Simple routing issue

Unanswered Question
Jul 9th, 2010
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Hi All


I've configured a network with PE's and CE's what I have is EIGRP running between PE's and EBGP between PE and CE's. can't reach router loopback address of other CE's. Routing on the PE's works to all locations without a problem. I have DMVPN running between PE's but this is'nt impacting the routing in anyway because the PE's can reach other and all LAN and loopback subnets.


Between CE and PE i redistribute EIGRP into BGP and BGP into EIGRP.


The problem seems to be the routing between CE-CE.


Exampls


ping from


CE1-CE3

CE-1-CE2


from CE-1 pinging loopback 192.168.3.1

from CE-1 pinging loopback 192.168.10.1


All other routing works well.


Can anyone point me in the right direction configurations attached,


All i need is to have full routing from the CE's. I don't know why the PE's are dropping packets destined for other CE's.


Please find configs attached.

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Chetan Kumar Ress Sun, 07/11/2010 - 11:33
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Hi Carl


Here the senario that you post i think you are trying to run VRF-Lite over the PE's.


You have configured TEST_VRF1 for Cust & configured same VRF for DMVPN Tunnel. althrough  should i consider that you want to run  Excrypted traffic of that customer over PE's.


Here in you tunnel config please check :


interface Tunnel1
ip vrf forwarding TEST_VRF1
ip address 192.168.4.1 255.255.255.0
no ip redirects
ip mtu 1532
no ip next-hop-self eigrp 90
ip nhrp map multicast dynamic
ip nhrp network-id 123
no ip split-horizon eigrp 90
tunnel source FastEthernet1/0
tunnel mode gre multipoint
tunnel protection ipsec profile Secure_Tunnel


interface FastEthernet1/0
description *** Link to Core Switch ******
ip address 192.168.2.26 255.255.255.0
duplex auto
speed auto


Tunnel source is fa1/0 & That tunnel is in VRF , But the source traffic is in Global routing table. So i think that it will not work , Config you VRF to use global routing table so that the tunnel source will work properly .


Note : I have not simulated the senario . But still in overview i think is can be issue. Please check


Regards

Chetan Kumar

Mohamed Sobair Sun, 07/11/2010 - 07:22
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Carl,


In order for the PE to import all CE routes which was previously learned by bgp between the PE-CE, you will still need bgp between the PEs rather than Eigrp or any other routing protocol .


The fact is that the Route-targets are only carried by BGP protocol with the extended community, your redistribution between Eigrp and BGP will not carry those route targets and would thefore not carry the routes.


I suggest you have a VPNv4 session between all your PEs . This should solve your problem.


Another question is that why do you have DMVPN between PEs rather than your CEs?





HTH

Mohamed

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