interesting is here you have no tx/rx/error packets -- how do you
know its not working?

Are there machines on this subnet which are working?

Also ping into the machine...

Its also sometimes useful to have a hub (not a switch) and sniff the
packets...

marty

________________________________

	From: Manjunath AM [mailto:Manjunath.AM at Lntemsys.com] 
	Sent: Wednesday, February 21, 2007 11:24 PM
	To: Leisner, Martin
	Cc: linuxppc-embedded at ozlabs.org;
linuxppc-embedded-bounces+manjunath.am=lntemsys.com at ozlabs.org; Vitaly
Bordug
	Subject: RE: enabling two eths

	Hi Martin, 

	Thanks for your reply,Yes I tried swapping the assignments,same
thing is happening in both cases..ifconfig and route -n results are as
below: 

	ifconfig 

	eth0      Link encap:Ethernet  HWaddr 00:99:23:C4:AD:DE 
	          inet addr:192.168.33.64  Bcast:192.168.33.255
Mask:255.255.248.0 
	          inet6 addr: fe80::299:23ff:fec4:adde/64 Scope:Link 
	          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1 
	          RX packets:0 errors:0 dropped:0 overruns:0 frame:0 
	          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 
	          collisions:0 txqueuelen:1000 
	          RX bytes:0 (0.0 b)  TX bytes:308 (308.0 b) 
	          Base address:0x8400 

	eth1      Link encap:Ethernet  HWaddr 00:99:23:44:AD:DE 
	          inet addr:192.168.178.124  Bcast:192.168.178.255
Mask:255.255.255.0 
	          inet6 addr: fe80::299:23ff:fe44:adde/64 Scope:Link 
	          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1 
	          RX packets:22790 errors:0 dropped:0 overruns:0 frame:0

	          TX packets:9218 errors:0 dropped:0 overruns:0
carrier:8830 
	          collisions:0 txqueuelen:1000 
	          RX bytes:14916045 (14.2 MiB)  TX bytes:1463093 (1.3
MiB) 
	          Base address:0x8500 

	lo        Link encap:Local Loopback 
	          inet6 addr: ::1/128 Scope:Host 
	          UP LOOPBACK RUNNING  MTU:16436  Metric:1 
	          RX packets:0 errors:0 dropped:0 overruns:0 frame:0 
	          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 
	          collisions:0 txqueuelen:0 
	          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b) 

	route -n 
	Destination     Gateway         Genmask         Flags Metric Ref
Use Iface 
	192.168.178.0   0.0.0.0         255.255.255.0   U     0      0
0 eth1 
	192.168.32.0    0.0.0.0         255.255.248.0   U     0      0
0 eth0 
	0.0.0.0         192.168.178.47  0.0.0.0         UG    0      0
0 eth1 

	Thanks & Regards
	MANJUNATH AM
	Senior Software Engineer
	Emsys
	Larsen & Toubro Limited
	Mysore-570018
	Mobile:9886375926

"Leisner, Martin" <Martin.Leisner at xerox.com> 
Sent by: linuxppc-embedded-bounces+manjunath.am=lntemsys.com at ozlabs.org 

02/21/2007 09:58 PM 

To
"Manjunath AM" <Manjunath.AM at Lntemsys.com>, "Vitaly Bordug"
<vbordug at ru.mvista.com> 
cc
linuxppc-embedded at ozlabs.org 
Subject
RE: enabling two eths

	Send the results of 
	ifconfig 
	and 
	route -n 

	I take it eth0 works fine... 

	Have you tried swapping the assignments and see if eth1 works
(to eliminate faulty hardware). 

	marty 

________________________________

	From:
linuxppc-embedded-bounces+martin.leisner=xerox.com at ozlabs.org
[mailto:linuxppc-embedded-bounces+martin.leisner=xerox.com at ozlabs.org]
On Behalf Of Manjunath AM
	Sent: Tuesday, February 20, 2007 11:50 PM
	To: Vitaly Bordug
	Cc: linuxppc-embedded at ozlabs.org
	Subject: Re: enabling two eths

	Hi, Thanks for your kind reply, Yes i have used different * IP
Subnets* 

	The IPs and subnet details I use is 
	1. eth0(configured through u-boot env settings)->>
192.168.174.231 and subnet is 255.255.255.0 
	2. eth1(configured after kernel is up)--> 192.168.33.64 and
subnet is 255.255.248.0 

	Even i tried by connecting second eth to host PC using cross
cable as a stand-alone network but even "ping" did not work.. 

	Thanks & Regards
	MANJUNATH AM
	Senior Software Engineer
	Emsys
	Larsen & Toubro Limited
	Mysore-570018
	Mobile:9886375926

Vitaly Bordug <vbordug at ru.mvista.com> 

02/20/2007 09:30 PM 

To
Alex Zeffertt <ajz at cambridgebroadband.com> 
cc
Manjunath AM <Manjunath.AM at Lntemsys.com>, linuxppc-embedded at ozlabs.org 
Subject
Re: enabling two eths

	On Tue, 20 Feb 2007 15:31:54 +0000
	Alex Zeffertt <ajz at cambridgebroadband.com> wrote:

	> 
	> Manjunath AM wrote:
	> > 
	> > Hi,
	> > 
	> > We are using MPC8272 based target board, we use montavista
Linux version 
	> > 2.6.10 kernel image (with NFS enabled) to our target board,
	> > 
	> > Our board has  2 FCCs (eth0 and eth1). bot the eth's works
perfectly 
	> > when we use them independently, but when we are trying to
enable second 
	> > one after the kernel is up using linux command  "ifconfig
eth1 
	> > 192.168.33.64 up"(IP address)nothing is working.
	> > Please suggest how to enable second eth (either 0 or 1) once
the kernel 
	> > is up with NFS file system
	> 
	> 
	> Have you made sure that eth0 and eth1 are on *different* IP
subnets?
	> If they are on the same subnet, or intersecting subnets, your
routing
	> will get confused.
	> 
	It depends :)

	I used to test functionality such a way to have two enets in
same subnet, then ifdown one of them.

	At least with mvista RFS, one enet  handles NFS, other is up but
all the packets are routed to it via
	the first one. And when the first one got ifdown, routing
switches to the remaining enet...
	-- 
	Sincerely, 
	Vitaly
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