How Ping Ethernet to Ethernet when no IP address?

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Feb 12th, 2009
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How can I ping point to point, or ethernet to ethernet when there is no IP address assigned? Is that possible? I tried using a MAC address with Ping but that did not work. In this case its a PC to a ethernet to 100BaseF (fiber) conversion and I want to send pings to test the link (no other routers or switches involved, just point to point). Any insight appreciated

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John Blakley Thu, 02/12/2009 - 09:25
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You won't be able to ping anything without an IP address.


HTH,


John

RobinCruz Thu, 02/12/2009 - 09:46
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Understood. Ill have to add another Ip configurable device on the other end. How do people test ethernet. They must do it without having to have TCP/IP?

royalblues Thu, 02/12/2009 - 09:25
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The PC needs to have an ip address and on the other end of the fiber connector connect another PC and configure an ip address on the same subnet.


You can then ping from one PC to other


Narayan

fjcardenas-1 Thu, 02/12/2009 - 09:58
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If you use a firewall or something else, make sure it allows pings.

b.julin Thu, 02/12/2009 - 13:27
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See if "traceroute mac" does what you want


It will not do a ping, but it will recursively crawl through the switch MAC tables. I have not used it much, though, so I am not sure if it is limited to devices that have generated traffic enough to get into the middle of the network, or whether it sends out some sort of proprietary query to find idle MACs.


I imagine there is no way at all to find a system that is so idle that its mac address is not even in the table of the switch it is attached to, however, not even with traceroute mac.


http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.1_14_ea1/command/reference/cli3.html


Leo Laohoo Thu, 02/12/2009 - 14:24
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Depending on the model of your switch, try TDR (Time Domain Reflectometer).


The command in enable mode is:

test cable-diagnostics tdr interface


The command to see the result is

show cable-diagnostics tdr interface


Does this help?

RobinCruz Thu, 02/12/2009 - 16:07
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Those are all great thoughts. It might be easiest to configure something with an laptop on each end. Thanks again!

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