[j-nsp] RSVP Fast Reroute Node Protection

[Harry Reynolds]

Thanks Kari, you appear correct. I was looking at a config that did not match the topo in my head. Sorry for the mis-info.  

Regards



-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Kari Asheim
Sent: Thursday, July 30, 2009 3:10 PM
To: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] RSVP Fast Reroute Node Protection

On Thu, Jul 30, 2009 at 02:15:04PM -0700, Harry Reynolds wrote:

> I think that you only need to configure the rsvp interface 
> <interface-name> link-protection statement on the lsp's protection 
> paths. That is to say, if the primary path exits a transit node on 
> fe-0/1/1, and you want that node to provide link or link-node 
> protection for that LSP, you would add the link-protection statement 
> to some other rsvp/mpls enabled interface that is not Fast 
> Ethernet-0/1/1. Adding the statement to the lsp's primary path 
> interfaces should have no ill effect, but obviously no gain as the 
> primary and link protection interfaces now share the same fate.

I think you need to configure rsvp interface <> link-protection on the links of the primary path. A very simple example, link-protecting a one-hop LSP:

ka at m320-1# run show mpls lsp ingress detail              
Ingress LSP: 1 sessions

10.0.0.5
  From: 10.0.0.4, State: Up, ActiveRoute: 0, LSPname: to-m320-2
  ActivePath:  (primary)
  Link protection desired
  LoadBalance: Random
  Encoding type: Packet, Switching type: Packet, GPID: IPv4
 *Primary                    State: Up
    Priorities: 7 0
    SmartOptimizeTimer: 180
    Computed ERO (S [L] denotes strict [loose] hops): (CSPF metric: 1)
 10.0.1.2 S 
    Received RRO (ProtectionFlag 1=Available 2=InUse 4=B/W 8=Node 10=SoftPreempt):
          10.0.1.2(Label=3)
Total 1 displayed, Up 1, Down 0


ka at m320-1# run show mpls lsp bypass ingress detail       
Ingress LSP: 2 sessions

10.0.0.5
  From: 10.0.0.4, LSPstate: Up, ActiveRoute: 0
  LSPname: Bypass->10.0.1.2
  Suggested label received: -, Suggested label sent: -
  Recovery label received: -, Recovery label sent: 299872
  Resv style: 1 SE, Label in: -, Label out: 299872
  Time left:    -, Since: Thu Jul 30 23:54:23 2009
  Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
  Port number: sender 1 receiver 22134 protocol 0
  Type: Bypass LSP
    Number of data route tunnel through: 1
    Number of RSVP session tunnel through: 0
  PATH rcvfrom: localclient
  Adspec: sent MTU 1500
  Path MTU: received 1500
  PATH sentto: 10.0.2.2 (ge-1/0/9.0) 18 pkts
  RESV rcvfrom: 10.0.2.2 (ge-1/0/9.0) 18 pkts
  Explct route: 10.0.2.2 10.0.3.1
  Record route: <self> 10.0.2.2 10.0.3.1 Total 1 displayed, Up 1, Down 0


ka at m320-1# run show route  10.0.0.5                 

inet.0: 21 destinations, 21 routes (20 active, 0 holddown, 1 hidden)
+ = Active Route, - = Last Active, * = Both

10.0.0.5/32        *[OSPF/10] 00:07:39, metric 1
                    > to 10.0.1.2 via ge-1/1/0.1 ...


ka at m320-1# show protocols rsvp                         
interface ge-1/1/0.1 {
    link-protection;
}
interface ge-1/0/9.0;


Kari
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