Re: HSRP..Standby routers should not know Standby address !

I think the point was to use authentication so if there is 3rd one then it
wont get through

----- Original Message -----
From: "Cisco League" <ciscoleague_at_googlemail.com>
To: "Cisco certification" <ccielab_at_groupstudy.com>
Sent: Monday, August 10, 2009 10:51 PM
Subject: Re: HSRP..Standby routers should not know Standby address !

> guys dont get confused...
>
> "The standby routers should not learn the standby address."
>
> The task is asking for configuration such that the standby IP is not
> learnt
> dynamicaly. All this means is to configure the standby IP address on both
> the active and standby router manually. Normaly if you configure the
> standby
> IP on one router the other router in the same HSRP group will learn it
> dynamically.
>
> Sorted!
>
> Cheers!
>
> On Mon, Aug 10, 2009 at 8:46 PM, Divin Mathew John
> <divinjohn_at_gmail.com>wrote:
>
>> How would that help? U mean to say... u have R1(10.1.1.1)----R2(10.1.1.2)
>> and Standby IP 10.1.1.100 ..now if we make R1 the active router for the
>> HSRP Group. and say Authentication is ON.. wont R2 know wht standby
>> Address is?? will be pre-shared key help in mitigating a security risk of
>> a
>> R3 (a thrid alien router) coming into the Ethernet segment and preempting
>> the current active router R1. ?
>>
>> On Tue, Aug 11, 2009 at 12:16 AM, Mohamed El Henawy <m.henawy_at_link.net
>> >wrote:
>>
>> > Thanks a lot..clear now :)
>> >
>> > ----- Original Message -----
>> > From: kaushalccie patel
>> > To: Mohamed El Henawy
>> > Cc: Cisco certification
>> > Sent: Monday, August 10, 2009 9:19 PM
>> > Subject: Re: HSRP..Standby routers should not know Standby address !
>> >
>> >
>> > This may help....
>> >
>> >
>> > Authentication
>> > The HSRP authentication feature consists of a shared clear-text key
>> > contained within the HSRP packets. This feature prevents the lower
>> priority
>> > router from learning the standby IP address and standby timer values
>> > from
>> > the
>> > higher priority router.
>> >
>> > To configure the HSRP authentication string, use the standby
>> > authentication
>> > string command.
>> >
>> >
>> >
>> >
>> >
>> http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a008
>> > 0094a91.shtml<
>> http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a008%0A0094a91.shtml
>> >
>> >
>> >
>> > -Kaushal
>> >
>> >
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Received on Mon Aug 10 2009 - 22:57:17 ART