HSRP works at the LAN interface (or sub-interface) level.
The purpose of HSRP is to provide default gateway in the event of router
failure.
Each router has an IP address on an interface and there is a virtual router
(IP address) created between
the two routers, where one is active, the other is standby. This should be
set by a priority statement.
On a LAN segment, there are two routers... ip address 192.168.1.2 and
192.168.1.3. By using the standby commands a virtual router is created
(192.168.1.1) Users specify this as their default gateway.
Since one of these is active, it is routing traffic. There is a hello packet
that is sent from the standby router to the active router, if it doesn't
acknoledge, the standby goes active.
Does that make any sense?
JayMan.
"NetEng" <[EMAIL PROTECTED]> wrote in message
98423i$l2e$[EMAIL PROTECTED]">news:98423i$l2e$[EMAIL PROTECTED]...
> Does HSRP work at the interface level or is the entire router on
> acvtive/stand-by? In other words, if I have two routers working in HSRP
and
> a link goes down somewhere down the line, will the first router know to
> fail-over to the second router (with a good link)? I have one router
> connected to one ISP and a second router connected to a second ISP. Can
> these routers be run in HSRP or must they be running in parallel and let a
> dynamic routing protocol (BGP on the outside and let's say EIGRP on the
> inside) decide? TIA.
>
>
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