From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Tue Jan 04 2005 - 22:08:44 GMT-3
Andy,
Cisco is not going to give you OS related questions in the R&S
lab that require you to know if a certain OS supports some sort of
feature.
If the task stated that the hosts do support redundant default
gateways, then of course the solution would lean toward using the DHCP
solution since that appears to be what they are looking for by making
that statement.
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
-----Original Message-----
From: Edwards, Andrew M [mailto:andrew.m.edwards@boeing.com]
Sent: Tuesday, January 04, 2005 4:04 PM
To: Brian Dennis; ccie2be; ccielab@groupstudy.com
Subject: RE: dhcp default-router vs hsrp [bcc][faked-from]
Ok... So if they're unix based hosts... Can they accept multiple default
gateways based on availability?
I honestly don't know....
andy
-----Original Message-----
From: Brian Dennis [mailto:bdennis@internetworkexpert.com]
Sent: Tuesday, January 04, 2005 3:08 PM
To: ccie2be; ccielab@groupstudy.com
Subject: RE: dhcp default-router vs hsrp [bcc][faked-from]
Tim,
If I was the proctor and you asked me that question I would just
tell you to choose the best solution because there is no clarity needed
in that task. Here's why. The task didn't say anything about what type
of hosts are in the VLAN so you can't be certain that they will accept
two default gateways via DHCP. This means that the ONLY solution you
can be certain will work for all possible hosts would be HSRP.
Remember to choose the best solution with the information given.
Don't try to outthink the question and don't add a bunch of "what if's"
to the question. You'll drive yourself crazy thinking of solutions if
you do.
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccie2be
Sent: Tuesday, January 04, 2005 1:51 PM
To: marvin greenlee; ccielab@groupstudy.com
Subject: Re: dhcp default-router vs hsrp [bcc][faked-from]
Hi Marvin,
Thanks for your response.
Given the difference in funtionality between these 2 methods, is it your
opinion that in the lab,
if all that is specified is the need for redundancy, we should be bias
towards using hsrp?
Thanks again, Tim
----- Original Message -----
From: "marvin greenlee" <marvin@ccbootcamp.com>
To: "'ccie2be'" <ccie2be@nyc.rr.com>; <ccielab@groupstudy.com>
Sent: Tuesday, January 04, 2005 4:45 PM
Subject: RE: dhcp default-router vs hsrp [bcc][faked-from]
> With DHCP, if multiple default routers are provided, it is up to the
host
to
> determine the availability of the gateway, and, if necessary, switch
to
the
> next default. Depending on the hosts' functionality, it may not
properly
> determine the availability.
>
> By configuring HSRP, you can remove the responsibility for determining
> availability from the host, and let the routers do the work.
>
> - Marvin Greenlee, CCIE#12237, CCSI# 30483
> Network Learning Inc
> marvin@ccbootcamp.com
> www.ccbootcamp.com (Cisco Training)
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> ccie2be
> Sent: Tuesday, January 04, 2005 1:22 PM
> To: Group Study
> Subject: dhcp default-router vs hsrp [bcc][faked-from]
> Importance: Low
>
> Hi guys,
>
> In IE lab 13, task 12.3, the requirement was to provide redundancy for
dhcp
> clients on a given lan segment -
>
> "The default gateway for these hosts should be R6. If R6 is down, R3
should
> be the default gateway."
>
> My immediate thought was to use the dhcp command, default-router <R6's
addr>
> <R3's addr>.
>
> But, the SG shows HSRP being configured instead.
>
> My question is in the real lab, if there's a similar requirement,
would
> either
> approach be acceptable?
>
> I acknowledge that using hsrp is probably better for a couple of
reasons -
> faster switchover, works with all hosts - but
>
> if I used the default-router command, is that wrong?
>
> TIA, Tim
>
>
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