[c-nsp] Question on HSRT and MST protocol

[Juan Angel Menendez]

         Each HSRP group will use a different "Virtual MAC address'". 
So if you're using different physical interfaces or VLANs in a 
switched environment you can reuse the HSRP group numbers. This is 
useful when you reach the max HSRP group limitation (which varies on 
each platform).

         Within the same interface or VLAN, you have to use different 
HSRP groups for each Virtual IP address.

         Ie:

         Hostname Ra:

         interface xxx 1/1
         standby 1 ip 10.10.10.1
         standby 1 priority 110
         standby 1 preempt
         standby 1 authentication xxxxxx
         standby 2 ip 10.10.10.2
         standby 2 priority 110
         standby 2 preempt
         standby 2 authentication xxxxxx

         interface xxx 1/2
         standby 1 ip 10.20.20.1
         standby 1 priority 110
         standby 1 preempt
         standby 1 authentication xxxxxx
         standby 2 ip 10.20.20.2
         standby 2 priority 110
         standby 2 preempt
         standby 2 authentication xxxxxx

Regards,

At 10:51 07/09/2006, you wrote:

>On Wed, Sep 06, 2006 at 11:29:42PM +0200, coueffe charly wrote:
> > The first point : HSRP.
> >
> > When I use HSRP between two routers I use one group for one virtual IP.
> > I ask me, if I use for example ten VIP, I must create ten groups?
> >
> > hostname Ra
> > ip address a.b.c.253 255.255.255.0
> > standby 1 ip a.b.c.254
> > standby 1 priority 110
> > standby 1 preempt
> > standby 1 authentication xxxxxx
>
>Yes.  You can use numbers from 1 to 255 to label the standby groups:
>
>   standby 2 ip x.y.z.1
>   standby 2 priority 110
>   standby 2 preempt
>   standby 2 authentication fnord
>!
>   standby 3 ip f.g.h.1
>   standby 3 priority 110
>   [...]
>
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