[c-nsp] How to bring one link down if another related link goes down

[Phil Mayers]

On 28/09/10 09:47, Peter Rathlev wrote:
> On Mon, 2010-09-27 at 17:12 -0600, John Neiberger wrote:
>> We have two ten gig links between a pair of 7600s. For a couple of
>> reasons, if one goes down we need the other to go down automatically
>> in order to force traffic to take a completely different path instead
>> of trying to cram all of our traffic down the remaining link.
>
> Apart from what others have said, this might also be of some use:
>
> interface TenGigabitEthernet1/3
>   description Primary interface
>   link state group 1 upstream
> !
> interface TenGigabitEthernet1/1
>   description Dependent/secondary interface
>   link state group 1 downstream
> !
> link state track 1

Interesting; what's the feature name for that, and which version of IOS 
does it appear in?