I am experiencing some strange behaviour: I had a 826 router on an ADSL circuit running Internet access and VPN. The download speed of unencrypted Internet traffic is as expected. Over the time the crypto performance of the 826 did not meet my requirements anymore, so I replaced it with an 1802 to gain crypto performance.
I configured both routers basically the same and it works.
But: The performance of the 1802 downloading even clear text traffic is very bad. I get about 1Mbit/s when using the 826 but never more than 100Kbit/s with the 1802.
I already replaced the 1802 with a different model (so it is not a HW problem) and there are no obvious errors at the ATM interface or in the log.
This is the ATM part of the config, same on both:
no ip address
ip tcp adjust-mss 1452
no atm ilmi-keepalive
dsl operating-mode auto
hold-queue 224 in
interface ATM0.1 point-to-point
ip address X.X.X.X 255.255.255.0
ip access-group 101 in
ip access-group 102 out
ip nat outside
ip inspect internet-out out
crypto map vpn
The differences in the rest of the config are only device dependent.
Does anybody know about SW issues causing this?