How to deal with the route in Linux

Altera_Forum · ‎03-13-2006

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

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# ifconfig eth0 192.168.2.12 eth0

eth0:PHY 100BaseT

eth0:PHY Full Duplex[/b]

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ok I find it can't connect when I ping my PC

so i check the information of route.

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# 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'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]

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if i don't care the netmask . the netmask will become to "255.255.255.255".

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# 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 !

Altera_Forum · ‎03-14-2006

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't transmit through the route

Altera_Forum · ‎03-14-2006

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

[* ] IP: advanced router

Altera_Forum · ‎03-14-2006

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)

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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

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)

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# 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'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't connect it .

Altera_Forum · ‎03-15-2006

but you said your PC's IP is 192.168.2.102 ? not 192.168.1.101?

Altera_Forum · ‎03-15-2006

--- Quote Start ---

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

but you said your pc's ip is 192.168.2.102 ? not 192.168.1.101?

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

I don't Know Why can't ping the PC , I thinks the network should be can work.

Altera_Forum · ‎03-15-2006

ifconfig eth0 192.168.2.12 route add default gw 192.168.2.1

Altera_Forum · ‎03-15-2006

Now I input the next command

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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

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# 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]

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when i input the ping

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# 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]

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in my computer

I input the ipconfig

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Ethernet adapter 本地连接:

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

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--- 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

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't know how to deal with the problem . pls help me !

thanks !!!

Altera_Forum · ‎03-15-2006

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

Can you ping outside your router from nios2?

Altera_Forum · ‎03-15-2006

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

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what's means?

I can ping outside in NIOS2

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# 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]

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but it only ping the 192.168.2.1 or

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

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# 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 !