Hello @ismailsh
You should be able to know the optional parameters that Meraki supports by looking at the BGP open message. I went ahead and configured BGP on 2 MXes and looked at the BGP OPEN message after restarting one from the dashboard and it appears to show that the MX supports and participates in Graceful Restart
![BGP OPEN.png BGP OPEN.png](https://community.meraki.com/t5/image/serverpage/image-id/38761i78080F826898FA9C/image-size/large?v=v2&px=999)
Hopefully this helps!
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