From: Schulz, Dave (DSchulz@dpsciences.com)
Date: Thu Feb 22 2007 - 17:54:27 ART
No, the helper addresses will allow you to direct broadcasts for say, DHCP. Pixie, etc for startup. The directed broadcast would relate to allowing directed broadcast out od the interface. Afaik, as it was explained to me.. Hope this helps.
Dave Schulz
*** Sent from my Blackberry ***
-----Original Message-----
From: Anthony Bonilla <anthonybonilla.ccie@gmail.com>
To: Schulz, Dave
CC: ccielab@groupstudy.com <ccielab@groupstudy.com>
Sent: Wed Feb 21 22:40:32 2007
Subject: Re: Helper address and directed broadcast Question
Dave,
Thanks for your response - I was beginning to think that my messages were not making it to the GS but now I feel a lot better after you replied.
In any event, just to make sure that I got it: if you look at my depiction of the setup, if we were asked to enable HSRP on the LAN interface of Router R1 and use LAN broadcast address between Routers R3 and R4. In that case, are you saying that I should enable helper address on the LAN interfaces of both R1 and R4 and don't need to enable directed broadcast on either of the interfaces (I thought that I had to have directed-broadcast enabled on R4's LAN interface and would only enable helper address on R1's LAN interface so that the traffic is directed towards the LAN segment between R and R4)? Pls elaborate a bit, if at all possible. Thanks again for taking the time to respond.
Tony
On 2/21/07, Schulz, Dave <DSchulz@dpsciences.com> wrote:
Anthony -
You will want to enable the ip helper on both routers that are acting as
the hsrp group. The ip helper will provide the directed broadcast.
HTH.
Dave Schulz,
Email: dschulz@dpsciences.com
-----Original Message-----
From: nobody@groupstudy.com <mailto:nobody@groupstudy.com> [mailto:nobody@groupstudy.com] On Behalf Of
Anthony Bonilla
Sent: Wednesday, February 21, 2007 9:12 PM
To: ccielab@groupstudy.com <mailto:ccielab@groupstudy.com>
Subject: Re: Helper address and directed broadcast Question
Any takers? Can someone pls answer the following question because I
have
tried searching archives but hasn't been able to find a definitive
answer as
yet? Would appreciate someone's help with this.
Thx.
On 2/19/07, Anthony Bonilla <anthonybonilla.ccie@gmail.com> wrote:
>
> Hello GS,
>
> First of all, I would like to apologize for asking this basic (for
some on
> this group) question but I have this doubt in my mind for some time
now and
> wanted to see if someone from this group can help me understand this
> concept. If we enable HSRP on a router for users connected to one of
it's
> LAN interfaces (LAN interface of router R1 in the below presentation)
and
> then use broadcast address of another router's LAN segment (say, LAN
> interface between R3 and R4) as the address for IP HELPER ADDRESS
command,
> where would I need to worry about enabling directed broadcast?
>
> LAN --- R1 --- Serial --- R2 --- Serial --- R3 ---- LAN ---- R4
>
> Also, if someone would be kind enough to let me know if I need to
enable
> broadcast support at all if the helper address is, let's say, R4's
> LAN interface address?
>
> I look forward to your response to this question.
>
> TIA,
>
> Tony.
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