[j-nsp] Fwd: RSVP/MPLS question - Answered

[Amos Rosenboim]

Hi all,

I Wanted to share with you the solution that worked for me in this case.
The solution was provided through this list by Mr. Alexander Tarkhov,  
whom I am very thankful to.

The root cause of my problem was that I have tried to set up the LSPs  
across multiple OSPF areas.
What I did not know is that TE information is not exchanged between  
areas.

I followed Alexanders advice and disabled CSPF for those LSP that  
cross multiple OSPF areas, and now all LSP are up.

Regards

Amos


Begin forwarded message:

> From: Amos Rosenboim <amos at oasis-tech.net>
> Date: February 2, 2007 10:50:29 PM IST
> To: juniper-nsp at puck.nether.net
> Subject: RSVP/MPLS question
>
> Hi,
>
> I'm trying to enable MPLS in a small service provider network.
> The network consists of 4 M10i routers, and 1 ERX router.
> The ERX is out of the scope for the moment, and first stage was to  
> configure RSVP and MPLS on the M series routers, and to create a  
> full mesh of LSP.
> The topology is described in the below drawing:
>
> R1-----3 X E1------R2------Ethernet (VLAN on a GigE interface)------ 
> R3----------T3------------R4
>
>
>
> All is working well between R4, R3, and R2.
>
> However, all LSP from R1, except for the one to R2 are down.
> The failed LSP at R1 shows:
> CSPF failed: no route toward 217.69.0.4[4873 times]
>
> While:
> oasis at M10i-THESS1-re0> show route 217.69.0.4
>
> inet.0: 126 destinations, 131 routes (126 active, 0 holddown, 0  
> hidden)
> + = Active Route, - = Last Active, * = Both
>
> 217.69.0.4/32      *[OSPF/150] 1d 11:16:33, metric 5, tag 0
>                       via e1-1/3/0.0
>                     > via e1-1/3/2.0
>                       via e1-1/3/4.0
>
> inet.3: 108 destinations, 109 routes (108 active, 0 holddown, 0  
> hidden)
> + = Active Route, - = Last Active, * = Both
>
> 217.69.0.4/32      *[OSPF/150] 1d 10:17:08, metric 5, tag 0
>                     > via e1-1/3/0.0, label-switched-path To-ATH
>
>
> Also, RSVP is acting very strange over the 3 X E1 lines between R1  
> and R2.
> First, when we configured all 3 E1 for RSVP, only two neighbors  
> came up. After few clear RSVP session commands the third neighbor  
> came up.
> Then, there are only active RSVP sessions between R1 and R3 and R4,  
> only with R2.
>
> Then we disabled RSVP on 2 of the E1 lines and stayed with just  
> one, but R2 still showed 3 RSVP neighbors. Their idle time increase  
> but they are staying "up" although RSVP is no longer configured on  
> those interfaces.
> When tracing RSVP on R2 we also get:
>
> Feb  1 12:05:35.602215 RSVP error, send to DISABLED interface?  
> Hello New 217.69.0.149->217.69.0.150 Len=8 e1-0/3/2.0
> Feb  1 12:05:59.356492 RSVP recv PathErr 217.69.0.134->217.69.0.133  
> Session preempted LSP TO-THESS-FROM-ATH(12/44544)
> Feb  1 12:05:59.356646 RSVP PathErr to client PathErr 217.69.0.134- 
> >217.69.0.133 Len=144
> Feb  1 12:06:10.635236 RSVP error, send to DISABLED interface?  
> Hello New 217.69.0.145->217.69.0.146 Len=8 e1-0/3/1.0
> Feb  1 12:06:35.617397 RSVP error, send to DISABLED interface?  
> Hello New 217.69.0.149->217.69.0.150 Len=8 e1-0/3/2.0
> Feb  1 12:07:10.650408 RSVP error, send to DISABLED interface?  
> Hello New 217.69.0.145->217.69.0.146 Len=8 e1-0/3/1.0
> Feb  1 12:07:35.632545 RSVP error, send to DISABLED interface?  
> Hello New 217.69.0.149->217.69.0.150 Len=8 e1-0/3/2.0
> Feb  1 12:08:10.665565 RSVP error, send to DISABLED interface?  
> Hello New 217.69.0.145->217.69.0.146 Len=8 e1-0/3/1.0
> Feb  1 12:08:31.729494 RSVP recv PathErr 217.69.0.134->217.69.0.133  
> Session preempted LSP TO-THESS-FROM-ATH(12/44544)
> Feb  1 12:08:31.729601 RSVP PathErr to client PathErr 217.69.0.134- 
> >217.69.0.133 Len=144
> Feb  1 12:08:35.647708 RSVP error, send to DISABLED interface?  
> Hello New 217.69.0.149->217.69.0.150 Len=8 e1-0/3/2.0
>
>
>
> R2 is running :
> Model: m10i
> JUNOS Base OS boot [7.5R1.12]
> JUNOS Base OS Software Suite [7.5R4.4]
> JUNOS Kernel Software Suite [7.5R4.4]
> JUNOS Packet Forwarding Engine Support (M7i/M10i) [7.5R4.4]
> JUNOS Routing Software Suite [7.5R4.4]
> JUNOS Online Documentation [7.5R4.4]
> JUNOS Crypto Software Suite [7.5R4.4]
>
> R1 is running:
> Model: m10i
> JUNOS Base OS boot [7.5R4.4]
> JUNOS Base OS Software Suite [7.5R4.4]
> JUNOS Kernel Software Suite [7.5R4.4]
> JUNOS Packet Forwarding Engine Support (M7i/M10i) [7.5R4.4]
> JUNOS Routing Software Suite [7.5R4.4]
> JUNOS Online Documentation [7.5R4.4]
> JUNOS Crypto Software Suite [7.5R4.4]
>
>
>
> All the documentation i could find refers to the cspf no route  
> error message of the LSP as there is really no route, however, in  
> this case it seems that there is a route.
>
>
> I'm suspecting it's either something with the  3 x E1 connection,  
> or RSVP issue, but I can't really fix it.
>
> Any help will be welcomed.
>
>
> Amos Rosenboim
> CTO
> amos at oasis-tech.net
>
> www.oasis-tech.net
>
>
>