I turned all debugging for CDP on and I am no seeing much? I don't have a
sniffer.
r2#sh cdp nei
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP
Device ID Local Intrfce Holdtme Capability Platform Port ID
r3 Eth 2/0 134 R 1000 Eth 0
r4 Eth 2/1 124 R 2500 Eth 0
r2#
r2#debug cdp ?
adjacency CDP neighbor info
events CDP events
packets CDP packet-related information
r2(config-if)#
CDP-AD: Interface Ethernet2/0 going down
CDP-PA: Packet sent out on Ethernet2/0
CDP-AD: Interface Ethernet2/0.1 going down
CDP-PA: Packet sent out on Ethernet2/0.1
CDP-AD: Interface Ethernet2/0.2 going down
CDP-PA: Packet sent out on Ethernet2/0.2
CDP-AD: Interface Ethernet2/0 going down
CDP-PA: Packet sent out on Ethernet2/0
CDP-AD: Interface Ethernet2/0.1 going down
CDP-PA: Packet sent out on Ethernet2/0.1
CDP-AD: Interface Ethernet2/0.2 going down
CDP-PA: Packet sent out on Ethernet2/0.2
%LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet2/0, changed state
to d
CDP-EV: Encapsulation on interface Serial0/0 failed
CDP-PA: Packet sent out on Ethernet2/1
%LINK-5-CHANGED: Interface Ethernet2/0, changed state to administratively
down
r2(config-if)#no shut
r2(config-if)#
CDP-AD: Interface Ethernet2/0 coming up
CDP-PA: Packet sent out on Ethernet2/0
CDP-AD: Interface Ethernet2/0.1 coming up
CDP-PA: Packet sent out on Ethernet2/0.1
CDP-AD: Interface Ethernet2/0.2 coming up
CDP-PA: Packet sent out on Ethernet2/0.2
%LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet2/0, changed state
to
CDP-AD: Interface Ethernet2/0 coming up
CDP-PA: Packet sent out on Ethernet2/0
CDP-AD: Interface Ethernet2/0.1 coming up
CDP-PA: Packet sent out on Ethernet2/0.1
CDP-AD: Interface Ethernet2/0.2 coming up
CDP-PA: Packet sent out on Ethernet2/0.2
%LINK-3-UPDOWN: Interface Ethernet2/0, changed state to up
----- Original Message -----
From: "Priscilla Oppenheimer"
To:
Sent: Tuesday, June 26, 2001 4:45 PM
Subject: Re: Is a CDP frame a broadcast, multicast or unicast? [7:10024]
> At 06:21 PM 6/26/01, [EMAIL PROTECTED] wrote:
> >Is a CDP frame a broadcast, multicast or unicast?
>
> Why don't you turn on debug or use an analyzer and find out for yourself!?
> :-) You would learn a lot.
>
> > The frame contains no
> >source
> >or destination.
>
> If it contains no destination, then why are you wondering if it is
destined
> to a broadcast, multicast, or unicast address?
>
> On LANs, it does contain a source (the router or switch that is sending
the
> info) and a destination, the Cisco multicast address 01:00:0C:CC:CC:CC.
>
> Perhaps the statement meant that on a point-to-point WAN link it doesn't
> include a source and destination. That could be true.
>
> Priscilla
>
> > It consists of a header, followed by a set of variable-length
> >fields consisting of type/length/value.
> ________________________
>
> Priscilla Oppenheimer
> http://www.priscilla.com
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=10037&t=10024
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
