Questions about VPN phases on cisco|
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Posted by Elia S. on February 2, 2010, 5:32 am
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Hello I have a GRE+IPSEC tunnel between two routers HQ C2651XM with AIM VPN EP ios 12.4(15)T9 and C831 12.4(18) phase 1 3des sha group2 phase 2 3des esp sha ----------------------- Question 1) Both the ciscos have 3des/des hardware assisted encryption so I don't get any performance hit using that cyphers. The phase 1 is used only to establish tunnel, right? So if I put for example phase1: aes 256 sha group 5 I just use more cpu cycles at the establishment of the tunnel, but once the tunnel is established I don't have any performance hit? question 2) In a gre+ipsec tunnel is the same, to apply the crypto map on the phisical interface where the tunnel is terminated, or applying the tunnel security ipsec... on the tunnel interface? I think that applying a tunnel security policy on the tunnel, changes the tunnel from GRE to IPSEC tunnel ipv4. right? thank you | |||||||
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