I should have looked closer. Thanks.
----- Original Message -----
From: "Priscilla Oppenheimer"
To:
Sent: Tuesday, June 26, 2001 7:08 PM
Subject: Re: Is a CDP frame a broadcast, multicast or unicast? [7:10024]
> Debug is kind of limited. You could get a free analyzer!? I encourage it.
> There's a list of analyzers here:
>
> http://wwwhost.ots.utexas.edu/ethernet/enet-analyzers.html
>
> By the way, I did answer your question the first time. I'm not sure that
> you saw that. On Ethernet, CDP sends to the Cisco multicast address
> 01:00:0C:CC:CC:CC.
>
> I hope that didn't ruin the surprise. ;-)
>
> Priscilla
>
> At 05:26 PM 6/26/01, [EMAIL PROTECTED] wrote:
> >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
> ________________________
>
> Priscilla Oppenheimer
> http://www.priscilla.com
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=10054&t=10024
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