From: Erick (erickbe@xxxxxxxxx)
Date: Fri Mar 24 2000 - 18:34:50 GMT-3
Eric,
CDP is Cisco propiertary and the equipment you're
placing the ISDN call to may not be cisco thus it has
no clue what CDP is and may choke when it see's CDP
packets. Real World Example, Cisco-Bay PPP link. The
Bay added a route to the routing table because it saw
a CDP packet when there was no dynamic routing
protocol configured on the interface. I've also ran
into issues with other vendors.
Erick
CCNP-Security+NetRanger, NNCSS, CCIE lab soon.
--- Eric Lemmons <ericlemmons@yahoo.com> wrote:
> In the following legacy DDR config, I have a few
> questions.
> First, the "no cdp enable".
> Why has this command been put here? Will cdp
> traffic, at layer 2, cause any problems with
> ISDN?
> Second, on the spids. I know it's optional to put
> the LDN at the end of the spid. What are the
> considerations here? I notice some configs have
> the LDN and some don't.
> Third, the ip ospf demand-circuit command. I have
> recently been renting time on the fatkid.com
> internet lab site. The information there
> indicates that you will need this command on both
> sides of the link, no matter what the various
> books or documentation says. I went through one
> of the fatkid.com lab scenarios, and put the
> command on both ends of the link and it seemed to
> work. Perhaps someone can enlighten me a little
> more on this.
> Thanks!
> Eric
>
> interface BRI0
> ip address 137.20.224.6 255.255.240.0
> encapsulation ppp
> no ip route-cache
> ip ospf demand-circuit
> no ip mroute-cache
> bandwidth 64
> isdn spid1 81049306220101 4930622
> isdn spid2 81049306230101 4930623
> dialer map ip 137.20.224.5 name r5 broadcast
> 4930624
> dialer-group 1
> no cdp enable
> ppp authentication chap
> !
>
> =====
> (James) Eric Lemmons
> 615-834-9952 CELL 615-364-5818
>
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