06-13-2009 11:48 AM
I'm working on scenario mentioned in file attached:
R3 and R4 are PE routers, C1 and C2 are CE routers, rest are P-routers. OSPF is running in the core IGP. RSVP and MPLS tunnels are configured on all intermdiate interfaces.
150.1.3.3/32 and 150.1.4.4/32 are loopbacks of R3 and R4 and BGP peering is between loopbacks.
Problem is when I'm configuring explicit path (R3-R1-R2-R5-R4) in tunnel at R3, traffic is not passing between C1 and C2 thought tunnels are up. I noticed that MPLS forwarding table in R3 is showing Untagged in outgoing label for 150.1.4.4 prefix.
Similar setup is working fine if i configure dynamic tunnels (dynamic path is R3-R1-R2-R4) and I see Pop tag is showing as outgoing label for 150.1.4.4 prefix.
Attached file has tunnel and explicit path config, output of sh mpls forwarding and sh mpls traffic-eng tunnels.
Thanks
Sourabh
06-13-2009 12:04 PM
06-13-2009 05:33 PM
Sourabh,
Could you please attach a "show ip cef vrf
Regards
06-13-2009 10:41 PM
R3(config-if)#do sh ip cef vrf VPN 10.1.8.8 255.255.255.255
10.1.8.8/32, version 10, epoch 0
0 packets, 0 bytes
tag information set
local tag: VPN-route-head
fast tag rewrite with
Recursive rewrite via 150.1.4.4/32, tags imposed {23}
via 150.1.4.4, 0 dependencies, recursive
next hop 150.1.4.4, Tunnel0 via 150.1.4.4/32
valid adjacency
tag rewrite with
Recursive rewrite via 150.1.4.4/32, tags imposed {23}
R3(config-if)#
I see only MPLS TE tag imposed and not MPLS VPN label.
Regards
Sourabh
06-14-2009 06:49 AM
Sourabh,
Could you please post the configuration for both PEs (R3 and R4).
Regards
06-14-2009 07:59 AM
06-30-2009 09:19 PM
On R3, this is what you have-
router bgp 1
no bgp default ipv4-unicast
bgp log-neighbor-changes
neighbor 10.1.37.3 remote-as 2
....
....
address-family ipv4 vrf VPN
neighbor 10.1.37.7 remote-as 2
neighbor 10.1.37.7 activate
.....
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