From: Paul Dardinski (pauld@marshallcomm.com)
Date: Wed Aug 16 2006 - 11:10:07 ART
Am I incorrect in assuming that when DHCP gives out two default gates
that only clients capable of accepting two will work? Is there any kind
of internal mechanism built in to the dhcp code that will keep it from
sending a gateway that is down?
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
shha
Sent: Wednesday, August 16, 2006 9:57 AM
To: Scott Morris
Cc: ZeroFlash; Guzman, Chris; ccielab@groupstudy.com
Subject: Re: DHCP Default Gateway
I tried the solution. but the dhcp pool always give the client the first
config IP as default router even the interface is down.
So I think the task ask you set up the priority for R1 in VRRP, and use
the
virtual IP as default-router in the dhcp pool.
Correct me if wrong.
On 8/16/06, Scott Morris <swm@emanon.com> wrote:
>
> While the use of multiple "default router" commands IS a working
solution,
> it also involves the workstation deciding if/when to switchover and
that
> is
> not a fast failover solution. VRRP would be the primary choice (IMHO)
for
> transparent failover to the users, and the least interruption possible
> given
> that HSRP is not allowed.
>
> HTH,
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
JNCIE
> #153, CISSP, et al.
> CCSI/JNCI-M/JNCI-J
> IPExpert VP - Curriculum Development
> IPExpert Sr. Technical Instructor
> smorris@ipexpert.com
> http://www.ipexpert.com
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> ZeroFlash
> Sent: Wednesday, August 16, 2006 6:58 AM
> To: 'Guzman, Chris'; ccielab@groupstudy.com
> Subject: RE: DHCP Default Gateway
>
> I would look at the question, does it state configure DHCP or VRRP or
> IRDP?
> You said it states to configure DHCP only and have multiple gateways.
This
> can happen with DHCP so I would say that the answer is your second
choice
> rather than your first choice of VRRP.
>
> That's just my opinion.
>
> ZeroFlash
> CCIE #16217
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Guzman, Chris
> Sent: Wednesday, August 16, 2006 1:11 AM
> To: ccielab@groupstudy.com
> Subject: DHCP Default Gateway
>
> I have a task that requires configuring a DHCP lease for a subnet.
> There is a stipulation that for the default gateway, if R1 is down,
then
> R2 should be the default gateway. I am not allowed to use HSRP.
>
>
>
> VRRP seems like a good solution, using the physical address of R1 as
the
> VRRP address for the DHCP pool.
>
>
>
> ip dhcp pool pool1
>
> default-router R1 (VRRP)
>
>
>
> Would it also be acceptable to just to include a second address in the
> dhcp
> pool such as
>
>
>
> ip dhcp pool pool1
>
> default-router R1 (x.x.x.x) R2 (x.x.x.x)
>
>
>
> Thanks
>
>
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