08-06-2012 01:04 AM
A multipoint GRE (mGRE) and IPSec tunnel is built between two routers. The topology of the device is briefied below:
Configuration in End Router:
This is a cisco 2811 router. Amoung 2 ethernet interface ,one is using for LAN and one is for WAN. In WAN part , we have configured mGRE (Tunnel1 and Tunnel 2)by creating sub-interface of the router. From the interface ,we terminating the link to MPLS cloud from there its pointing towards our core router.
From End router we are advertising the path through EIGRP and from the cloud BGP advertisied to the core router.
Below is the configuration of the End Router:
crypto ipsec transform-set test esp-3des esp-md5-hmac
mode transport
!
crypto map yesbank 10 ipsec-isakmp
set peer 192.168.80.2
set transform-set test
match address 110
crypto map yesbank 20 ipsec-isakmp
set peer 192.168.80.142
set transform-set test
match address 120
!
interface Loopback0
ip address 192.168.60.6 255.255.255.255
!
interface Tunnel1
description *** CONNECTED TO DAKC PRIMARY ROUTER ***
bandwidth 4000
ip address 10.28.0.2 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip tcp adjust-mss 1436
load-interval 30
delay 2000
tunnel source Loopback0
tunnel destination 192.168.60.1
!
interface Tunnel2
description <<<Connected to DAKC Secondary Router>>>
bandwidth 3000
ip address 10.28.0.154 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip tcp adjust-mss 1436
load-interval 30
delay 3000
keepalive 5 15
tunnel source Loopback0
tunnel destination 192.168.60.35
!
interface FastEthernet0/0
description ***SIFY WIRELESS MPLS LINK ***
bandwidth 2048
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
ip route-cache flow
load-interval 30
speed 100
full-duplex
!
interface FastEthernet0/0.143
description *** SUBINTERFACE FOR SIFY WIRELESS LINK ***
bandwidth 2048
encapsulation dot1Q 143
ip address 192.168.80.34 255.255.255.252
ip flow ingress
ip flow egress
crypto map yesbank
!
interface FastEthernet0/1
description ***BLR LAN***
ip address 10.160.0.3 255.255.252.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip accounting output-packets
ip route-cache flow
speed auto
full-duplex
glbp 1 ip 10.160.0.1
glbp 1 priority 120
glbp 1 preempt
service-policy input YES
access-list 110 permit gre host 192.168.60.6 host 192.168.60.1
access-list 120 permit gre host 192.168.60.6 host 192.168.60.35
Show Tech of the End router also attached . Kindly requesting for the solution ASAP.
08-06-2012 05:43 AM
Hi,
Asuming that crypto & routing are working correctly, if I remember correctly you need to specify a tunnel key ("tunnel key" command under interface tunnel configuration) when you are sourcing multiple GRE tunnels from the same source interface (Loopback0 in your example).
So for each tunnel specify a different tunnel key (both ends need to match).
Sent from Cisco Technical Support iPad App
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