From: Alexander Belov (abelov@technoserv.ru)
Date: Mon Sep 17 2007 - 10:02:27 ART
With this scheme, ...
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Donghai Zhang
Sent: Monday, September 17, 2007 4:05 PM
To: Alexander Belov
Cc: ccielab@groupstudy.com
Subject: Re: where to set the default gateway?
the topology may look like this:
---------
| 4506 |
-----------
/ \
/ \
/ \
--------- ----------
3560 1 35602
--------- ----------
| | | |
pc1 pc2 PCs
suppose pc1 in vlan 10 and pc2 in vlan 20,which 3560 acts as the gateway?
+++ Heh, I hope that 3560-1, if Your SVIs there for Vlan's 10 and 20 are set
up and ip routing is on.
I feel I miss something...
if 35602 acts as the getway,should pc1 go through 35601 and then 4506 and
then 35602 and then return along the same route and then back 35601,and
then finally reach pc2?
+++ A-ha,,, here we go... If Your 3560 is L2 with trunks to 4506 and 4506
got svis for both vlans - yes.
That seams to be apparently unresonable. But how to
solve it ? You may set gateway just on 35601,but what about PCs under 35602?
++++ well, use different SVIs (I mean ip's) - then You will have different
GW for PCs on 3560-2.
If You want to have the SAME IP for all PCs You might try play with HSRP on
the 3560s, but You'll need a link between 3560s for that...
http://www.cisco.com/en/US/tech/tk648/tk362/tk321/tsd_technology_support_sub
-protocol_home.html
And only 1 3560 will be Active passing traffic directly to the 4506 at a
time...
Don't they encounter the same situation?
2007/9/17, Alexander Belov <abelov@technoserv.ru>:
>
> Can You draw ? :)
>
> From the bottom story I got You Have 2 (two) distribution layer
> Switches...
> i.e. 2 x 3560...
> Or You are saying You have two 3560s acting as one switch (like a
> cluster)?
> :)
>
> WBR,
> Alex
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Donghai Zhang
> Sent: Monday, September 17, 2007 3:01 PM
> To: Marc La Porte
> Cc: ccielab@groupstudy.com
> Subject: Re: where to set the default gateway?
>
> Maybe I was not telling this clearly. I mean I need one of the 3560s to be
> the gateway of the PCs in the local LAN. No that there are two 3560s,
> which
> one would be proper?
>
> 2007/9/17, Marc La Porte <marc.a.laporte@gmail.com>:
> >
> > You only have to put a default-gateway on a layer 2 switch, so if both
> > 3560s are layer 3 then it's not necessary on there
> >
> > On 9/17/07, Donghai Zhang <zdh1207@gmail.com> wrote:
> > >
> > > Actually the distribute switches will be L3 at this moment. And the
> > > 3560s would be the default gateways of the hosts.The problem is which
> > > 3560 to set ?
> > >
> > > 2007/9/17, Marc La Porte <marc.a.laporte@gmail.com>:
> > > >
> > > > Assuming that the core switch will be L3 and the distribution
> switches
> > > > L2, I would put the SVI on the core switch and the default gateway
> on
> the
> > > > distribution switches
> > > >
> > > > On 9/17/07, Donghai Zhang <zdh1207@gmail.com > wrote:
> > > > >
> > > > > Dear all,
> > > > > I have got a problem recently. Suppose I have two catalyst 3560,
> as
> > > > > distribute switch, one catalyst 4506,as core switch. I need to set
> > > > > default-gateways of those hosts inside local LAN in the
> 3560s.Theploblem is
> > > > > that: in which 3560 should I set the SVI interface? If I set in
> one,
> > > > > then
> > > > > the hosts within the same vlan but connecting to the other switch
> > > > > have to
> > > > > travel to this switch so that they can be servced routing,thus
> > > > > bandwith
> > > > > would be waste.
> > > > > Anyone help me ,thanks advance.
> > > > >
> > > > >
> > > > >
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