[c-nsp] Difference between ISIS NSR and ISIS NSF Cisco-Style

[Dhamija Amit]

 Hi Olive

I have a one more query with HA mode . can we configure both NSR and NSF together , and if so during switchover which one is triggered first NSR or NSF . 

I have two reasons for going into this deployement approch.

1> If someof my neighbour is not NSF capable or by mistake NSF gracefull config is not enabled or removed from any neighbour.NSR will take care for those neighbours.

2> During testing on CRS with scalability figures ,after switchover  it was taking 4 mins of time to fully sync all the routing information with standby and if there is one more switchover during that time span , NSF can take care.

What do you suggest as best practice deployements for NSR/NSF considering above two points.

Thanks
Amit Dhamija




--- On Tue, 1/15/13, Oliver Boehmer (oboehmer) <oboehmer at cisco.com> wrote:

> From: Oliver Boehmer (oboehmer) <oboehmer at cisco.com>
> Subject: Re: [c-nsp] Difference between ISIS NSR and ISIS NSF Cisco-Style
> To: "Dhamija Amit" <amiitdhamija at yahoo.com>
> Cc: "cisco-nsp at puck.nether.net" <cisco-nsp at puck.nether.net>
> Date: Tuesday, January 15, 2013, 4:40 PM
> Amit,
> 
> >
> >I was testing NSR ( NSF - CIsco) in IOS-XR in GSR and
> CRS , However i am
> >able to see the LSP-DB's syncing in both the routers.
> >
> >RP/0/8/CPU0:cr2.BLB#sh isis checkpoint lsp
> >Tue Jan 15 05:49:21.676 IST
> >
> >IS-IS COLT checkpoint LSPs
> >Level  LSPID         
>         Chkpt ID
> >  2    crs1.BLB.00-00     
>    80002c38
> >  2    cr2.BLB.00-00     
>     80002c18
> >  2   
> dr2.blb-ASR1004.00-00   80002bf8
> >  2    vrr2.BLB.00-00     
>    80002bd8
> >  1   
> SAR3-test7.blb.00-00   80002bb8
> >  1    crs1.BLB.00-00     
>    80002b98
> >  1    cr2.BLB.00-00     
>     80002b78
> >  1   
> pr1.BLB-7206G1.00-00   80002b58
> >  1    dr1.blb:inet.00-00 
>    80002b38
> >  1    cng1.BLB.00-00     
>    80002b18
> >  1    dr1.blb.00-00     
>     80002af8
> >  1    sar4.BLB-re1.00-00 
>    80002ad8
> >  1    sar5.BLB.00-00     
>    80002ab8
> 
> [Š]
> >
> >
> >Just to make sure LSPDB syncing is happening with NSF
> cisco style .Is
> >this something newly added??
> 
> These checkpoints don't replace the database sync triggered
> by the PNSP,
> the router actually only stores the LSP header information
> in those
> checkpoints, which it uses during the sync. It's different
> from a "full"
> NSR solution where all LSP/LSA information would be present
> on the
> restarting RP.
> 
>     oli
> 
>