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Cisco ASA - configure backup L2L tunnels on backup Internet link

Posted on 2016-11-07
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Last Modified: 2016-11-14
We have a core network that has L2L tunnels with several spokes. Several spokes are 8.4 or higher and one spoke is 8.2.5.

The core has a backup Internet link -- let's call it Backup. Goal is to maintain L2L tunnels to the spokes if the primary internet on the core goes down.

On the core side, I've configured NAT to the (inside,Backup), and an access list to allow Backup_access_in.

On the spoke side, I've configured additional tunnel groups to the Backup on the Core. What else is required? Additional crypto maps?
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Question by:d4nnyo
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max_the_king earned 500 total points
ID: 41878326
Hi,
yes, on the spokes you need to add crypto map as well, not only tunnel groups.
Please note that you can add the backup public IP into each crypto map that already exists for the main site.
For example, on each spoke:
old crypto map:
crypto map outside_map 20 set peer 1.2.3.4
new crypto map:
crypto map outside_map 20 set peer 1.2.3.4 5.6.7.8

hope this helps
max
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by:d4nnyo
ID: 41879303
Thanks. Is it better to re-creat existing crypto maps? Or add new ones?
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Expert Comment

by:max_the_king
ID: 41879306
It must be The same crypto map. You may as well update the existing one.
max
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