GNS and tftp mystery
altdrugz
Member Posts: 69 ■■□□□□□□□□
in CCNA & CCENT
Hello,
straight to my problem... First I did a simple rip triangle router's topology running rip and did the tftp-server command in one of them. I tried to save some configurations file to the router and I was getting all the time "Timeout"s. So I said I ll do it in a way that it was described in youtube. This was to create a cloud and bind it to my local ethernet connection and run tftpd from my windows box. I was able to ping my gateway from my router (actually I did the #ip dhcp client-id command and my router took the assigned IP from my modem/gateway nicely). But I couldnt ping my host from the router nor I was able to tftp again. The strange thing was that in the wireshark it looks like my host INDEED replies to the echo requests but from router's debug im getting 5 dots and the following...
The first thing I thought was that devil with the name Windows Firewall so I disabled it but still the same things are happening.
Any suggestions?
PicPaste - mess-0X7PpTXO.png
PicPaste - ping_tftp_output-5rfxBSBg.png wireshark output of tftp request
PicPaste - ping_output-3MEL1PBh.png wireshark icmps
my host has the 192.168.2.2 the router got the .4 and my modem/gw has the .1 ip.
straight to my problem... First I did a simple rip triangle router's topology running rip and did the tftp-server command in one of them. I tried to save some configurations file to the router and I was getting all the time "Timeout"s. So I said I ll do it in a way that it was described in youtube. This was to create a cloud and bind it to my local ethernet connection and run tftpd from my windows box. I was able to ping my gateway from my router (actually I did the #ip dhcp client-id command and my router took the assigned IP from my modem/gateway nicely). But I couldnt ping my host from the router nor I was able to tftp again. The strange thing was that in the wireshark it looks like my host INDEED replies to the echo requests but from router's debug im getting 5 dots and the following...
00:05:23: IP: tableid=0, s=192.168.2.4 (local), d=192.168.2.2 (FastEthernet1/0), routed via RIB00:05:23: IP: s=192.168.2.4 (local), d=192.168.2.2 (FastEthernet1/0), len 100, sending.
00:05:25: IP: tableid=0, s=192.168.2.4 (local), d=192.168.2.2 (FastEthernet1/0), routed via RIB
00:05:25: IP: s=192.168.2.4 (local), d=192.168.2.2 (FastEthernet1/0), len 100, sending.
00:05:27: IP: tableid=0, s=192.168.2.4 (local), d=192.168.2.2 (FastEthernet1/0), routed via RIB
00:05:27: IP: s=192.168.2.4 (local), d=192.168.2.2 (FastEthernet1/0), len 100, sending.
00:05:29: IP: tableid=0, s=192.168.2.4 (local), d=192.168.2.2 (FastEthernet1/0), routed via RIB
00:05:29: IP: s=192.168.2.4 (local), d=192.168.2.2 (FastEthernet1/0), len 100, sending.
00:05:31: IP: tableid=0, s=192.168.2.4 (local), d=192.168.2.2 (FastEthernet1/0), routed via RIB
00:05:31: IP: s=192.168.2.4 (local), d=192.168.2.2 (FastEthernet1/0), len 100, sending.
Success rate is 0 percent (0/5)
The first thing I thought was that devil with the name Windows Firewall so I disabled it but still the same things are happening.
Any suggestions?
PicPaste - mess-0X7PpTXO.png
PicPaste - ping_tftp_output-5rfxBSBg.png wireshark output of tftp request
PicPaste - ping_output-3MEL1PBh.png wireshark icmps
my host has the 192.168.2.2 the router got the .4 and my modem/gw has the .1 ip.
Comments
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Monkerz
Member Posts: 842
Create a MS Loopback on your PC. Then assign that loopback the IP 10.10.10.2 and mask 255.255.255.252. In GNS3 create a cloud, bind the cloud to your MS Loopback on your PC. Drop a router in GNS3, connect it to the cloud via the interface you bound. Assign the router's interface IP 10.10.10.1 and mask 255.255.255.252. Bring up the router's interface.
From a command prompt on your PC ping 10.10.10.1, if successful you are in business.
When attempting to tftp, make sure the tftp server on your PC is using the loopback address as the server address. -
altdrugz
Member Posts: 69 ■■□□□□□□□□
Thank you so much !
Well I lost some time for finding my answers with the MS loopback thing etc but now its ok. I cannot understand why it wasnt working though... Still its a mystery!