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Copy or backup a Cisco 2501/2520 IOS using TFTP.

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19 years 10 months ago #4115 by Neon
ok so I assume that you are just connected to your router through the console port? If that is the case that’s reason why you cannot reach your TFTP server.

You will need to setup one interface (normally the first Ethernet interface) with the same subnet values as you have your TFTP server on.

If you have connected with the Ethernet port then the problem lies elsewhere…

However first go back to basics, as IFTY said: see if you can ping your TFTP server. If it fails that is the first problem to fix before attempting to use TFTP.
Let us know how you go.
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19 years 10 months ago #4116 by sahirh
go to another box, and try and download a file from the tftp server from there. Windows comes with a rudimentary TFTP client, you can just GET and PUT a file to make sure its functioning okay. If that fails, you know you have to sort out the TFTP problem first.

Are you filtering UDP btw ?

Sahir Hidayatullah.
Firewall.cx Staff - Associate Editor & Security Advisor
tftfotw.blogspot.com
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19 years 10 months ago #4128 by tituskron
Gentlemen,

This is the response to ping issue.

1. Still I can’t ping from Cisco 2501 (thru Hyperterminal) to my laptop.
2. I tried 2 laptops as my host PC (Compaq & Sony).
3. I tried Windows 2K Server, Professional & Win 98 as OS for those laptops.
4. I tried 192, 168.0.1 & 169.254.0.1 as IP for those laptops.
5. I can ping those IP from my laptop but can’t ping from the 2501.
6. I can gurantee you that my Hyperterminal is working well as well as the
rollover cable – else, I won’t be able to get a router prompt.
7. I am running out of ideas for this simple task. So I thought maybe I need to
to setup something from the router side so it can talk to the laptop.
8. Anymore suggestions is highly appreciated.
9. Thank you again

tituskron

C:\>ping 192.168.0.1

Pinging 192.168.0.1 with 32 bytes of data:

Reply from 192.168.0.1: bytes=32 time<10ms TTL=128
Reply from 192.168.0.1: bytes=32 time<10ms TTL=128
Reply from 192.168.0.1: bytes=32 time<10ms TTL=128
Reply from 192.168.0.1: bytes=32 time<10ms TTL=128

Ping statistics for 192.168.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

C:\>

Router>en
Router#ping 192.168.0.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Router#
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19 years 10 months ago #4132 by sahirh
Well I guess the first thing to work out is connectivity from the router to the machine running the TFTP server.. have you checked the interface configurations.. I dont know your setup but try a traceroute from any of the boxes to the router and see whether you get anything through...

also make sure you don't have any ACL's on the router that are blocking the transfer.

Sahir Hidayatullah.
Firewall.cx Staff - Associate Editor & Security Advisor
tftfotw.blogspot.com
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19 years 10 months ago #4154 by Chris
tituskron,

Can you please follow these steps:

1) Connect to your device via a console cable and run Hyperterminal or whatever similar program you use.

2) log in and issue a "show run"

3) Copy paste the results here and use the "code" buttons so it's inserted in a nice black box

4) Provide the IP addressing scheme used in your network, including the machines your trying to perform the tftp to/from. Also note how they are connected to the switch (directly? or is there another switch involved?)

As soon as you get that info posted, you'll have a solution posted by one of our members.

Cheers,

Chris Partsenidis.
Founder & Editor-in-Chief
www.Firewall.cx
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19 years 10 months ago #4175 by IFTY
tituskron

give me IP address and subnet mask of ur router and TFTP server

keep in mind...
router and TFTP server should be on the same subnet.
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