Re: RIP V1 VLSM

Actually all disregard my last post :)
Labbed it up exactly and saw this:

R1#
RIP: sending v1 update to 255.255.255.255 via Serial0/0.12 (10.1.0.1)
RIP: build update entries - suppressing null update
R1#

R2#
RIP: sending v1 update to 255.255.255.255 via Serial0/0.21 (10.1.0.2)
RIP: build update entries - suppressing null update

----------------

If a /24 mask is used instead of the /16 between R1 & R2, it changes things:

RIP: sending v1 update to 255.255.255.255 via Loopback0 (10.2.0.1)
RIP: build update entries
        subnet 10.1.0.0 metric 1
        subnet 10.3.0.0 metric 2

R1#sh ip ro rip
     10.0.0.0/24 is subnetted, 5 subnets
R 10.3.0.0 [120/1] via 10.1.0.2, 00:00:06, Serial0/0.12

Gotta love RIPv1.

Regards
Roy

On 16 February 2010 17:46, Tony Schaffran (GS)
<groupstudy_at_cconlinelabs.com>wrote:

> I am not sure. This is not what I would expect of RIPv1.
>
> Maybe somebody with a more technical answer can chime in.
>
> As this has not been a topic of the CCIE blueprint for some time now and I
> have not come across this in an actual network for even longer, I just do
> not have any more knowledge of it.
>
> Sorry.
>
> Tony Schaffran
> Sr. Network Consultant
> CCIE #11071
> CCNP, CCNA, CCDA,
> NNCDS, NNCSS, CNE, MCSE
>
> CCOnlineLabs
> Your #1 choice for online Cisco rack rentals.
>
>
> From: Sarad [mailto:tosara_at_gmail.com]
> Sent: Tuesday, February 16, 2010 9:42 AM
> To: groupstudy_at_cconlinelabs.com
> Cc: Nadeem Rafi; Cisco certification
> Subject: Re: RIP V1 VLSM
>
> Hi tony,
>
> But as it is a contiguous network it should advertise /16 isnt it? . I
> initially thought it should also advertise /24 :(. I am trying to catch
> what
> happen with the debug but it doesnt show much pls share if you can capture
> anything on debug which shows why it is not advertising.
>
> Sara
> On Tue, Feb 16, 2010 at 11:05 PM, Tony Schaffran (GS)
> <groupstudy_at_cconlinelabs.com> wrote:
> Interesting. I would not even expect the /16 to be advertised, but it is
> as
> you describe.
>
> Also as you describe, the /24 definitely does not get advertised.
>
> Tony Schaffran
> Sr. Network Consultant
> CCIE #11071
> CCNP, CCNA, CCDA,
> NNCDS, NNCSS, CNE, MCSE
>
> CCOnlineLabs
> Your #1 choice for online Cisco rack rentals.
>
>
> From: Sarad [mailto:tosara_at_gmail.com]
> Sent: Tuesday, February 16, 2010 9:31 AM
> To: groupstudy_at_cconlinelabs.com
> Cc: Nadeem Rafi; Cisco certification
>
> Subject: Re: RIP V1 VLSM
>
> Yes I have set it up, as per theory of RIP as it is a contiguous network
> (10
> range) it should send it. When the loopback is a /16 it sends the loopbacks
> but when I change it to /24 it doesnt send it. So is this a illustration of
> RIPV1 does not support VLSM ?
>
>
> On Tue, Feb 16, 2010 at 10:39 PM, Tony Schaffran (GS)
> <groupstudy_at_cconlinelabs.com> wrote:
> I do not think RIPv1 will be sending /16
>
> RIPv1 is classless and 10.x.x.x is /8
>
> Have you configured this in a lba to see for yourself?
>
> Tony Schaffran
> Sr. Network Consultant
> CCIE #11071
> CCNP, CCNA, CCDA,
> NNCDS, NNCSS, CNE, MCSE
>
> CCOnlineLabs
> Your #1 choice for online Cisco rack rentals.
>
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Nadeem Rafi
> Sent: Tuesday, February 16, 2010 8:53 AM
> To: Sarad
> Cc: Cisco certification
> Subject: Re: RIP V1 VLSM
>
> you will not be able to see /24 as rip v1 will be sending /16 major network
> only.
>
> HTH
>
> On Tue, Feb 16, 2010 at 7:39 PM, Sarad <tosara_at_gmail.com> wrote:
>
> > Hi Expert,
> >
> > If I have the following scenario, that is two routers connected back to
> > back
> > with a 10 range /16 ip & there are two loopbacks configured on each
> router
> > with the same class IPs. If I run RIPV1 on this. Will it advertise my
> > loopbacks to each other.
> >
> > R1
> > R2
> > S0 - 10.1.0.1/16 <---------------------------> S0 -10.1.0.2/16
> > L0 - 10.2.0.1/24 L0 -
> 10.3.0.1/24
> >
> > Regards
> > Sara
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
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>

-- 
Regards
Roy
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