CDP spans only one hop. If you wanted to see the CDP info for a series of
devices, you would need to telnet to each subsequent one to look at the next
one in the chain.
>From: Priscilla Oppenheimer <[EMAIL PROTECTED]>
>Reply-To: Priscilla Oppenheimer <[EMAIL PROTECTED]>
>To: "Nabil Fares" <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]>
>Subject: Re: CDP protocol
>Date: Tue, 28 Nov 2000 13:35:27 -0800
>
>A CDP-enabled interface learns about all other CDP-enabled devices on its
>LAN, so I'm not sure why you would wonder about it learning about the C5505
>and the 1900. CDP messages are sent to a data-link-layer multicast address
>that traverses switches. Maybe the 1900 is behind the C5505. Without more
>information on your topology, it's hard to give a more definite answer.....
>
>Priscilla
>
>At 03:11 PM 11/28/00, Nabil Fares wrote:
>>Greetings,
>>
>>I've an interesting one for you guys. When I issue a "sh cdp neigh"
>>command
>>on a 25XX router, I get 2 devices (WS-C5505 and 1900) on the same E0
>>interface. The destination port for the 5505 is 3/8, and the 1900 is B.
>>I
>>don't really have physical access to the equipment for visual inspection.
>>Could there be a dump hub between the switches? since a dump hub doesn't
>>have a MAC address, the cdp protocol is showing both devices instead!
>>
>>Any help on this one guys is appreciated.
>>
>>Thanks,
>>
>>Nabil
>>
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>
>
>________________________
>
>Priscilla Oppenheimer
>http://www.priscilla.com
>
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