From: Scott Morris (swm@emanon.com)
Date: Wed Aug 16 2006 - 13:34:28 ART
The DHCP server just passes information, it doesn't do any sort of
verification like that. It's up to the clients (if there are multiple
choices) to decide which way to go and that's usually decided based on ARP
failure.
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Paul
Dardinski
Sent: Wednesday, August 16, 2006 10:10 AM
To: Cisco certification
Subject: RE: DHCP Default Gateway
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
>
>
This archive was generated by hypermail 2.1.4 : Fri Sep 01 2006 - 15:41:57 ART