Wow, HSRP!
I'm still Studying it and Some of what your saying is the nature of the way
HSRP works! I'm kinda new at this but if I understand your question right I
think most everything is well with your Config. Look below \/ (Pros please
correct me if there's anything I've gotten wrong, I'd sure like to know
where I missed it. Thanks)
""Kevin Wigle"" <[EMAIL PROTECTED]> wrote in message
008401c05641$84dccde0$[EMAIL PROTECTED]">news:008401c05641$84dccde0$[EMAIL PROTECTED]...
> Hey Group!
>
> After reading Cisco's HSRP on CCO, there is still something that is not
> clear.
>
> At the moment I have a situation where there are 2 routers, configured for
> HSRP.
2 routers gives you redundancy...
>
> So, each has a prime ip address and three secondary addresses which are
all
> configured with HSRP addresses.
>
> So, to summarize, there are 4 subnets configured.
>
> When I do a "sh arp" on RtrA, - all HSRP addresses show the same virtual
mac
That's right! This allows the node to gain access to the Back Up router when
the Primary Route fails. That's why it's Virtual! If it were literal the
Node would have to know when the route went down and reconfigure itself with
the new route. Not very practical...
>
> subnets for RtrB (in RtrA's arp table) are different.
>
> 2 subnets appear as "incomplete" and the other two show up with the bia of
> the interface.
Not sure what this means...Sorry
>
> At the moment RtrA is the active router.
>
> So my question is this..... does the standby router use it's own bia?
(while
> on standby?)
>
> and, what does "incomplete" mean in the arp table?
>
> Also an interesting observation.............
>
> The HSRP addresses are configured on hosts as the default gateway.
The HSRP is a virtual IP and MAC address which points to your primary and
backup routers. What's really a mind bender is the fact that in a big enough
LAN with several Subnets you could be using Backups as Primaries on opposite
Subnets! Check out the BCMSN by Cisco Press on HSRP pg 259.
>
> When you ping the HSRP address, it responds ok.
Exactly what it should do...
>
> But when I do a traceroute to another network through the gateway, the
> physical address is shown in the trace, not the HSRP address. Could this
not
> be a bit confusing??
Not really. When you ping an IP your looking for a static response. When You
Tracert your tracing the hops from the devices themselves! Have you tried to
ping the rtA and rtB Real IP addresses to see what you get? You should be
able to ping them as well. What your getting with the Virtual or HSRP
address is a response from the Primary (rtA) router saying here I am.
Because you've config'd it to do so... I hope this helps and if I'm wrong on
any of this let me know, I'm anxious to see what the PROs have to comment on
this!
>
> Kevin Wigle
>
>
>
> _________________________________
> FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
