My GRE tunnel doesnt comming up

[kamankolie]

hello all i have an issue on my gre tunnel configuration, can some  one help me too solve this please.

see below the config file:

interface Tunnel60030                                                           
 description Tunnel STUB                                           
 bandwidth 2048                                                                 
 ip address 172.24.XX.XX 255.255.255.252                                        
 ip mtu 1400                                                                    
 ip flow ingress                                                                
 ip flow egress                                                                 
 ip tcp adjust-mss 1300                                                         
 keepalive 10 3                                                                 
 tunnel source 192.168.XX.17                                                    
 tunnel destination 192.168.XX.19          

interface Tunnel60040                                                           
 description Tunnel to Kaloum(wimax)                                            
 ip address 172.24.XX.XX 255.255.255.252                                        
 ip mtu 1400                                                                    
 ip flow ingress                                                                
 ip flow egress                                                                 
 ip tcp adjust-mss 1300                                                         
 keepalive 10 3                                                                 
 tunnel source 192.168.XX.19                                                   
 tunnel destination 192.168.XX.17                                    

[brianw2 · Accepted solution]

Are the tunnel source and destination addresses in the same subnet?

[kamankolie]

YES. WITH mask 255.255.255.240

[brianw2]

I would like to do gather more information about your setup so I can troubleshoot. What type of devices are you using? Can you provide me with the running config for the devices that this tunnel is setup on? 

[kamankolie]

site 1 config:

interface Loopback0                                                             
 ip address 172.16.154.4 255.255.255.255                                        
!                                                                                                                            
!                                                                               
interface Tunnel60045                                                           
 description Tunnel to Kaloum(fiber)                                            
 ip address 172.24.90.30 255.255.255.252                                        
 ip tcp adjust-mss 1300                                                         
 keepalive 10 3                                                                 
 tunnel source 192.168.10.20                                                    
 tunnel destination 192.168.10.33                                               
!                                                                               
interface Embedded-Service-Engine0/0                                            
 no ip address                                                                  
 shutdown                                                                       
!                                                                               
interface GigabitEthernet0/0                                                    
 description CONNECTION TO SWITCH                                               
 ip address 10.78.12.1 255.255.255.0                                            
 duplex auto                                                                    
 speed auto                                                                     
!                                                                               
interface GigabitEthernet0/1                                                                                                               
 ip address 192.168.10.20 255.255.255.240                                       
 duplex auto                                                                    
 speed auto                                                                     
!                                                                                                                                                   
!                                                                               
!                                                                               
router eigrp 20                                                                 
 network 10.78.12.0 0.0.0.255                                                   
 network 172.16.154.4 0.0.0.0                                                   
 network 172.24.90.57 0.0.0.0                                                   
 passive-interface default                                                      
 no passive-interface GigabitEthernet0/0                                        
 no passive-interface Tunnel60040                                               
!                            

[yasir shaikh]

hello ...

Dear i would like to do gather more information site2  also here in site 1 seem mtu command is missing.

let me know both site mtu is default or  manualy configure ??