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Altera_Forum's avatar
Altera_Forum
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19 years ago

How to deal with the route in Linux

the next figure is my network

----<--Extern Network(ADSL module)(IP base : 192.168.1.1 netmask 255.255.255.0 -->

|

|

|______><Route (IP base 192.168.2.1 netmask 255.255.255.0)>-->

___><my PC IP : 192.168.2.102 netmask 255.255.255.0>

|

|_><my EP2C35 Board>

NOW, I have install a FTP seriver in my Pc. I want to transfer a file from the pc to my board

(ep2c35 dev kit)

so first i config the IP

<div class='quotetop'>QUOTE </div>

--- Quote Start ---

# ifconfig eth0 192.168.2.12 eth0

eth0:PHY 100BaseT

eth0:PHY Full Duplex[/b]

--- Quote End ---

ok I find it can&#39;t connect when I ping my PC

so i check the information of route.

<div class='quotetop'>QUOTE </div>

--- Quote Start ---

# route

Kernel IP routing table

Destination Gateway Genmask Flags Metric Ref Use Iface

192.168.2.0 * 255.255.255.0 U 0 0 0 eth0

127.0.0.0 * 255.0.0.0 U 0 0 0 lo

I don&#39;t konw how to change the IP(192.168.2.0) of eth0 to 192.168.2.1)

so i had to add a route .but i got a errors . # route add 192.168.1.1 gw 192.168.2.1 netmask 255.255.255.0 eth0

route: netmask 000000ff and host route conflict# [/b]

--- Quote End ---

if i don&#39;t care the netmask . the netmask will become to "255.255.255.255".

<div class='quotetop'>QUOTE </div>

--- Quote Start ---

# route add 192.168.1.1 gw 192.168.2.1 eth0# route

Kernel IP routing table

Destination Gateway Genmask Flags Metric Ref Use Iface

192.168.1.1 192.168.2.1 255.255.255.255 UGH 0 0 0 eth0

192.168.2.0 * 255.255.255.0 U 0 0 0 eth0

127.0.0.0 * 255.0.0.0 U 0 0 0 lo# [/b]

--- Quote End ---

can you tell me ! how to deal with it . thanks !

9 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    19 years ago

    do you config your board as following?

    ifconfig eth0 192.168.2.12 eth0

    you can use "ifconfig eth0 192.168.2.12".

    if the two device in the same subnet. The ip pocket won&#39;t transmit through the route
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    19 years ago

    enable this in in networking options of kernel config, and read the help of this , about ip forwarding,

    [* ] IP: advanced router
  • Altera_Forum's avatar
    Altera_Forum
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    19 years ago

    HI hippo

    I have select the next config

    [* ] IP: advanced router

    but now i find a strange things . when i use the next command in my PC (win-xp)

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    C:\Documents and Settings\alexliu>ping 192.168.2.12

    Pinging 192.168.2.12 with 32 bytes of data:

    Reply from 192.168.2.12: bytes=32 time<1ms TTL=64

    Reply from 192.168.2.12: bytes=32 time<1ms TTL=64

    Reply from 192.168.2.12: bytes=32 time<1ms TTL=64

    Reply from 192.168.2.12: bytes=32 time<1ms TTL=64

    Ping statistics for 192.168.2.12:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

    Approximate round trip times in milli-seconds:

    Minimum = 0ms, Maximum = 0ms, Average = 0ms[/b]

    --- Quote End ---

    but I use the next command in my Board (EP2C35)

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    # ping 192.168.2.102

    PING 192.168.2.102 (192.168.2.102): 56 data bytes

    --- 192.168.2.101 ping statistics ---

    6 packets transmitted, 0 packets received, 100% packet loss# ping 192.168.2.1

    PING 192.168.2.1 (192.168.2.1): 56 data bytes

    84 bytes from 192.168.2.1: icmp_seq=0 ttl=128 time=10.0 ms

    84 bytes from 192.168.2.1: icmp_seq=1 ttl=128 time=0.0 ms

    84 bytes from 192.168.2.1: icmp_seq=2 ttl=128 time=0.0 ms

    84 bytes from 192.168.2.1: icmp_seq=3 ttl=128 time=0.0 ms

    84 bytes from 192.168.2.1: icmp_seq=4 ttl=128 time=0.0 ms

    --- 192.168.2.1 ping statistics ---

    5 packets transmitted, 5 packets received, 0% packet loss

    round-trip min/avg/max = 0.0/2.0/10.0 ms[/b]

    --- Quote End ---

    so I cann&#39;t find the reason . why I can connect the router(192.168.2.1) but when i connect my pc(192.168.2.102) ,i cann&#39;t connect it .
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    19 years ago

    but you said your PC&#39;s IP is 192.168.2.102 ? not 192.168.1.101?

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    19 years ago

    --- Quote Start ---

    originally posted by hippo@Mar 15 2006, 10:03 AM

    but you said your pc&#39;s ip is 192.168.2.102 ? not 192.168.1.101?

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=13437)

    --- quote end ---

    --- Quote End ---

    sorry ,because my PC &#39;s IP be assign by the route(192.168.2.1), so it maybe beccome to 192.168.2.101.

    I don&#39;t Know Why can&#39;t ping the PC , I thinks the network should be can work.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    19 years ago

    Now I input the next command

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    127.0.0.0 * 255.0.0.0 U 0 0 0 lo# ifconfig eth0 192.168.2.12

    Heth0:PHY 100BaseT

    eth0:PHY Full Duplex# route -n

    Kernel IP routing table

    Destination Gateway Genmask Flags Metric Ref Use Iface

    192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

    127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo[/b]

    --- Quote End ---

    i add the route

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    # route add default gw 192.168.2.1# route -n

    Kernel IP routing table

    Destination Gateway Genmask Flags Metric Ref Use Iface

    192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

    127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo

    0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 eth0[/b]

    --- Quote End ---

    when i input the ping

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    # ping 192.168.2.102

    PING 192.168.2.102 (192.168.2.102): 56 data bytes

    --- 192.168.2.102 ping statistics ---

    3 packets transmitted, 0 packets received, 100% packet loss# ping 192.168.2.1

    PING 192.168.2.1 (192.168.2.1): 56 data bytes

    84 bytes from 192.168.2.1: icmp_seq=0 ttl=128 time=10.0 ms

    84 bytes from 192.168.2.1: icmp_seq=1 ttl=128 time=0.0 ms

    84 bytes from 192.168.2.1: icmp_seq=2 ttl=128 time=0.0 ms

    --- 192.168.2.1 ping statistics ---

    3 packets transmitted, 3 packets received, 0% packet loss

    round-trip min/avg/max = 0.0/3.3/10.0 ms# [/b]

    --- Quote End ---

    in my computer

    I input the ipconfig

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    Ethernet adapter &#26412;&#22320;&#36830;&#25509;:

    Connection-specific DNS Suffix . : private

    IP Address. . . . . . . . . . . . : 192.168.2.102

    Subnet Mask . . . . . . . . . . . : 255.255.255.0

    Default Gateway . . . . . . . . . : 192.168.2.1[/b]

    --- Quote End ---

    so I ping the board

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    C:\Documents and Settings\alexliu>ping 192.168.2.12

    Pinging 192.168.2.12 with 32 bytes of data:

    Reply from 192.168.2.12: bytes=32 time=1ms TTL=64

    Reply from 192.168.2.12: bytes=32 time<1ms TTL=64

    Reply from 192.168.2.12: bytes=32 time<1ms TTL=64

    Reply from 192.168.2.12: bytes=32 time<1ms TTL=64

    Ping statistics for 192.168.2.12:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

    Approximate round trip times in milli-seconds:

    Minimum = 0ms, Maximum = 1ms, Average = 0ms[/b]

    --- Quote End ---

    it very strange . I don&#39;t know how to deal with the problem . pls help me !

    thanks !!!
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    19 years ago

    Maybe it is the firewall on your xp, that blocks the ping.

    Can you ping outside your router from nios2?
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    19 years ago

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    Can you ping outside your router from nios2?[/b]

    --- Quote End ---

    what&#39;s means?

    I can ping outside in NIOS2

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    # ping 192.168.2.1

    PING 192.168.2.1 (192.168.2.1): 56 data bytes

    84 bytes from 192.168.2.1: icmp_seq=0 ttl=128 time=10.0 ms

    84 bytes from 192.168.2.1: icmp_seq=1 ttl=128 time=0.0 ms

    84 bytes from 192.168.2.1: icmp_seq=2 ttl=128 time=0.0 ms

    --- 192.168.2.1 ping statistics ---

    3 packets transmitted, 3 packets received, 0% packet loss[/b]

    --- Quote End ---

    but it only ping the 192.168.2.1 or

    when we have a another pc in the network(ip:192.169.2.100)

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    # ping 192.168.2.100

    PING 192.168.2.100 (192.168.2.100): 56 data bytes

    84 bytes from 192.168.2.100: icmp_seq=0 ttl=128 time=0.0 ms

    84 bytes from 192.168.2.100: icmp_seq=1 ttl=128 time=0.0 ms

    --- 192.168.2.100 ping statistics ---

    2 packets transmitted, 2 packets received, 0% packet loss

    round-trip min/avg/max = 0.0/0.0/0.0 ms# [/b]

    --- Quote End ---

    my pc maybe have some problem.

    I will check it !