Weird, RSVP-TE is down with directly peer, no route

[Vadim Semenov]

Hi, all,

i met with a really strange issue. I have 2 directly connected routers: R3-R1 and i try to setup RSVP-TE tunnel to R3, but R1 shows that next hop of his neighbor is unknow.

R1#sh mpls traffic-eng tunnels tunnel 13

Name: R1_t13 (Tunnel13) Destination: 3.3.3.3
Status:
Admin: up Oper: down Path: not valid Signalling: Down
path option 1, type explicit R1-R3

Config Parameters:
Bandwidth: 0 kbps (Global) Priority: 7 7 Affinity: 0x0/0xFFFF
Metric Type: TE (default)
AutoRoute: enabled LockDown: disabled Loadshare: 0 bw-based
auto-bw: disabled

Shortest Unconstrained Path Info:
Path Weight: UNKNOWN
Explicit Route: UNKNOWN
History:
Tunnel:
Time since created: 4 minutes, 16 seconds
Number of LSP IDs (Tun_Instances) used: 7
Path Option 1:
Last Error: PCALC:: Explicit path has unknown address, 150.1.13.3

RSVP has been enabled.

R1#sh ip rsvp interface
interface rsvp allocated i/f max flow max sub max VRF
Et0/1 ena 0 7500K 7500K 0
Et0/2 ena 0 7500K 7500K 0

ip explicit-path name R1-R3 enable
index 10 next-address 150.1.13.3

R1#sh cdp neighbors

Device ID Local Intrfce Holdtme 
Sw3 Eth 0/0 174 R S I 
R3 Eth 0/2 172 R 

This network is directly attached

R1#sh ip cef 150.1.13.3 detail
150.1.13.3/32, epoch 0, flags attached
Adj source: IP adj out of Ethernet0/2, addr 150.1.13.3 F1C0B760
Dependent covered prefix type adjfib cover 150.1.13.0/24
attached to Ethernet0/2

What can be wrong i don't know...

[Philip D'Ath]

Does the other router definitely have RSVP enabled?

[Vadim Semenov]

Hi, Philip,

actually yes, rsvp has been enabled

R3#sh ip rsvp interface
interface rsvp allocated i/f max flow max sub max VRF
Et0/0 ena 0 7500K 7500K 0
Et0/1 ena 0 7500K 7500K 0
Et0/2 ena 0 7500K 7500K 0
Tu13 ena 0 0 0 0

R3#sh ip cef 1.1.1.1
1.1.1.1/32
nexthop 150.1.13.1 Ethernet0/2

[Adam Vitkovsky]

Do you have the below configured please?

ip cef

mpls traffic-eng tunnels

router ospf 0

mpls traffic-eng router-id Loopback0

mpls traffic-eng area 0

[Vadim Semenov]

Hi, Adam,

i've found the issue - i used a notepade for writing commands and #mpls traffic-eng tunnels command wasn't applied on R3 router. That why ospf dosn't generate LSA10 about their loopback and directly connected networks.

This command can help me.

R3#show mpls traffic-eng tunnels summary
Signalling Summary:
LSP Tunnels Process: not running, disabled
Passive LSP Listener: not registered with RSVP
RSVP Process: running
Forwarding: disabled
Head: 1 interfaces, 0 active signalling attempts, 0 established
0 activations, 0 deactivations
0 SSO recovery attempts, 0 SSO recovered
Midpoints: 0, Tails: 0
Periodic reoptimization: every 3600 seconds, next in 0 seconds
Periodic FRR Promotion: Not Running
Periodic auto-bw collection: every 300 seconds, next in 0 seconds

[Adam Vitkovsky]

I knew it :)

Yeah most of the times it’s one of these three “traffic-eng” commands that’s missing somewhere.

Glad it works now

adam