cisco 2651XM router with wic1-adsl card
IOS: c2600-ipbase-mz.123-11.T.bin (12Mb)
broadband = bog standard 8Mb adsl on BT line
I've discovered to my dismay my cisco router only gives me half the
broadband speed of a cheap plastic router (Billion 5200G). If I connect
my PC straight to a Billion 5200G adsl router I am getting about
3800kbps download at speedtest.net, and a file download from
microsoft.com came down at about 450Kb/sec.
However if I swap the Billion for my cisco router I only get about
2500kbps at speedtest.net and the same file from MS downloads at approx
290KKB/sec. This is quite a difference and I never expected cisco gear
to give such poor performance - unless I'm doing something wrong that
In testing the cisco I used two different IOS's - a minimal IOS (above)
and a larger IOS with a bare bones running-config (below), no firewalls
or anything and still the speed was slow. Next thing I did was change
the adsl card (I've got two cards) but that made no difference.
Another thing I tried was I took the adsl card out of the cisco router
and configured a route through it out into the Billion router, so
effectively the internet traffic was still going through the cisco
router and the speed was back up to 3800kbps again, which would indicate
the problem is with the WIC1-adsl card. So either these cards aren't
much cop or I haven't configured it correctly.
I duplicated the above test on a second 2651XM router I have and I got
the same results.
Attached is a copy of my running config and a bit extra. If anyone can spot frailties in my config that would affect bradband speed I'd be grateful for any advice.