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Pre-shared key max length

tmagnien
Community Member

Hello,

I need to establish an IPSec tunnel between two routers :

- 7206 with VAM

- 2651XM with AIM-VPN.

I'm using pre-shared keys for IKE and everything is OK when using a key length below 64 characters.

I need (well, my customer does) at least 120 characters for key length.

The only info that I could get is here :

http://www.cisco.com/en/US/products/sw/netmgtsw/ps4748/products_user_guide_chapter09186a00801a0b5e.html#98071

It states that "If a CPE device in your network uses a VPN Acceleration Module (VAM) card, you must change the pre-shared key length to 64 characters or less for all CPE devices in the same VPN to interoperate."

Where does this limitation come from and has it been solved ?

Tnahks in advance

1 Reply 1

umedryk
Level 11
Level 11

In this scenario, since it is not required for more than 64 bit key, it is mentioned in that way.