Problems using the extended ping command

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When I try to use the extended ping command and specify a source IP address
I am receiving an 'invalid source' error. I have tried many different
combinations but with no joy, it does, however, work if I specify an
iterface (such as serial 0). I've also tried this on my 2611 router with
the same results, even if I type '?' at the 'source address' prompt I still
receive an eror message - does anyone have any ideas?

TIA, Jase


EAGLE2#ping
Protocol [ip]:
Target IP address: 192.168.1.2
Repeat count [5]:
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: 192.168.3.2
% Invalid source
Source address or interface: 10.0.0.1
% Invalid source
Source address or interface: serial 0
Type of service [0]:
Set DF bit in IP header? [no]:


EAGLE2 uptime is 24 minutes
System restarted by reload
System image file is "flash:c2500-d-l_120-11.bin"

cisco 2500 (68030) processor (revision L) with 6144K/2048K bytes of memory.
Processor board ID 06110204, with hardware revision 00000000
Bridging software.
X.25 software, Version 3.0.0.
Basic Rate ISDN software, Version 1.1.
1 Token Ring/IEEE 802.5 interface(s)
2 Serial network interface(s)
1 ISDN Basic Rate interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)

Configuration register is 0x2102

Re: Problems using the extended ping command
wrote:
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Can you do a sh ip int brief and post the results?

Re: Problems using the extended ping command
The source address you specify must be configured on an interface on the
router and be in an UP/UP state.  You can't just pick one at random,
otherwise how does the router get the replies?

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Re: Problems using the extended ping command
radnVkw0q_MzhnanZ2dnUVZ_uWlnZ2d@comcast.com:

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the
with

The source address I'm using is on another router which can't ping the
destination address, I'm troubleshooting the problem & running the
extended ping from this router as if the ping had originated on the
other. Both routers in question can ping each other fine, this seems
similar to examples I've seen on Cisco's site regarding the extended
ping command.

Jase

Re: Problems using the extended ping command
On Wed, 09 Jan 2008 09:05:02 +0000, Jason wrote:
 
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Similar, but differing in one small regard: you're setting the source
address to be that of a different router, and it won't work.

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Re: Problems using the extended ping command
@news.gradwell.net:

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Thanks for clearing that up, I'd made some incorrect assumptions.


Re: Problems using the extended ping command

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This option in extended ping is NOT for spoofing, it's just there to let
you select which of the router's addresses to use.  By default it uses
the address of the outgoing interface.  But if you have a router
connecting nets A and B, and you want to test whether machines on net A
(or beyond) can reach net B, you can use this option to specify the
router's net B address while pinging.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE don't copy me on replies, I'll read them in the group ***

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