[c-nsp] Rate limiting questions

[Bruce Robertson]

I believe it's the incoming traffic that's the problem... the standby 
interface will happily accept traffic on its real IP.

Bruce Robertson, President/CEO                           +1-775-348-7299
Great Basin Internet Services, Inc.    company-wide fax: +1-775-348-9412
http://www.greatbasin.net                       my efax: +1-775-201-1553



Ian Cox wrote:
> At 08:33 PM 10/26/2007 +0100, Phil Mayers wrote:
>   
>> On Fri, 2007-10-26 at 13:08 -0500, Justin Shore wrote:
>>     
>>> Phil Mayers wrote:
>>>       
>>>>> Is there a HSRP option to tell the standby router to only route traffic
>>>>> when it's active?  VRRP and GLBP would have the same problem I imagine.
>>>>>           
>
> What exactly do you mean by not route traffic? HSRP on the standby 
> does not route traffic for the HSRP vmac, it drops the traffic on the 
> floor. If it did not do this when you have a unicast flood packet 
> both switches would forward the packet and have duplicate packets. 
> Then you have the case of the end station using the real interface of 
> the standby router instead of the vmac and that still a valid 
> requirement to need to forward frames.
>
>
> Ian
>
>   
>>>> No. This is a frequently requested feature.
>>>>         
>>> I think I'll ping my account team to add my voice to the list.  This
>>> seems like an awfully easy feature addition to me.  I can't think of any
>>>       
>> At first hearing it does indeed seem easy. Having put some thought into
>> why Cisco don't offer this (fairly obvious) feature, I've concluded
>> there are some non-trivial difficulties doing it in the fully general
>> cases that HSRP can support, and on some forwarding architectures.
>>
>>
>>     
>>> downside to doing it either.
>>>
>>> Justin
>>>       
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