colinardo
Jul 10, 2021, updated at Aug 26, 2021 (UTC)
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RouterOS 7.1beta6 - GRE Tunnel does not work with non Mikrotik devices (fix)

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Small advice for all users trying to create a simple GRE Tunnel to a non Mikotik device under the current beta version.

If the tunnel does not come up, disable the keepalive setting for the tunnel interface. This is a proprietary Mikrotik implementation which does not work with other common GRE tunnel implementations.

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Hope this helps.

Best regards
@colinardo
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Content-ID: 965439970

Url: https://rootdb.com/knowledge/routeros-7-1beta6-gre-tunnel-does-not-work-with-non-mikrotik-devices-fix-965439970.html

Printed on: March 26, 2025 at 11:03 o'clock

1 Comment
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aqui
aqui Jul 21, 2021 updated at 10:57:34 (UTC)
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Thanks for this feedback !
Added this advice to the GRE_Tunnel_Tutorial as well.
Btw. Cisco supports a GRE keepalive too but did NOT recommend to use it, cause of some major protocol drawbacks:
https://www.cisco.com/c/en/us/support/docs/ip/generic-routing-encapsulat ...
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