[c-nsp] Backup methods in MPLS networks

[Phil Bedard]

The LDP FRR seems to be LSRs acting in liberal retention mode, which  
is in the LDP RFC. The translation in the document is
a little humorous as they call it libertarian mode.   I know Junipers  
operate in liberal retention mode, I'd be surprised if Cisco did not,  
but I'm not 100% sure.   You are just storing all advertised FECs for  
faster installation into the LFIB in the case of a failure between  
adjacent nodes.    Works the same way as an IGP, where you keep  
candidate paths around for faster convergence during a failure.

Didn't read the VPN FRR document.

Phil


On Jan 8, 2007, at 7:28 AM, Kim Onnel wrote:

> Chinese Vendor has these:
>
> LDP FRR:
> http://www.huawei.com/products/datacomm/pdf/view.do?f=60
>
> VPN FRR:
> http://www.huawei.com/products/datacomm/pdf/view.do?f=79
>
> Links From this page:
> http://www.huawei.com/products/datacomm/detailitem/view.do? 
> id=1353&rid=123
>
>
> On 1/8/07, sthaug at nethelp.no <sthaug at nethelp.no> wrote:
>>> I think other vendors have these features, am i right ?
>>
>> *Which* features, specifically?
>>
>> Juniper has something they call "Fast Reroute", which is proprietary.
>> They also have Link Protection, and Link Node Protection, both of
>> which are standardized. All of these require an MPLS backboen with
>> RSVP based TE tunnels.
>>
>> Steinar Haug, Nethelp consulting, sthaug at nethelp.no
>>
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