Re: curl-loader crashing network on ubuntu machine

[Robert I. <cor...@gm...>]

Hi,

On Wed, Apr 2, 2008 at 12:12 PM, MLVJ <ml...@ya...> wrote:
>
>  The problem seems to be that curl-loader changes the
>  routing table, and blonks out the management interface
>  route.
>
>  Here's the route -n before running curl:
>  route -n
>  Kernel IP routing table
>  Destination     Gateway         Genmask         Flags
>  Metric Ref    Use Iface
>  10.59.70.64     0.0.0.0         255.255.255.240 U
>  0      0        0 eth0
>  10.59.241.128   0.0.0.0         255.255.255.224 U
>  0      0        0 eth1
>  0.0.0.0         10.59.70.65     0.0.0.0         UG
>  100    0        0 eth0
>  0.0.0.0         10.59.241.129   0.0.0.0         UG
>  100    0        0 eth1
>
>  ...and after running curl there's a new default route:
>  route -n
>  Kernel IP routing table
>  Destination     Gateway         Genmask         Flags
>  Metric Ref    Use Iface
>  10.59.70.64     0.0.0.0         255.255.255.240 U
>  0      0        0 eth0
>  10.59.241.128   0.0.0.0         255.255.255.224 U
>  0      0        0 eth1
>  0.0.0.0         10.59.70.65     0.0.0.0         UG
>  100    0        0 eth0
>  0.0.0.0         10.59.241.129   0.0.0.0         UG
>  100    0        0 eth1
>  10.59.0.0       0.0.0.0         255.255.0.0     U
>  0      0        0 eth0 (something like that)
>
>  so maybe an issue with the netmask, set to 16 in the
>  bulk.conf example. I have just set this to 25 (what
>  the actual netmask should be). Let's try that. Gosh it
>  didn't kill the network, and this route was added:
>  10.59.250.0     0.0.0.0         255.255.255.128 U
>  0      0        0 eth0


Good analyzes!
Y mean netmask 24 (not 25), worth trying it.
curl-loader opens the secondary ip-addreses similar to the command
#ip from the iproute or iproute2 package.

try to add these addresses by the command
# ip add .... (man ip)

If you see, that a new route appears, this means, that this is a kernel's
decision logic. Y can argue at linux-netdev, whether the logic is appropriate.

The simplest way to workaround it could be to edit the routing
table using either of the commands:
route
ip.

Sorry, curl-loader is a userland application and is not in position
to control the kernel's decisions.

Sincerely,
Robert Iakobashvili
"Light will come from Jerusalem"
...........................................................
http://curl-loader.sourceforge.net
An open-source web testing and traffic generation.