VPN module in Cisco VPN router bandwidth consumption

[arumugasamy]

Team,

one of my customer in banking sector got 100 MB bandwidth MPLS link from local ISP connected to the edge VPN router which has vpn module Installed.

Customer wants to know the exact bandwidth consumed by vpn module . Also wants to measure the bandwidth utilization in real time

Can anyone help me

Thanks

sami 

[Vasilii Mikhailovskii]

Hello.

What do you mean "bandwidth consumed by VPN module"?

If you meant IPSec overhead, then

1) You may try "sh crypto engine accelerator statistic" and check counters before/after encryption.

2) In theory, you may expect the overhead on single packet of about 70-100 bytes (dependent on the encryption algorithm and tunnel mode), you may gather statistics of mean packet size (on the router) and calculate overhead in percentage.