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Problem with MPLS VPN over TE:

Hi all,

I am having some problem with my topo MPLS VPN over TE

topo hoi cisco.png

This is my topo. I built a MPLS vpn between R5 and R4. This VPN is ok, R4 and R5 can ping each other. After that, i creat a TE tunnel to route traffic start in R1, which have destination in R3 go through R2 ( path: R1-R2-R3 ); TE tunnel up and operation nomally but R4 and R5 can't ping each other anymore.

And this is my configuration:

hostname R1

ip vrf os

rd 1:1

route-target export 1:1

route-target import 1:1

bgp next-hop Loopback11

mpls traffic-eng tunnels

interface Tunnel1

ip unnumbered Loopback1

mpls ip

tunnel destination 33.33.33.33

tunnel mode mpls traffic-eng

tunnel mpls traffic-eng autoroute announce

tunnel mpls traffic-eng priority 1 1

tunnel mpls traffic-eng bandwidth 100

tunnel mpls traffic-eng path-option 1 explicit name LSP

no routing dynamic

!

interface Tunnel2

ip unnumbered Loopback2

tunnel destination 22.22.22.22

tunnel mode mpls traffic-eng

tunnel mpls traffic-eng autoroute announce

tunnel mpls traffic-eng priority 1 1

tunnel mpls traffic-eng bandwidth 100

tunnel mpls traffic-eng path-option 1 explicit name LSP1

no routing dynamic

!

interface Loopback1

ip address 1.1.1.1 255.255.255.0

ip ospf network point-to-point

!

interface Loopback2

ip address 12.12.12.12 255.255.255.0

ip ospf 1 area 0

!

interface Loopback11

ip address 11.11.11.11 255.255.255.0

ip ospf network point-to-point

!

interface FastEthernet1/0

ip vrf forwarding os

ip address 10.1.15.1 255.255.255.0

duplex auto

speed auto

!

interface FastEthernet1/1

ip address 10.1.12.1 255.255.255.0

ip ospf cost 10

duplex auto

speed auto

mpls ip

mpls mtu 1512

mpls traffic-eng tunnels

ip rsvp bandwidth 256 256

!

interface FastEthernet2/0

ip address 10.1.13.1 255.255.255.0

duplex auto

speed auto

mpls ip

mpls mtu 1512

mpls traffic-eng tunnels

ip rsvp bandwidth 256 256

!

router ospf 1

mpls traffic-eng router-id Loopback11

mpls traffic-eng area 0

router-id 1.1.1.1

log-adjacency-changes

network 0.0.0.0 255.255.255.255 area 0

!

router bgp 1

no synchronization

bgp log-neighbor-changes

neighbor 3.3.3.3 remote-as 1

neighbor 3.3.3.3 update-source Loopback1

no auto-summary

!

address-family vpnv4

neighbor 3.3.3.3 activate

neighbor 3.3.3.3 send-community extended

exit-address-family

!

address-family ipv4 vrf os

redistribute connected

redistribute static

no auto-summary

no synchronization

exit-address-family

!

ip classless

ip route 33.33.33.0 255.255.255.0 Tunnel1

ip route vrf os 5.5.5.0 255.255.255.0 10.1.15.5

ip explicit-path name LSP enable

next-address 10.1.12.2

next-address 10.1.23.3

next-address 3.3.3.3

!

ip explicit-path name LSP1 enable

next-address 10.1.12.2

next-address 2.2.2.2

!

hostname R3

ip vrf os

rd 1:1

route-target export 1:1

route-target import 1:1

bgp next-hop Loopback33

!

no ip domain lookup

no ip ips deny-action ips-interface

!

mpls traffic-eng tunnels

interface Loopback3

ip address 3.3.3.3 255.255.255.0

ip ospf network point-to-point

!

interface Loopback33

ip address 33.33.33.33 255.255.255.0

ip ospf network point-to-point

!

interface FastEthernet0/0

no ip address

shutdown

duplex half

!

interface FastEthernet1/0

ip address 10.1.13.3 255.255.255.0

duplex auto

speed auto

mpls ip

mpls mtu 1512

mpls traffic-eng tunnels

ip rsvp bandwidth 256 256

!

interface FastEthernet1/1

ip address 10.1.23.3 255.255.255.0

duplex auto

speed auto

mpls ip

mpls mtu 1512

mpls traffic-eng tunnels

ip rsvp bandwidth 256 256

!

interface FastEthernet2/0

ip vrf forwarding os

ip address 10.1.34.3 255.255.255.0

duplex auto

speed auto

!

!

router ospf 1

mpls traffic-eng router-id Loopback33

mpls traffic-eng area 0

router-id 3.3.3.3

log-adjacency-changes

network 0.0.0.0 255.255.255.255 area 0

!

router bgp 1

no synchronization

bgp log-neighbor-changes

neighbor 1.1.1.1 remote-as 1

neighbor 1.1.1.1 update-source Loopback3

no auto-summary

!

address-family vpnv4

neighbor 1.1.1.1 activate

neighbor 1.1.1.1 send-community extended

exit-address-family

!

address-family ipv4 vrf os

redistribute connected

redistribute static

no auto-summary

no synchronization

exit-address-family

ip route vrf os 4.4.4.0 255.255.255.0 10.1.34.4

hostname R2

mpls traffic-eng tunnels

interface Loopback2

ip address 2.2.2.2 255.255.255.0

ip ospf network point-to-point

!

interface Loopback22

ip address 22.22.22.22 255.255.255.0

ip ospf network point-to-point

interface FastEthernet1/0

ip address 10.1.12.2 255.255.255.0

duplex auto

speed auto

mpls ip

mpls mtu 1512

mpls traffic-eng tunnels

ip rsvp bandwidth 256 256

!

interface FastEthernet1/1

ip address 10.1.23.2 255.255.255.0

duplex auto

speed auto

mpls ip

mpls mtu 1512

mpls traffic-eng tunnels

ip rsvp bandwidth 256 256

!

router ospf 1

mpls traffic-eng router-id Loopback22

mpls traffic-eng area 0

router-id 2.2.2.2

log-adjacency-changes

network 0.0.0.0 255.255.255.255 area 0

hostname R5

interface Loopback5

ip address 5.5.5.5 255.255.255.0

ip ospf network point-to-point

!

!

interface FastEthernet1/0

ip address 10.1.15.5 255.255.255.0

duplex auto

speed auto

!

ip classless

ip route 4.4.4.0 255.255.255.0 FastEthernet1/0

ip route 10.1.34.0 255.255.255.0 FastEthernet1/0

hostname R4

interface Loopback4

ip address 4.4.4.4 255.255.255.0

ip ospf network point-to-point

interface FastEthernet1/0

ip address 10.1.34.4 255.255.255.0

duplex auto

speed auto

ip route 5.5.5.0 255.255.255.0 FastEthernet1/0

ip route 10.1.15.0 255.255.255.0 FastEthernet1/0

please, tell me how to fix that !!!

Everyone's tags (4)
3 REPLIES

Problem with MPLS VPN over TE:

Add the folllowing Configuration on Router-1 and Router-3 Respectively:

R1 Configuration:

router bgp 1

no synchronization

bgp log-neighbor-changes

neighbor 3.3.3.3 remote-as 1

neighbor 3.3.3.3 update-source Loopback1

neigbor 33.33.33.33 remote-as 1

neighbor 33.33.33.33 update-source loopback11

no auto-summary

!

address-family vpnv4

neighbor 3.3.3.3 activate

neighbor 3.3.3.3 send-community extended

neigbor 33.33.33.33 activate

neigbor 33.33.33.33 send-community extended

exit-address-family

!

address-family ipv4 vrf os

redistribute connected

redistribute static

no auto-summary

no synchronization

exit-address-family

|

|

ip vrf os

rd 1:1

route-target export 1:1

route-target import 1:1

bgp next-hop 33.33.33.33

R3 Configuration:

router bgp 1

no synchronization

bgp log-neighbor-changes

neighbor 1.1.1.1 remote-as 1

neighbor 1.1.1.1 update-source Loopback3

neighbor 11.11.11.11 remote-as 1

neighbor 11.11.11.11 update-source Loopback33

no auto-summary

!

address-family vpnv4

neighbor 1.1.1.1 activate

neighbor 1.1.1.1 send-community extended

neigbor 11.11.11.11 activate

neighbor 11.11.11.11 send-community extended

exit-address-family

!

address-family ipv4 vrf os

redistribute connected

redistribute static

no auto-summary

no synchronization

exit-address-family

ip vrf os

rd 1:1

route-target export 1:1

route-target import 1:1

bgp next-hop 11.11.11.11

This Way, all your VPN Traffic Sourced from R5 Will transit the path of the TE tunnel to reach R4.

Regards,

Mohamed

New Member

Problem with MPLS VPN over TE:

Dear Mohamed,

It still not work

Re: Problem with MPLS VPN over TE:

Hi,

Are you able to ping vrf ip's from PE to PE (I mean R1 to R3) because i recreated same in GNS lab and able to ping ip;s

Attaching config of three routers in case if helpful.

Regards

Mahesh

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