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Cisco SRP527W to MikroTik GRE Tunnel

Posted on 2013-11-10
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Last Modified: 2014-02-15
I'm trying to set up a GRE Tunnel from a Cisco SRP527W Router to a Mikrotik RouterBoard.
The Cisco end is head office, whereas the Mikrotik is at a remote site.
The Mikrotik sits behind the ADSL router at the office with all ports for VPN forwarded to it.

As the Cisco SRP has no CLI it's harder to set up than traditional methods.

Cisco:
Tunnel No: 1
Checksum: none
Sequence: None
Key: None
Wan interface: ADSL
Destination I.P: Remote Site WAN
Remote IP Address/Sbunet Mask: 172.20.10.1/29

Mikrotik:
Local address: 172.20.10.2/29
Remote Address: Head Office WAN I.P

The Mikrotik has the I.P address also assigned in the I.P > Addresses list and is assigned to the GRE tunnel interface.
On the Mikrotik I have created a NAT Masquerade rule to point the Head Office Subnet.

From the Mikrotik, pinging the 172.20.10.1 only shows a timeout...

Any ideas where I may have missed something???
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Question by:kiwistag
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Expert Comment

by:vyaradaikin
ID: 39722177
Is it still actual?
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Author Comment

by:kiwistag
ID: 39722258
No luck as of yet...
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Author Comment

by:kiwistag
ID: 39802587
The issue between sites is at one end the Netcomm NBPlus6Wn ADSL router is somehow blocking/interfering with the GRE tunnel. I am looking into why this may be as all NAT rules are in that should be..
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kiwistag earned 0 total points
ID: 39848518
After contacting Netcomm they suggested just switching the Router to Bridge Mode. Am yet to try but it seems like the only option.
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Author Closing Comment

by:kiwistag
ID: 39861163
An option to resolve was offered by one of the routers manufacturers after they checked it with their engineers.
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