From: John Mistichelli (jmistich@xxxxxxxxxxxxx)
Date: Mon Apr 16 2001 - 10:11:39 GMT-3
CDP uses a multicast address for its periodic advertisements. To make it
work on frame relay you will have to enable support for broadcast on the VC
and simply use the command "cdp enable" on your frame relay interface. On a
frame relay interface it is not on by default. Broadcast is enabled by
default if you use IARP to learn remote IP addresses. You will have to use
the "BROADCAST" keyword if you are using frame-relay map statements.
Hope that helps
John
----- Original Message -----
From: "Elias Aggelidis" <eaggel@algo.com.gr>
To: "Corey M. Ellis" <coreye@odigo.com>; "CCIE Mailist"
<ccielab@groupstudy.com>
Sent: Monday, April 16, 2001 8:26 AM
Subject: RE: CDP on Multipoint FR interfaces!!
> Dear All,
>
> CDP is a broadcast Layer 2 protocol so in order to work on
> a multipoint non broadcast network you have to make some
> maps in you hup and spoke topology.
>
> I have not try but I think that if map bridging on the frame-relay
interface
> and of course enable bridging on this interfaces cdp will work.
>
> In a point to point topology you would not have any problems.
>
> Regards
>
> Elias Aggelidis
>
>
> ****************************************************************
> Elias Aggelidis ALGOSYSTEMS SA
> Senior Network Engineer 4, Sardeon Str
> CCNA, CCNP Nea Smyrni
> CVOICE, Security Specialised
> PICA Administrator
> Athens 17121
> tel: +301-9310281 GREECE
> fax: +301-9352873
> email: eaggel@algo.com.gr
> ****************************************************************
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Corey
> M. Ellis
> Sent: S?__at?, 14 ?p?????? 2001 7:01 55
> To: CCIE Mailist
> Subject: CDP on Multipoint FR interfaces!!
>
>
> Hi all,
>
> when I do a show cdp neigh on my frame connected routers "spokes are
> physical, and hub is multipoint" I don't get anything. CDP is on by
default,
> and I even manually enabled it, still nothing. One spoke as a router
> connected to it via another serial connection and that is fine. I must be
> missing something about CDP not working on multipoint frame connections.
On
> the CD it says that CDP works on LAN, Frame, ATM interfaces. Please
advise.
>
> thanks
>
> Corey M. Ellis
> **Please read:http://www.groupstudy.com/list/posting.html
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