From: Scott Morris (swm@emanon.com)
Date: Thu Sep 25 2003 - 11:12:02 GMT-3
OSPF Demand Circuit has nothing to do with whether CDP will bring your
circuit up or not! Your definition of interesting traffic defines that.
OSPF demand circuit doesn't define interesting traffic. It makes sure
that even though OSPF >IS< interesting traffic, it won't be constantly
talking to the other side unless something change.
OSPF Demand Circuit suppresses the hello packets (which would be
interesting) and puts routes in the database into a do not age state in
order to keep them happy. And keeps the neighbor connection formed
(part of suppressing hellos).
CDP is still a completely different beast.
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
CISSP, JNCIS, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Nawaz, Ajaz
Sent: Thursday, September 25, 2003 8:58 AM
To: 'Donny MATEO'; Peng Zheng
Cc: ccielab@groupstudy.com; nobody@groupstudy.com
Subject: RE: Should I disable cdp on ISDN
as a reader this is the most complete reply.
as I understand it, OPSF demand circuit is the only time where you would
explicity disable cdp (interface only) in order to prevent an isdn
circuit from coming UP unecessarily.
ajaz
-----Original Message-----
From: Donny MATEO [mailto:donny.mateo@sg.ca-indosuez.com]
Sent: 25 September 2003 08:57
To: Peng Zheng
Cc: ccielab@groupstudy.com; nobody@groupstudy.com
Subject: Re: Should I disable cdp on ISDN
What techology are you refering to ? It really is technology specific
backup interface => no need
static route => make sure you didn't define CDP as interesting traffic
in
the dialer-list (there is no need to turn it off)
ospf demand-circuit => filter it out or turn it off dialer-watch=> no
need i believe..not sure though..
so which one is it are you refering to ?
Donny
Peng Zheng <zpnist@yahoo.com>
Sent by: nobody@groupstudy.com
09/25/2003 03:24 PM
Please respond to Peng Zheng
To: ccielab@groupstudy.com
cc: (bcc: Donny MATEO/ADPC/ASIA/BANQUE_INDOSUEZ/FR)
Subject: Should I disable cdp on ISDN
On page 144 CCIE Practical Studies: Security, it said
cdp triggers the ISDN call and therefore should be
disabled if it isn't needed.
Is that true? SHould I always disable cdp when
configure DDR on ISDN?
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This archive was generated by hypermail 2.1.4 : Wed Oct 01 2003 - 07:24:36 GMT-3