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Re: MPLS VPN using GRE/IPSEC between PE

  • From: Rajiv Asati <rajiva@cisco.com>
  • Date: Wed, 23 Jul 2003 18:17:44 -0400
  • Cc: mpls-ops@mplsrc.com
  • Resent-Date: Wed, 23 Jul 2003 18:45:55 -0400
  • To: "Luan Nguyen" <uulmnguyen@hotmail.com>
  • X-Sender: rajiva@dingdong.cisco.com

Luan,

Take a look at the "sh ip cef vrf <vrf> <prefix>". Do you see any label 
values ?
Usually, MPLS is required to be configured on the GRE tunnel ?

Do you really want IPSEC between PEs ? WHat's the motivation ?

Cheers,
Rajiv

At 03:50 PM 7/23/2003, Luan Nguyen wrote:
>Hello,
>I have a set up like this: 
>cisco2621A----ethernet/BGP----PE1--------GRE/IPSEC-------PE2----Ethernet
>/BGP---cisco2621C
>running eigrp inside the tunnel to advertise the loopback for the mbgp peers
>PEs = 2651xm running 12.3.1a enterprise 3DES.
> From the CEs, routing table does have route between them - mbgp 
> established and carried routes but i can't ping from sun box behind the 
> one CE to the other sun box behind the other CE.  Traceroute die at the 
> PE. Anyone knows what could be wrong?  do i need to run tag-switching 
> inside the tunnel?
>
>Thanks.
>
>Regards,
>
>--luan
>
>Here are some show routes
>
>2621A#show ip route
>Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
>       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1
>- OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF 
>external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, L1 - IS-IS 
>level-1, L2 - IS-IS level-2, ia - IS-IS inter area
>       * - candidate default, U - per-user static route, o - ODR
>       P - periodic downloaded static route
>
>Gateway of last resort is 192.168.1.1 to network 0.0.0.0
>
>     10.0.0.0/24 is subnetted, 2 subnets
>C       10.242.1.0 is directly connected, FastEthernet0/1
>B       10.242.2.0 [20/0] via 192.168.1.1, 00:27:08
>     192.168.1.0/30 is subnetted, 1 subnets
>C       192.168.1.0 is directly connected, FastEthernet0/0
>S*   0.0.0.0/0 [1/0] via 192.168.1.1
>2621A#show ip int brief
>Interface                  IP-Address      OK? Method Status
>
>Protocol
>FastEthernet0/0            192.168.1.2     YES manual up
>
>up
>FastEthernet0/1            10.242.1.1      YES manual up
>
>up
>2621C#show ip route
>Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
>       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1
>- OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF 
>external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, L1 - IS-IS 
>level-1, L2 - IS-IS level-2, ia - IS-IS inter area
>       * - candidate default, U - per-user static route, o - ODR
>       P - periodic downloaded static route
>
>Gateway of last resort is 192.168.2.1 to network 0.0.0.0
>
>     10.0.0.0/24 is subnetted, 2 subnets
>B       10.242.1.0 [20/0] via 192.168.2.1, 00:23:37
>C       10.242.2.0 is directly connected, Ethernet0/1
>     192.168.2.0/30 is subnetted, 1 subnets
>C       192.168.2.0 is directly connected, Ethernet0/0
>S*   0.0.0.0/0 [1/0] via 192.168.2.1
>
>2651XM1#show ip route vrf customer1
>
>Routing Table: customer1
>Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
>       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1
>- OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF 
>external type 1, E2 - OSPF external type 2
>       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS 
> level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route
>       o - ODR, P - periodic downloaded static route
>
>Gateway of last resort is not set
>
>     10.0.0.0/24 is subnetted, 2 subnets
>B       10.242.1.0 [20/0] via 192.168.1.2, 00:29:08
>B       10.242.2.0 [200/0] via 204.177.181.252, 00:17:55
>     192.168.1.0/30 is subnetted, 1 subnets
>C       192.168.1.0 is directly connected, FastEthernet0/0
>
>2651XM2#show ip route vrf customer1
>
>Routing Table: customer1
>Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
>       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1
>- OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF 
>external type 1, E2 - OSPF external type 2
>       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS 
> level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route
>       o - ODR, P - periodic downloaded static route
>
>Gateway of last resort is not set
>
>     10.0.0.0/24 is subnetted, 2 subnets
>B       10.242.1.0 [200/0] via 204.177.181.253, 00:15:45
>B       10.242.2.0 [20/0] via 192.168.2.2, 00:15:13
>     192.168.2.0/30 is subnetted, 1 subnets
>C       192.168.2.0 is directly connected, FastEthernet0/0
>
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