Re: [Sheflug] Errors on eth0

[fred <fred.dodd [at] xxxxxxxxxxxxxx>]

On Mon, 2003-11-17 at 13:58, Dawson, Alan wrote:
> Hi all,
> 
> 
> I have a linux box acting as a router on a 10 mbit line, 
> the other end is a Cisco 2621 with dual fast ethernet ports.  
> 
> I'm not getting the performance from the line I would hope, 
> and I'm attempting to track the problems.
> 
> The PC is a 400Mhz Pentium II  with 2 ethernet cards simply routing 
> and a small amount of Packet filetering. (dropping icmp-type 8)
> which is I think pings (this is to filter MS Welchia worm scanning traffic)
> 
> Using mrtg to measure bandwidth usage I don't seem to be able to get more 
> than 2Mbit from the line.
> This is similar to the numbers I get from copying files using windows
> robocopy
> 
> Doing a ifconfig on the lan side
> 
> clownerouter:~ # ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr 00:04:75:D2:4C:2E
>           inet addr:172.25.1.250  Bcast:172.25.255.255  Mask:255.255.0.0
>           inet6 addr: fe80::204:75ff:fed2:4c2e/10 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:8512868 errors:0 dropped:0 overruns:1 frame:0
>           TX packets:6239407 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:100
>           RX bytes:4022267518 (3835.9 Mb)  TX bytes:2136425933 (2037.4 Mb)
>           Interrupt:12 Base address:0x1400
> 
> which looks OK
> 
> but on the wan side
> 
> clownerouter:~ # ifconfig eth1
> eth1      Link encap:Ethernet  HWaddr 00:C0:CA:15:61:BF
>           inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
>           inet6 addr: fe80::2c0:caff:fe15:61bf/10 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:6173121 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:5774684 errors:362353 dropped:0 overruns:0
> carrier:724706
> 					^^^^^^^^^^^^
>           collisions:372551 txqueuelen:100
>           RX bytes:2129446956 (2030.7 Mb)  TX bytes:3315793152 (3162.1 Mb)
>           Interrupt:10 Base address:0x4400
> 
> I get a lot of errors.
> 
> Is this BAD.  should I replace the NIC,  or is it the WAN line itself. or
> could it be the 2621?
> 
> Any thoughts ?
What NIC are you using on the eth1. change it for a start and would
expect they are both the same make. 10/100mb or above?

Further to this I would try to use routerlinux install from

http://www.routerlinux.com/

download it and install it on your hard drive, compact flash card this
only needs 15mb - 11mb install.

But it can talk to CISCO routers.

you need to check the install readme for the hard drive

mount -o remount,rw /

This will allow you to write the config files, if you wish to ssh or use
hyper terminal then its best to alter the rc.local rc.firewall files
until you get it to work. The system can then be configured as a normal
CISCO router but you need to use a port number for each protocol.

regards

fred dodd



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