From: manoj menon (manojmenon123@yahoo.com)
Date: Mon Nov 14 2005 - 12:22:16 GMT-3
Hi Mitchell,
1) Topology HUB and SPOKE . R3=> Hub R4 and R5 => Spoke .
2) Use only Physical interfaces on all the 3 routers
3) Do not use Dynamic mapping ( No Inverse ARP )
4) Do not configure static Layer 3 to Layer 2 Mapping on spokes was later corrected to
mapping between the spokes, ie, static mapping is allowed spoke to the hub.
So, the situation we discuss do not arise in this scenrario.Only during OSPF configuration, you have to tackle it choosing the right ospf network type etc. etc.
The configuration below will work in one case, where you have 'inverse-arp turned on at one end and turned off at other. because, turning off inverse-arp turns the requests off not the ability to reply to inverse-arp -
interface Serial0/0
ip address 163.4.12.1 255.255.255.0
ip pim sparse-mode
encapsulation frame-relay
no fair-queue
frame-relay traffic-shaping
frame-relay interface-dlci 102
frame-relay inverse-arp IP 102
no frame-relay inverse-arp IP 103
no frame-relay inverse-arp IP 104
no frame-relay inverse-arp IP 105
!
R2#
interface Serial0/0
ip address 163.4.12.2 255.255.255.0
ip pim sparse-mode
encapsulation frame-relay
no fair-queue
frame-relay traffic-shaping
frame-relay interface-dlci 201
NO frame-relay inverse-arp IP 201
no frame-relay inverse-arp IP 203
no frame-relay inverse-arp IP 204
Appreciate comments!!
Regards
manoj
"Mitchell, TJ" <tmitchell@allianttech.com> wrote:
I have used the command in this exact scenario before so I know it
works.
Thanks
T.J. Mitchell
-----Original Message-----
From: Skinner, Stephen [mailto:Stephen.Skinner@rbs.co.uk]
Sent: Monday, November 14, 2005 10:11 AM
To: 'manoj menon'; 'Chris Lewis'; Mitchell, TJ; 'Arun Arumuganainar';
'ccielab@groupstudy.com'
Subject: RE: IE Lab Exercise
TJ , chris, manoj
i have just seen this in the CCO about the command "frame-relay
interface-dlci"
This command is typically used for subinterfaces; however, it can also
be
used on main interfaces. Using the frame-relay interface-dlci command on
main interfaces will enable the use of routing protocols on interfaces
that
use Inverse ARP.
from what i have seen here i appologise for my previous comment`s ,
regards
Stephen Skinner
> -----Original Message-----
> From: manoj menon [SMTP:manojmenon123@yahoo.com]
> Sent: 14 November 2005 15:08
> To: Skinner, Stephen; 'Chris Lewis'; 'Mitchell, TJ'; 'Arun
> Arumuganainar'; 'ccielab@groupstudy.com'
> Subject: RE: IE Lab Exercise
>
> *** WARNING : This message originates from the Internet ***
>
>
> Mitchel, Stephen,,
>
> Even on the spokes, just assigning frame-rely interface-dlci will not
help
> any mapping, you got to either turn on 'inverse-arp' or state
'frame-relay
> map' for that dlci....unless you use it under a point-to-point
> sub-interface - off-course, no mapping is required on a p2p
interface.
>
> Regards
> Manoj
>
>
>
> "Skinner, Stephen" wrote:
>
> Also i forgot to say ,
>
> i have been taught that using the fram-relay interface-dlci
command
> assign
> all outbound frames to that DLCI , therefore you have your
mapping ,
>
>
> althought i am beginning to doubt this
>
> steve
>
>
> Stephen Skinner
> > -----Original Message-----
> > From: Skinner, Stephen
> > Sent: 14 November 2005 15:00
> > To: 'Chris Lewis'; Mitchell, TJ; Arun Arumuganainar;
> > ccielab@groupstudy.com
> > Subject: RE: IE Lab Exercise
> >
> > chris,
> >
> > i have always been told as best practise ,
> >
> > if you want to specify a DLCI without using static mapping you
> should use
> > the last command ,
> >
> >
> > i forgot to say that this is for a spoke and not the hub ,
> >
> > i am thinking on the lab , i could leave it out and as you say
,it
> would
> > work , but it would not demonstrate my knowledge of the
subject
> and i
> > believe you would be marked down for that
> >
> > i should have also really added the point-to-multipoint line
to
> the int
> > s0/0
> >
> > P.S
> > i forgot to say that this is for a spoke and not the hub ,
> >
> > cheers
> >
> > Stephen Skinner
> >
> > -----Original Message-----
> > From: Chris Lewis [SMTP:chrlewiscsco@yahoo.com]
> > Sent: 14 November 2005 14:45
> > To: Mitchell, TJ; Skinner, Stephen; Arun Arumuganainar;
> > ccielab@groupstudy.com
> > Subject: RE: IE Lab Exercise
> >
> > *** WARNING : This message originates from the Internet ***
> >
> >
> > I'm sorry TJ, I'm not sure I follow:
> >
> > The config supplied (it did not say for which router) was as
> > follows:
> >
> > int s0/0
> > encap frame-relay
> > no frame-relay inverse-arp
> > ip address 1.1.1.X 255.255.255.252
> > frame-relay interface-dlci 40X
> >
> > What I was trying to point out was the following:
> >
> > 1. All DLCIs are by default assigned to the physical
interface, so
> > the last command here adds nothing over and above what teh
router
> would do
> > if it were not there.
> > 2. with no fram-relay inverse-arp and no manual map
statements,
> > there are no L3 to L2 mappings, so no packets will be sent out
> that
> > interface.
> >
> > You seem to be thinking that turning off inverse-arp will not
> allow
> > the router to assign a DLCI to an interface. This is
incorrect.
> > inverse-arp is about mapping a layer 3 destination to a local
> layer 2
> > address.
> >
> > "Mitchell, TJ" wrote:
> >
> > Chris --
> > R3 is going to use the Frame-relay map command under the
> > physical
> > interface.
> > Next the configuration that was provided for the spokes (by
> > Stephen)
> > will work fine, since you disabled inverse arp on the spokes
> > the DLCI's
> > need to be specified.
> >
> > Using that configuration doesn't configure L3 - L2 mapping
> > on the
> > physical interface for the spokes.
> >
> > Thanks
> >
> > T.J. Mitchell
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]
> > On Behalf Of
> > Chris Lewis
> > Sent: Monday, November 14, 2005 9:10 AM
> > To: Skinner, Stephen; 'Arun Arumuganainar';
> > ccielab@groupstudy.com
> > Subject: RE: IE Lab Exercise
> >
> > Stephen,
> >
> > I don't see how this would help. All DLCI's are assigned to
> > the physical
> > interface by default, so assigning the DLCI with that
> > command here does
> > nothing. Also this is a multipoint interface, so without
> > some layer 3 to
> > layer 2 mapping, no packets are going anywhere.
> >
> > Arun, I believe the IE lab solution guide gives a working
> > config, can't
> > you look at that? From memory I think the OSPF section gives
> > a clue as
> > to how spoke to spoke connectivity is achieved. On the hub
> > you can still
> > use map statements.
> >
> > Chris
> >
> > "Skinner, Stephen" wrote:
> > int s0/0
> > encap frame-relay
> > no frame-relay inverse-arp
> > ip address 1.1.1.X 255.255.255.252
> > frame-relay interface-dlci 40X
> >
> > HTH
> >
> > Stephen Skinner
> >
> >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [SMTP:nobody@groupstudy.com]
> > > Sent: 14 November 2005 11:17
> > > To: ccielab@groupstudy.com
> > > Subject: IE Lab Exercise
> > >
> > > *** WARNING : This message originates from the Internet
> > ***
> > >
> > > Here are conditions .
> > >
> > > 1) Topology HUB and SPOKE . R3=> Hub R4 and R5 => Spoke .
> > > 2) Use only Physical interfaces on all the 3 routers
> > > 3) Do not use Dynamic mapping ( No Inverse ARP )
> > > 4) Do not configure static Layer 3 to Layer 2 Mapping on
> > spokes
> > >
> > > Just wondering How to configure this ?. Any body can throw
> > some light
> > on
> > > it .
> > > It would be great !!!
> > >
> > > Thanks and Regards
> > > Arun
> > >
> > >
> >
> >
>
This archive was generated by hypermail 2.1.4 : Thu Dec 01 2005 - 09:12:06 GMT-3