Site-toSite GRE Configuration Between Mikrotik And Cisco Router


 
CiscoRouter Configuration:
R1>enable
R1#conf t
R1 (config)# hostname CiscoRouter
CiscoRouter (config)# interface FastEthernet0/0
CiscoRouter (config-if)# ip address 104.10.1.2 255.255.255.252
CiscoRouter (config-if)#no shutdown
CiscoRouter (config-if)#exit
CiscoRouter (config)# interface FastEthernet0/1
CiscoRouter (config-if)# ip address 172.16.2.1 255.255.255.0
CiscoRouter (config-if)# no shutdown
CiscoRouter (config-if)# exit
CiscoRouter (config)# interface tunnel 0
CiscoRouter (config-if)# ip ip address 192.168.1.2 255.255.255.252
CiscoRouter (config-if)# no shutdown
CiscoRouter (config-if)# tunnel source 104.10.1.2
 CiscoRouter (config-if )# tunnel destination 27.10.10.2
CiscoRouter (config-if )#exit
CiscoRouter (config)# ip route 0.0.0.0 0.0.0.0 104.10.1.1
CiscoRouter (config)# ip route 172.16.1.0 255.255.255.0 192.168.1.1



Cisco Router Verification :
 CiscoRouter#sh ip route
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 104.10.1.1 to network 0.0.0.0

     172.16.0.0/24 is subnetted, 2 subnets
S       172.16.1.0 [1/0] via 192.168.1.1
C       172.16.2.0 is directly connected, FastEthernet0/1
     192.168.1.0/30 is subnetted, 1 subnets
C       192.168.1.0 is directly connected, Tunnel0
     104.0.0.0/30 is subnetted, 1 subnets
C       104.10.1.0 is directly connected, FastEthernet0/0
S*   0.0.0.0/0 [1/0] via 104.10.1.1






CiscoRouter#sh int tunnel 0
Tunnel0 is up, line protocol is up
  Hardware is Tunnel
  Internet address is 192.168.1.2/30
  MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation TUNNEL, loopback not set
  Keepalive not set
  Tunnel source 104.10.1.2, destination 27.10.10.2
  Tunnel protocol/transport GRE/IP
    Key disabled, sequencing disabled
    Checksumming of packets disabled
  Tunnel TTL 255
  Fast tunneling enabled
  Tunnel transmit bandwidth 8000 (kbps)
  Tunnel receive bandwidth 8000 (kbps)
  Last input 00:12:16, output 00:12:16, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/0 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     95 packets input, 8040 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     105 packets output, 9112 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out





Mikrotik Route Configuration:

[admin@MikroTik] > ip address add address=27.10.10.2/30 interface=ether1
[admin@MikroTik] > ip address add address=172.16.1.1/24 interface=ether2

[admin@MikroTik] > interface gre add name=tunnel0 local-address=27.10.10.2 remote-address=104.10g .1.2
[admin@MikroTik] > ip address add address=192.16.1.1/30 interface=tunnel0
[admin@MikroTik] > ip route add dst-address=0.0.0.0 gateway=27.10.10.1
[admin@MikroTik] > ip route add dst-address=172.16.2.0/24 gateway=192.168.1.2