[nsp] switch default gateway question

Tue Jul 15 00:45:31 EDT 2003

yes they are running at layer 3

will the approach i listed they way to deal with this. Please any 
suggestions are sincerely welcomed

regards
seun

>From: Rich Sena <ras at thick.net>
>To: "gab.seun jones.ewulomi" <seun_ewulomi at hotmail.com>
>CC: jjackson at onenet.net, <cisco-nsp at puck.nether.net>
>Subject: RE: [nsp] switch default gateway question
>Date: Mon, 14 Jul 2003 13:24:18 -0400 (EDT)
>
>Are you running these switches at layer-3?  If they're just layer-2 and
>not routing then teh default will only be pertinent to geting to the
>switch for management purposes from a location that is not in the local
>broadcast domain...
>
>On Jul 14, 2003 gab.seun jones.ewulomi spake:
>
> > My apologies if I didnt explain myself properly
> >
> > Basically I want to know how best to approach the situation
> >
> > our switches are going to be changed to a diffirent address range. the
> > switches can accept more than one default gateway.
> > The core routers addresses has to be changed to the same subnet as the
> > switches soon
> >
> > 1)the switch old ip address is was on a 11/8 address pointing to the 
>core
> > router with a 11/8 address
> > 2)now the switch addresses are being changed to a 10/16(subnetted) 
>address
> > and the default gateway has to point to the core witha 10/16 address as 
>well
> >
> > Myu approach was to
> >
> > 1)configure the swith with another default pointing to a 10/16
> > 2)configure a secondary interface on the core with a 10/16 address
> > 3)the other core routers connected to this core will be also given a
> > secondary of 10/16 address
> > 4)then on the core routers put floating statics for all our original 
>routes
> > to point to the default GW 10/16 addresses
> >
> > I presume that because the swithes now have to defalt GW statements that 
>the
> > swith will automatically send packest for pc's of 10 and 11 addresses. 
>While
> > we slowly migrate all our lan devices to the new 10/16 GW
> >
> > 5)will start gradually changing the lan devices to start pointing to the
> > 10/16 GW
> >
> > Please correct me if im thinking of this the wrong way.
> >
> > Any advice will be greatly appreciated
> >
> > regards,
> > seun
> >
> >
> >
> >
> >
> >
> >
> > >From: John Jackson <jjackson at onenet.net>
> > >Reply-To: jjackson at onenet.net
> > >To: "'gab.seun jones.ewulomi'" <seun_ewulomi at hotmail.com>,
> > >cisco-nsp at puck.nether.net
> > >Subject: RE: [nsp] switch default gateway question
> > >Date: Mon, 14 Jul 2003 10:22:54 -0500
> > >
> > >The problem I see is, can a l2 switch have more that one IP address? A
> > >default gateway doesn't work if it doesn't have an IP address on the 
>same
> > >subnet as the default gateway.  So even if you change all your default
> > >gateways you've still have to change your IP address on your switches.
> > >
> > >If I have misunderstood what you plan is, let me know.
> > >
> > >John
> > >
> > >
> > > > -----Original Message-----
> > > > From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> > > > bounces at puck.nether.net] On Behalf Of gab.seun jones.ewulomi
> > > > Sent: Monday, July 14, 2003 9:39 AM
> > > > To: cisco-nsp at puck.nether.net
> > > > Subject: Re: [nsp] switch default gateway question
> > > >
> > > > Hi Scooty,
> > > >
> > > > Let me explain actually why I asked the question.
> > > >
> > > > We are renumbering our ip addresses to a private 10 network.
> > > >
> > > > We have a core router in which all our switches point their default
> > > > gateway
> > > > to.
> > > >
> > > > The swithes are all going to be re-numbered to a 10.20/16 range and 
>will
> > > > have to point to the new default gateway of 10.100.50.1/16(core 
>router
> > >new
> > > > address)
> > > >
> > > > currently the switches are on a 11/8 range and point to a the 
>default
> > > > gateway 11.100.50.1/8(current core router address)
> > > >
> > > > Now what I have to do is to reflect the core router to this change.
> > > >
> > > > What is the best way to approach this.
> > > >
> > > > This is what I think. But I think the diffrent bit mask between the 
>old
> > > > and
> > > > new ip address might be a problem. By the way the routing table is 
>all
> > > > static
> > > >
> > > > 1)configure the switches with another default gateway pointing to 
>the
> > > > 10.100.50.1/16 the 11.100.50.1/8 will be the primary
> > > > 2)create a secondary address on the core router for the new ip 
>address
> > > > 10.100.50.1/16
> > > > 3)on our remote site routers create a floating static entry pointing 
>to
> > > > the
> > > > new default GW 10.100.50.1/16. (Then remove old route when all is 
>well
> > > > later
> > > > on)
> > > > 4)slowly start migrating the PC's on each lan to be pointing to the
> > > > 10.100.50.1/16 GW
> > > >
> > > > Is there a better way to approach this scenario?
> > > >
> > > > please any help and advice will be greatly appreciated
> > > >
> > > > regards,
> > > > seun
> > > >
> > > >
> > > > >From: "gab.seun jones.ewulomi" <seun_ewulomi at hotmail.com>
> > > > >To: cisco-nsp at puck.nether.net
> > > > >Subject: Re: [nsp] switch default gateway question
> > > > >Date: Mon, 14 Jul 2003 12:23:20 +0100
> > > > >
> > > > >Hi people,
> > > > >
> > > > >just answered my own question.
> > > > >
> > > > >Yes you can by using the primary keyword
> > > > >
> > > > >thanks
> > > > >
> > > > >regards,
> > > > >seun
> > > > >
> > > > >
> > > > >>From: "gab.seun jones.ewulomi" <seun_ewulomi at hotmail.com>
> > > > >>To: cisco-nsp at puck.nether.net
> > > > >>Subject: [nsp] switch default gateway question
> > > > >>Date: Mon, 14 Jul 2003 11:47:17 +0100
> > > > >>
> > > > >>Hi People,
> > > > >>
> > > > >>My apologies if this seems somewhat of a silly question.
> > > > >>
> > > > >>Here goes
> > > > >>
> > > > >>On a switch is it possible to have a switch pointing to more than 
>one
> > > > >>default gateway
> > > > >>
> > > > >>
> > > > >>again my apologies
> > > > >>
> > > > >>
> > > > >>regards,
> > > > >>seun
> > > > >>
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>
>--
>Rich Sena - ras at thick.net
>ThickNET Consulting
>"On the way to understanding; you understand, and forget."
>
>

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