site to site IPsec VPN with redundancy link

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Feb 25th, 2009
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I have 2 site to setup IPSec VPN, both sites have 2 Internet connections.One site is ASA8.0, and the other is PIX7.2.

I want to setup 2 VPN tunnel to backup each other, the route part I think I can use oject tracking to do the redundacy, but on the VPN configuration, I am confusing about the following 2 different setup:

1.

#Primary

crypto map FWMAP 10 match address 101

crypto map FWMAP 10 set peer 192.168.6.2


#Secondary for backup

crypto map FWMAP 20 match address 101

crypto map FWMAP 20 set peer 192.168.6.5


2.

crypto map xxxmap 10 ipsec-isakmp

crypto map xxxmap 10 match address A_2_B

#Primary peer

crypto map xxxmap 10 set peer 10.1.1.1 !--ISP1

#Secondaru peer for backup

crypto map xxxmap 10 set peer 192.168.1.1 !--ISP2


It seems bother configuration should work? What is the differnce between them?

Not quite how the multi set peer command work, and configuration guide didn't explain that too.

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auraza Thu, 02/26/2009 - 12:54
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  • Cisco Employee,

#1 would not work as the ACLs are the same, and it will keep trying to bring that up, and will never hit sequence 20.


#2 may work, but it will be tricky with failover - it would be best to lab it up, and see if you have any problems with various failover scenarios. Make sure you have your keepalives (DPDs) set to delete as soon as a failure is detected.

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