[j-nsp] RSVP/MPLS question

Fri Feb 2 16:02:38 EST 2007

from inet3.0, you only have one interface for the route you mentioned. 
By default, I think it is not load sharing for multiple connections. 
You may check that you enabled multi-path from OSPF. 

If I were you, I would like to add AS  PIC or something, and make 3 T1s as 
MLPPP bundled.
So I can treat all 3 T1 connections as single connection from MPLS 
viewpoint. 

Hyun

Hyunseog Ryu
Senior Network Engineer
Norlight Telecommunications, Inc./Applications Engineering
13935 Bishops Drive
Brookfield, WI 53005 
Phone. +1-262-792-7965
Fax. +1-262-792-7733
Email. hryu at norlight.com

Amos Rosenboim <amos at oasis-tech.net> 
Sent by: juniper-nsp-bounces at puck.nether.net
02/02/2007 02:50 PM

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Subject
[j-nsp] 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

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