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 Post subject: routers with PC interface eth0 - ARP ok but not icmp
PostPosted: Thu Sep 11, 2014 11:07 pm 
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Joined: Thu Sep 11, 2014 10:59 pm
Posts: 2
I would want to connect my ethernet interface (eth0 on my debian linux) with gns3 router.
So i build that :
    Router<-->Ethernet switch<--->cloud.
The cloud is configured with NIO ethernet.
I also use wireshark on eth0.
the problem is i can't ping but the link seems to be good :
- if i ping from router to my PC interface (eth0) I have no answer but wireshark show me ARP Requests that comes from router.
- if i ping from my PC interface (eth0) to router I have no answer but wireshark show me ARP Requests(from my client) AND ARP reply(from the router) but the "ping" program seems to not see the ARP reply and emit again (and again...) ARP Requests

what's going wrong?

Some configuration(ask me if you want more) :
-router config :
Code:
   R4#configure terminal
   Enter configuration commands, one per line.  End with CNTL/Z.
   R4(config)#interface FastEthernet0/0
   R4(config-if)#ip address 192.168.1.98 255.255.255.0
   R4(config-if)#no shutdown
   R4(config-if)#
   *Sep 12 00:33:16.539: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
   R4(config-if)#
   *Sep 12 00:33:16.539: %ENTITY_ALARM-6-INFO: CLEAR INFO Fa0/0 Physical Port Administrative State Down
   *Sep 12 00:33:17.539: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
   R4(config-if)#


-router ip :
Code:
   R4#show ip interface brief
   Interface                  IP-Address      OK? Method Status                Protocol
   FastEthernet0/0            192.168.1.98    YES manual up                    up 


-eth0 on linux :
Code:
   [email protected]:/home/seb# ifconfig eth0
   eth0      Link encap:Ethernet  HWaddr 74:d0:2b:91:74:e6 
             inet adr:192.168.1.68  Bcast:192.168.1.255  Masque:255.255.255.0
             adr inet6: 2001:41d0:fc22:5300:76d0:2bff:fe91:74e6/64 Scope:Global
             adr inet6: fe80::76d0:2bff:fe91:74e6/64 Scope:Lien
             adr inet6: 2001:41d0:fc22:5300:18c5:ca44:9c03:e0e9/64 Scope:Global
             UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
             RX packets:12492795 errors:0 dropped:0 overruns:0 frame:0
             TX packets:39643466 errors:0 dropped:0 overruns:0 carrier:0
             collisions:0 lg file transmission:1000
             RX bytes:6678299892 (6.2 GiB)  TX bytes:54812492972 (51.0 GiB)
             Interruption:41




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 Post subject: Re: routers with PC interface eth0 - ARP ok but not icmp
PostPosted: Sun Sep 14, 2014 1:11 pm 
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Joined: Thu Sep 11, 2014 10:59 pm
Posts: 2
I restarted my computer and get back to the beginning of the configuration and it works now. I don't know what I have done before but it was probably a bad configuration .

If an administrator wants, this discution can then be deleted. Sorry for that!




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