Need help configuring a tunnel interface (basic mpls with rsvp)

[admin_2]

I am trying to configure a tunnel interface with a specific destination. Even though that destination is reachable (I can ping it) I get the output below. "Path not valid... destination IP address not found."

Can anybody shed some light on why this is?

-------------

cisco7206#show mpls tr tun

Name: cisco7206_t0 (Tunnel0) Destination: 1.0.0.1

Status:

Admin: up Oper: down Path: not valid Signalling: Down

path option 1, type dynamic

Config Parameters:

Bandwidth: 0 kbps (Global) Priority: 7 7 Affinity: 0x0/0xFFFF

Metric Type: TE (default)

AutoRoute: disabled LockDown: disabled Loadshare: 0 bw-based

auto-bw: disabled

History:

Tunnel:

Time since created: 2 hours, 7 minutes

Path Option 1:

Last Error: PCALC:: Destination IP address, 1.0.0.1, not found

cisco7206#

[tyossef]

Hi,

This may be due to a number of things, chief among them config problems. How does your tunnel config look like? Do you have RSVP configured along the path? How does

show mpls traffic-eng topology look like? I cannot tell from only this show command output what the problem could be, hopefully others can...

Thanks,

--tamrat

[#3]

Hi. My tunnel config is (the tunnel dest is 1.0.0.2, not 1.0.0.1 as shown in my original post):

------------

!

interface Tunnel0

ip unnumbered Loopback0

tag-switching ip

tunnel destination 1.0.0.2

tunnel mode mpls traffic-eng

tunnel mpls traffic-eng autoroute announce

tunnel mpls traffic-eng path-option 1 dynamic

end

-----------

I have rsvp configured all along the path.

The show mpls tr top looks like:

-------------------------

cisco7206#show mpls tr top

My_System_id: 99.99.99.99, Globl Link Generation 2

Signalling error holddown: 10 sec

IGP Id: 99.99.99.99, MPLS TE Id:99.99.99.99 Router Node

link[0 ]:DR Intf Address: 1.0.0.1, gen:2

frag_id 0, Intf Address:1.0.0.1

TE metric:1, IGP metric:1, attribute_flags:0x0

physical_bw: 100000 (kbps), max_reservable_bw_global: 10000000 (kbps)

max_reservable_bw_sub: 0 (kbps)

Global Pool Sub Pool

Total Allocated Reservable Reservable

BW (kbps) BW (kbps) BW (kbps)

--------------- ----------- ----------

bw[0]: 0 10000000 0

bw[1]: 0 10000000 0

bw[2]: 0 10000000 0

bw[3]: 0 10000000 0

bw[4]: 0 10000000 0

bw[5]: 0 10000000 0

bw[6]: 0 10000000 0

bw[7]: 0 10000000 0

link[1 ]:DR Intf Address: 2.0.0.1, gen:2

frag_id 1, Intf Address:2.0.0.1

TE metric:1, IGP metric:1, attribute_flags:0x0

physical_bw: 100000 (kbps), max_reservable_bw_global: 10000000 (kbps)

max_reservable_bw_sub: 0 (kbps)

Global Pool Sub Pool

Total Allocated Reservable Reservable

BW (kbps) BW (kbps) BW (kbps)

--------------- ----------- ----------

bw[0]: 0 10000000 0

bw[1]: 0 10000000 0

bw[2]: 0 10000000 0

bw[3]: 0 10000000 0

bw[4]: 0 10000000 0

bw[5]: 0 10000000 0

bw[6]: 0 10000000 0

bw[7]: 0 10000000 0

cisco7206#

-------------------

[tyossef]

Hi,

Ok, so you have RSVP configured and have enough BW on the tunnels. Could you check if you are propagating TE info into OSPF/ISIS? Is 1.0.0.2 one or more hops away? Could you do a traceroute to 1.0.0.2? And also do a show mpls interfaces?

I do not see anything wrong thus far, but perhaps one of the things I am asking you for here will uncover the problem.

Thanks,

--tamrat

[#5]

I have made some progress. The original problem seems to have been a bandwidth problem. Now, when I give the command "debug ip rsvp all" I get:

---------------

sco7206#

cisco7206#

cisco7206#

*Mar 24 01:00:43.734: RSVP-API 99.99.99.99_443->1.0.0.2_1[0.0.0.0]: Failed to cr

eate proxy Path state, reason: Invalid route specification

cisco7206#

------------

repeatedly. Does anybody know what this means? If I do the command "show mpls tr top path tunnel 1"

I get:

---------------------

cisco7206#show mpls tr top path tunnel 1

Query Parameters:

Destination: 1.0.0.2

Bandwidth: 10

Priorities: 5 (setup), 5 (hold)

Affinity: 0x0 (value), 0xFFFF (mask)

Query Results:

Min Bandwidth Along Path: 80 (kbps)

Max Bandwidth Along Path: 100000 (kbps)

Hop 0: 1.0.0.1 : affinity 00000000, bandwidth 100000 (kbps)

Hop 1: 1.0.0.2 : affinity 00000000, bandwidth 80 (kbps)

Hop 2: 1.0.0.2

cisco7206#

----------------

which shows a valid path.

Any help would be appreciated.

[Harold Ritter]

Make sure that you the loopback interface address of the the egress router as the destination address. Also make sure you use the loopback interface for the "mpls traffic-eng router-id" command.

Hope this helps,