Use of bandwidth IPSEC 3Des
I have 2mbps link we want to enable ipsec 3des on the same if say my 50% of the binding is used at the point and if activate ipsec 3des what bandwidth utilzed after having activated the ipsec.
3662 w/AIM-VPN/HPII - 2mbps link - 3662 w/AIM-VPN/HPII
The answer depends on whether you use 3des to encrypt new traffic currently does not flow on your existing binding, such as the establishment of a new remote site location. If the encrypted traffic is new, it's something extra which does not affect the flow of the current, then you will need to analyze the structure of traffic.
I think that IPsec will add about 50 to 80 bytes for each package, depending on whether it is ah will be used as well as the esp, if WILL be used, and if tunnel mode (new ip headers) must be used too. (Add 24 bytes for AH, 24 bytes for the GRE and 20 bytes for new IP header).
If the IPSec vpn will be used only for existing traffic, instead of new flows, the util link should not increase that much. It is time CPU more bandwidth, and I see that you unloading encrypt cards.
Let me know if you need anything that anyone else.
Tags: Cisco Security
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