eth0+ppp0 ?

[luis@aztlan.fb10.tu-berlin.de (luis)]

hello

how can i switch as the default route, between eth0 y ppp0?

is for a machine that need to get access to the net in both ways,
either using the ethernet card or with the modem

the ethernet card is ok, the modem can fax and minicom, i also have
access to the ppp conexion, and i get an IPm but i cannot go any
place, or can not make a ping to any other machine (using ppp)

i have read that i need to switch the default path of route, but m how
can i make it?

i get the following results with ifconfig and route -e

thanks a lot

eth0      Link encap:Ethernet  HWaddr 00:E0:7D:76:AA:C2  
          inet addr:130.149.13.151  Bcast:130.149.13.255  Mask:255.255.254.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:14177 errors:0 dropped:0 overruns:0 frame:4
          TX packets:2672 errors:333 dropped:0 overruns:0 carrier:666
          collisions:5687 txqueuelen:100 
          Interrupt:11 Base address:0xe400 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:3924  Metric:1
          RX packets:219 errors:0 dropped:0 overruns:0 frame:0
          TX packets:219 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:195.243.107.149  P-t-P:192.168.100.254  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:34 errors:0 dropped:0 overruns:0 frame:0
          TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:10 

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
192.168.100.254 *               255.255.255.255 UH        0 0          0 ppp0
localnet        *               255.255.254.0   U         0 0          0 eth0
default         gate-12-62.zrz. 0.0.0.0         UG        0 0          0 eth0