From: Peng Zheng (zpnist@xxxxxxxxx)
Date: Sun Aug 25 2002 - 22:50:23 GMT-3
Thanks a lot. I made a mistake. I forgot suppress-map
should use with aggregate.
--- Brian McGahan <brian@cyscoexpert.com> wrote:
> Peng,
>
> You could solve this problem a number of ways.
> However, the
> most obvious solution for this problem is to set the
> community for these
> prefixes to NO-EXPORT. Suppress-map is used for
> suppressing specific
> routes that are part of an aggregate, however you
> could just filter the
> prefixes using a route-map attached to the neighbor
> statement.
>
> HTH
>
> Brian McGahan, CCIE #8593
> Director of Design and Implementation
> brian@cyscoexpert.com
>
> CyscoExpert Corporation
> Internetwork Consulting & Training
> http://www.cyscoexpert.com
> Voice: 847.674.3392
> Fax: 847.674.2625
>
>
> > -----Original Message-----
> > From: Peng Zheng [mailto:zpnist@yahoo.com]
> > Sent: Sunday, August 25, 2002 8:19 PM
> > To: Brian McGahan; ccielab@groupstudy.com
> > Subject: RE: Cyscoexpert Sample Lab
> >
> > Thanks.
> > So if that means R4 can use suppress-map to R2 and
> R1
> > instead of set community for those routes for the
> new
> > question?
> >
> >
> >
> >
> >
> > --- Brian McGahan <brian@cyscoexpert.com> wrote:
> > > Peng,
> > >
> > > See answers inline.
> > >
> > > > -----Original Message-----
> > > > From: nobody@groupstudy.com
> > > [mailto:nobody@groupstudy.com] On Behalf
> > > Of
> > > > Peng Zheng
> > > > Sent: Sunday, August 25, 2002 5:35 PM
> > > > To: ccielab@groupstudy.com
> > > > Subject: Cyscoexpert Sample Lab
> > > >
> > > > Hi,
> > > >
> > > > I have a new question:
> > > >
> > > > For Cyscoexpert Sample Lab, on router 4, we
> set
> > > the
> > > > community to no-export. Do we need to
> configure
> > > > neighbor send-community for route 3?
> > >
> > > You are correct in the assumption that R4 will
> not
> > > send this
> > > community value to any neighbor, including R3.
> > > However, since R3 has no
> > > BGP neighbors besides R4, it wouldn't really
> > > accomplish anything to send
> > > him the community values. Were R3 to have
> another
> > > exit point from the
> > > AS, then it would be appropriate to send the
> > > community values.
> > >
> > > <snip>
> > >
> > > > I have some questions about the configuration
> for
> > > > Cyscoexpert Sample Lab.
> > > >
> > > > First: for question 5 under C.1
> > > >
> > > > 5. R1 should not see a default route from R2.
> > > >
> > > > How has it been implemented?
> > > >
> > > > I think it's implemented by configured area 12
> as
> > > > NSSA.
> > > >
> > > > Am I right?
> > >
> > > Correct. Unlike a stub area, the NSSA ABR will
> not
> > > originate a
> > > default into the NSSA by default (no pun
> intended).
> > > To get the NSSA ABR
> > > to generate a default, the syntax is:
> > >
> > > "area 12 nssa default-information-originate"
> > >
> > > >
> > > > Second: for question 3 under E.3.
> > > >
> > > > 3. The rest of the routing domain should only
> see
> > > one
> > > > route to these network.
> > > >
> > > > I think it has been done by:
> > > >
> > > > ip summary-address eigrp 100 220.1.0.0
> > > 255.255.252.0 5
> > > >
> > > > Am I right?
> > >
> > > Yep.
> > >
> > > > If so, that means when we use ip
> summary-address
> > > eigrp
> > > > command, it will only advertise the summary
> > > adress,
> > > > like summary-only under BGP. Is it right?
> > >
> > > Yep.
> > >
> > > > 3. Why has 0.0.0.0 been used as wildcard-mask
> all
> > > the
> > > > time? What's the advantage?
> > >
> > > The "network" statement in IGP doesn't actually
> > > mean which
> > > networks you are advertising. It means which
> > > interfaces are
> > > participating in the protocol. For example:
> > >
> > > Router EIGRP 1
> > > Network 1.2.3.4 0.0.0.0
> > >
> > > This means that only the interface 1.2.3.4 is
> > > participating in the EIGRP
> > > domain.
> > >
> > > Router EIGRP 1
> > > Network 0.0.0.0
> > >
> > > This means that all interfaces are participating
> in
> > > the EIGRP domain. I
> > > always use 0.0.0.0 for clarity. I suppose it's
> just
> > > a matter of
> > > preference.
> > >
> > > HTH
> > >
> > > Brian McGahan, CCIE #8593
> > > Director of Design and Implementation
> > > brian@cyscoexpert.com
> > >
> > > CyscoExpert Corporation
> > > Internetwork Consulting & Training
> > > http://www.cyscoexpert.com
> > > Voice: 847.674.3392
> > > Fax: 847.674.2625
> > >
> > >
> >
> >
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