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Dialup Preformace Issue

I am currently comparing a Windows2000 RAS server to a Cisco dialup solution with a 3825 router, 8port BRI ISDN and 18 MICA Digital Modem card. Preformace testing with a ThinkPad T42 with builtin modem dialing up an ISDN number to the router. Testing was done with IPERF utility, here are the results:

Existing Windoes2000 Server RAS

Connection Speeds: TX=33.6Kbps / RX=?

Modem Settings: v.90/92 and v.44

Client Setup:

Server Type = ppp

Transports = TCP/IP

Authentication = MS-CHAP-v2

Compression = MPPC

PPP Multilink framing = on

iperf utility:

Client download = 2Mbps

Client upload = 1.7Mbps

New C3825 ISDN RAS

Connection Speeds: TX=50.6Kbps/RX=26.4Kbps

Modem Settings: v.90/92 and v.44

Client Setup:

Server Type = ppp

Transports = TCP/IP

Authentication = MS-CHAP-v2

Compression = MPPC

PPP Multilink framing = off

iperf utility:

With MPPC Enabled:

Client download = 760Kbps

Client upload = ? Kbps

No Comp Enabled:

Client download = 119Kbps

Client upload = 68Kbps

I'm not sure if there is a compression issues or what with the 3825. Is is possible that the 3825 is not keeping up with the MPPC compression and would require a AIM-COMPR4 module to help off-load this.

I've attached the router config as well just incase I've missed something.

1 REPLY
Bronze

Re: Dialup Preformace Issue

PPP Multilink seems to be enabled on the windows 2000 RAS server and disabled on the 3825

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