Re: Layer 3 and 2 question. [7:69576]

2003-05-27 Thread Peter van Oene
At 08:19 AM 5/28/2003 +0800, Nuurul Basar wrote:
>I was amming to get both Core and dist running on L3, thus a thought off two
>network device having the same IP was no in.  My design was rejected by the
>Project Mgr, due this this reason.  Since my customer won't be running DHCP,
>so some one can used the IP in another switch.  I have seen the L3 config
>done in another site with DHCP, and so far it works fine.  I also have to
>disable STP and lets routing take over, using OSPF.

Ok.  It sounds a bit like you might have an ISP network that connects to 
multiple different customers?  I am trying, but failing to understand what 
it is you are trying to do :-)

Pete



>- Original Message -
>From: "Peter van Oene" 
>To: 
>Sent: Wednesday, May 28, 2003 2:51 AM
>Subject: Re: Layer 3 and 2 question. [7:69576]
>
>
> > At 03:05 PM 5/27/2003 +, Nuurul Basar wrote:
> > >I am planning to configured both my core and distributions as L3 device,
>and
> > >let the access switch to distribution using L2.
> > >I was advice that by doing this on my network two identical ip address
on
> > >same subnet/vlan but in a different access switch can exist.
> > >And a packet that is attend to a host in the different switch might end
>up
> > >in the else where.  Is this real?.
> >
> > I'm not entirely sure what you are trying to accomplish here?  Do you
> > actually require multiple devices to share single IP addresses?  I have
> > only seen that used for things like DNS query handling (stateless
> > udp).  Haven't seen it used anywhere else.
> >
> > >Sorry, but I have never think off this before.
> > >
> > >Thanks
> > >
> > >Nuurul Basar Mohd Baki
> > >Network Engineer
> > >DDSe




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RE: Layer 3 and 2 question. [7:69576]

2003-05-27 Thread Larry Letterman
That's incorrect and as others have said, it's a bad idea..


Larry Letterman
Cisco Systems




-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Nuurul Basar
Sent: Tuesday, May 27, 2003 8:06 AM
To: [EMAIL PROTECTED]
Subject: Layer 3 and 2 question. [7:69576]


I am planning to configured both my core and distributions as L3 device,
and let the access switch to distribution using L2. I was advice that by
doing this on my network two identical ip address on same subnet/vlan
but in a different access switch can exist. And a packet that is attend
to a host in the different switch might end up in the else where.  Is
this real?.

Sorry, but I have never think off this before.

Thanks

Nuurul Basar Mohd Baki
Network Engineer
DDSe




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Re: Layer 3 and 2 question. [7:69576]

2003-05-27 Thread Peter van Oene
At 03:05 PM 5/27/2003 +, Nuurul Basar wrote:
>I am planning to configured both my core and distributions as L3 device, and
>let the access switch to distribution using L2.
>I was advice that by doing this on my network two identical ip address on
>same subnet/vlan but in a different access switch can exist.
>And a packet that is attend to a host in the different switch might end up
>in the else where.  Is this real?.

I'm not entirely sure what you are trying to accomplish here?  Do you 
actually require multiple devices to share single IP addresses?  I have 
only seen that used for things like DNS query handling (stateless 
udp).  Haven't seen it used anywhere else.

>Sorry, but I have never think off this before.
>
>Thanks
>
>Nuurul Basar Mohd Baki
>Network Engineer
>DDSe




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Re: Layer 3 and 2 question. [7:69576]

2003-05-27 Thread Robert Edmonds
I'm not sure I understand the question correctly, but I do know that it is
never a good idea to duplicate IP addresses on your network.  This can only
lead to trouble.  My advice would be, don't do it.

""Nuurul Basar""  wrote in message
news:[EMAIL PROTECTED]
> I am planning to configured both my core and distributions as L3 device,
and
> let the access switch to distribution using L2.
> I was advice that by doing this on my network two identical ip address on
> same subnet/vlan but in a different access switch can exist.
> And a packet that is attend to a host in the different switch might end up
> in the else where.  Is this real?.
>
> Sorry, but I have never think off this before.
>
> Thanks
>
> Nuurul Basar Mohd Baki
> Network Engineer
> DDSe




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