ArmstrongInt
asked on
Cisco 1841 Bottleneck
Hi All
We recently upgraded to a 50Mbit internet connection. A basic topology is this.
50Mbit FibreLLink --> Cisco 1841 --> Cisco ASA 5510 ---> Network Switch
If I plug a laptop (with IP of Cisco 1841) into the fibre link and run a speedtest (I am based in the UK) so I use the following.
http://www.speedtest.bbmax.co.uk/, http://www.1024.co.uk/speedtest/speedtest4.php
I get over 50Mbit (up & down) on both tests.
If I plug a laptop with the IP of the firewall I get around 5-10Mbit down and about 2 - 10Mbit upload.
I get the same when run from a PC on the network, so I believe the bottleneck is on the 1841.We used to have a 5 Mbit conenction so we wouldn't notice.
Below is the Interface config, I am stumped, obviously ISP won't help as the speed if fine on the demarkation point.
Any ideas.
Thanks
Arm
We recently upgraded to a 50Mbit internet connection. A basic topology is this.
50Mbit FibreLLink --> Cisco 1841 --> Cisco ASA 5510 ---> Network Switch
If I plug a laptop (with IP of Cisco 1841) into the fibre link and run a speedtest (I am based in the UK) so I use the following.
http://www.speedtest.bbmax.co.uk/, http://www.1024.co.uk/speedtest/speedtest4.php
I get over 50Mbit (up & down) on both tests.
If I plug a laptop with the IP of the firewall I get around 5-10Mbit down and about 2 - 10Mbit upload.
I get the same when run from a PC on the network, so I believe the bottleneck is on the 1841.We used to have a 5 Mbit conenction so we wouldn't notice.
Below is the Interface config, I am stumped, obviously ISP won't help as the speed if fine on the demarkation point.
Any ideas.
Thanks
Arm
interface FastEthernet0/0
description Armxxxx-Primary-POP
ip address 217.xxx.xxx.42 255.255.255.252
speed 100
full-duplex
!
interface FastEthernet0/1
description Armstrong-Local-LAN
ip address 217.xxx.xxx.1 255.255.255.240
duplex auto
speed 100
Have you tested speeds without the ASA? Just router to laptop?
ASKER
hi
I have tested laptop --> 1841 --> Fibre Link where the laptop has IP of ASA, this is whats leads me to believe the bottleneck is indeed the 1841.
Thanks
Arm
I have tested laptop --> 1841 --> Fibre Link where the laptop has IP of ASA, this is whats leads me to believe the bottleneck is indeed the 1841.
Thanks
Arm
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I'm suspicious about how all these speed tests are trustworthy but you can still try to troubleshoot your router:
1. configure speed and duplex settings of the outside interface of auto and run your tests again.
2. configure speed and duplex settings of the inside interface of auto and run your tests again.
3. check the cpu and memory utilization.
4. check if there are enough free blocks (sh blocks). if the LOW column of especially 1550ed blocks closes zero you have experienced for sure at least once congestion.
1. configure speed and duplex settings of the outside interface of auto and run your tests again.
2. configure speed and duplex settings of the inside interface of auto and run your tests again.
3. check the cpu and memory utilization.
4. check if there are enough free blocks (sh blocks). if the LOW column of especially 1550ed blocks closes zero you have experienced for sure at least once congestion.
ASKER
Hi RPPreacher.
So now my conf looks like
interface FastEthernet0/0
description Armxxxx-Primary-POP
ip address 217.xxx.xxx.42 255.255.255.252
speed 100
full-duplex
!
interface FastEthernet0/1
description Armstrong-Local-LAN
ip address 217.xxx.xxx.1 255.255.255.240
full-duplex
speed 100
That has made the downloads now about 50Mbit from the LAN clients, but for the some reason the uploads are jammed about 2-3Mbit, were as before it would go as high as 20Mbit from the LAN.
My ASA interfaces have no duplex or speed settings, maybe I need to implement on it too ?
Thanks again
Arm
So now my conf looks like
interface FastEthernet0/0
description Armxxxx-Primary-POP
ip address 217.xxx.xxx.42 255.255.255.252
speed 100
full-duplex
!
interface FastEthernet0/1
description Armstrong-Local-LAN
ip address 217.xxx.xxx.1 255.255.255.240
full-duplex
speed 100
That has made the downloads now about 50Mbit from the LAN clients, but for the some reason the uploads are jammed about 2-3Mbit, were as before it would go as high as 20Mbit from the LAN.
My ASA interfaces have no duplex or speed settings, maybe I need to implement on it too ?
Thanks again
Arm
Yes. Everything needs to match on speed and duplex.
ASKER
Hi
Finally it works. RPPreacher as you suggsted. I had to change all the interfaces to auto/auto.
Getting 91Mbit down and 50Mbit up.
Thanks again
Cheers
Arm
Finally it works. RPPreacher as you suggsted. I had to change all the interfaces to auto/auto.
Getting 91Mbit down and 50Mbit up.
Thanks again
Cheers
Arm
so jealous of that bandiwth
australia is c**p for internet speed!
australia is c**p for internet speed!