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New Member

Gre tunnel up/down through ASA

Router->ASA->router

I configured gre interface in both the router. I could ping gre destination ip from both the router. I could see traffic in my ASA firewall for both gre and Icmp. But my gre interface is still down.

I have ASA 5510 wit 8.4 IOS



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7 REPLIES
New Member

Re:Gre tunnel up/down through ASA

I added keep alive 10 3 in both gre config to ensure tunnel status and reachability

New Member

Re:Gre tunnel up/down through ASA

Hi,

Could you please run captures on both interfaces and verify that they are recieving all the packets sent to each other.?

Regards,

~Harry

New Member

Re:Gre tunnel up/down through ASA

Yes I could see GRE packet between two ip in in inside and outside interface of the firewall.
Still the link is up down and configured eigrp I couldn't see neighbour up

New Member

Re:Gre tunnel up/down through ASA

Hi
Could you please share the scrubbed config of your firewall ?

~Harry

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New Member

Re:Gre tunnel up/down through ASA

By default inside to outside permit. Nat is also not required.
No specific config in ASA

I configured below comments

Sysopt connection permit-vpn
Inspect pptp

Provided inbound access for gre and ip




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New Member

Re:Gre tunnel up/down through ASA

Hi harshit
My gre tunnel came up. :-)
All I did applied the below command and reset the tunnel config.

Default interface tunnel90

And I configured the tunnel again. It came up. I configured eigre between the tunnel. I could see the eigrp neighbour.
Thanks for your help


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New Member

Re:Gre tunnel up/down through ASA

Oh Cool!!

congrats.

Regards,

~Harry

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