From mboxrd@z Thu Jan 1 00:00:00 1970 From: JHoskins98@aol.com Subject: Re: what traffic is this? Date: Wed, 26 Jun 2002 09:25:34 EDT Sender: netfilter-admin@lists.samba.org Message-ID: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_fd.19d60313.2a4b1ace_boundary" Return-path: Errors-To: netfilter-admin@lists.samba.org List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: To: netfilter@lists.samba.org --part1_fd.19d60313.2a4b1ace_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit The traffic is CDP - Cisco Discovery Protocol. It is a heartbeat to detect changes i.e. newly attached or detacted cisco equipment. You can turn it off with "no cdp run" command at the enable prompt or "no cdp enable" at the interface. jhh In a message dated 6/26/2002 7:37:06 AM Eastern Standard Time, netfilter-request@lists.samba.org writes: > This traffic comes from a cisco router. > what type of traffic is ? > > [root@cuelebre root]# tcpdump -i eth2 > tcpdump: listening on eth2 > > 13:19:12.640000 0:4:dd:c:42:a6 0:4:dd:c:42:a6 loopback 60: > 0000 0100 0000 0000 0000 0000 0000 0000 > 0000 0000 0000 0000 0000 0000 0000 0000 > 0000 0000 0000 0000 0000 0000 0000 > 13:19:22.640000 0:4:dd:c:42:a6 0:4:dd:c:42:a6 loopback 60: > 0000 0100 0000 0000 0000 0000 0000 0000 > 0000 0000 0000 0000 0000 0000 0000 0000 > 0000 0000 0000 0000 0000 0000 0000 --part1_fd.19d60313.2a4b1ace_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: 7bit The traffic is CDP - Cisco Discovery Protocol. It is a heartbeat to detect changes i.e. newly attached or detacted cisco equipment.

You can turn it off with "no cdp run" command at the enable prompt or "no cdp enable" at the interface.
jhh

In a message dated 6/26/2002 7:37:06 AM Eastern Standard Time, netfilter-request@lists.samba.org writes:

This traffic comes from a cisco router.
what type of traffic is ?

[root@cuelebre root]# tcpdump -i eth2
tcpdump: listening on eth2

13:19:12.640000 0:4:dd:c:42:a6 0:4:dd:c:42:a6 loopback 60:
                         0000 0100 0000 0000 0000 0000 0000 0000
                         0000 0000 0000 0000 0000 0000 0000 0000
                         0000 0000 0000 0000 0000 0000 0000
13:19:22.640000 0:4:dd:c:42:a6 0:4:dd:c:42:a6 loopback 60:
                         0000 0100 0000 0000 0000 0000 0000 0000
                         0000 0000 0000 0000 0000 0000 0000 0000
                         0000 0000 0000 0000 0000 0000 0000

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