EIGRP between routers sitting behind PA site to site VPN

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L2 Linker

EIGRP between routers sitting behind PA site to site VPN

I want to set up a site to site VPN tunnel between PA 3020 and PA 500 to replace existing Cisco equipment. The current equipment is uing EIGRP routing to fail over to VPN from MPLS using 1921 routers. If I put in PAs to handle the VPN traffic in front of the 1921 routers, will the routers still be able to form an EIGRP neighbor and that traffic pass through the VPN tunnel between the Palo Altos?

 

Crude drawing below:

 

 VPN.PNG


Accepted Solutions
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L5 Sessionator

EIGRP makes neighborships—with other routers that share a common subnet so make sure both routers have same subnet.

 

For example, two routers with addresses of 192.168.1.1/24 (range 192.168.1.1–192.168.1.254) and 192.168.1.2/30 (range 192.168.1.1–1921.68.1.2) can form EIGRP neighborship, because each router will think that the neighbor’s IP address is in the same subnet as his subnet.

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L5 Sessionator

Try making the EIGRP neighgborship with the help of unicast hello messages. If I am not wrong we need to user neighbor command. Point the route towards the tunnel interface on both side.

Highlighted
L5 Sessionator

EIGRP makes neighborships—with other routers that share a common subnet so make sure both routers have same subnet.

 

For example, two routers with addresses of 192.168.1.1/24 (range 192.168.1.1–192.168.1.254) and 192.168.1.2/30 (range 192.168.1.1–1921.68.1.2) can form EIGRP neighborship, because each router will think that the neighbor’s IP address is in the same subnet as his subnet.

View solution in original post

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