2620XM Router Throughput
I have a question, not really exam related, but all in the name of learning!
I'm playing with my home lab and I've set up a network as in the picture:
http://s7.postimage.org/kauvdad17/home_network.png
I've got my host connected into a 24 port switch - the left 8 ports are in VLAN 100 (hosts), the right 8 in VLAN 200 (internet), and the middle ports are mostly disabled, except one trunk port. The trunk port goes to a 2620XM router, which provides DHCP, inter-VLAN routing, and NAT.
My internet router has 192.168.1.0/25 on the VLAN 200 side, the 2620XM issues 192.168.1.128/25 to my host(s). There is a default route in the 2620XM to send all traffic to 192.168.1.1 (the internet router), and the 2620XM uses NAT Overload to translate all addresses going off to the internet router. I can do little to no config on the internet router - it's a bog standard ISP issued piece of junk. All ethernet connections are set to 100Mb.
This set up all works, my host can get on the internet, everything is fine.
However, if I go on Speedtest.net - The Global Broadband Speed Test, my reported speed is around 2 meg through this set up. If I remove the 2620XM and put both the host and internet router cables into one side of the switch, it increases to around 8 meg. If I disable the wired connection altogether and just use the wireless adapter in my PC, it's 12 meg.
Why would the Cisco kit be throttling the speed so much, any ideas? Something I'm doing / not doing?
It's a pretty basic config, nothing other than the bare bones - I can post configs if required.
I'm playing with my home lab and I've set up a network as in the picture:
http://s7.postimage.org/kauvdad17/home_network.png
I've got my host connected into a 24 port switch - the left 8 ports are in VLAN 100 (hosts), the right 8 in VLAN 200 (internet), and the middle ports are mostly disabled, except one trunk port. The trunk port goes to a 2620XM router, which provides DHCP, inter-VLAN routing, and NAT.
My internet router has 192.168.1.0/25 on the VLAN 200 side, the 2620XM issues 192.168.1.128/25 to my host(s). There is a default route in the 2620XM to send all traffic to 192.168.1.1 (the internet router), and the 2620XM uses NAT Overload to translate all addresses going off to the internet router. I can do little to no config on the internet router - it's a bog standard ISP issued piece of junk. All ethernet connections are set to 100Mb.
This set up all works, my host can get on the internet, everything is fine.
However, if I go on Speedtest.net - The Global Broadband Speed Test, my reported speed is around 2 meg through this set up. If I remove the 2620XM and put both the host and internet router cables into one side of the switch, it increases to around 8 meg. If I disable the wired connection altogether and just use the wireless adapter in my PC, it's 12 meg.
Why would the Cisco kit be throttling the speed so much, any ideas? Something I'm doing / not doing?
It's a pretty basic config, nothing other than the bare bones - I can post configs if required.
Current objective: CCNA Security
My blog: mybraindump.co.uk
My blog: mybraindump.co.uk
Comments
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networker050184
Mod Posts: 11,962 Mod
The 2600xm range of routers, while better than the regular 2600, are very limited in performance. Acorrding to Cisco, best case scenario is about 15Mbps throughput on a 262xXM box. Start turning on services like NAT and you bring it down even more.An expert is a man who has made all the mistakes which can be made. -
Coolhandluke
Member Posts: 118
I'll take a guess that as the 2620(XM) is routing without CEF and/or possibly that platform may not support NAT in CEF (can anyone confirm ?), that could account for some slowdown. As your running it on a stick, is the connection running full duplex ?
performance guide:
http://www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf[CCENT]->[CCNA]->[CCNP-ROUTE]->COLOR=#0000ff]CCNP SWITCH[/COLOR->[CCNP-TSHOOT] -
iamme4eva
Member Posts: 272
Yep, it's full duplex.
Guess it's just my antiquated eBay special cheap-o routers then!
I expected a reduction in performance using NAT etc, but not by 1/5th!
I have no idea what CEF is - I imagine I'm not that far through my CCNP yet!!!!
Thanks for your thoughts guys.Current objective: CCNA Security
My blog: mybraindump.co.uk -
networker050184
Mod Posts: 11,962 Mod
The thing people don't think about when using these routers in the lab is that when they were in their prime one or two T-1s (1-3Mbps) was a fast WAN connection!An expert is a man who has made all the mistakes which can be made.
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iamme4eva
Member Posts: 272
Ha. True enough. But in this day and age, we need FASTER!
Good job I don't actually need it for my internet connection and I was just doing it "to see if I could" then! Current objective: CCNA Security
My blog: mybraindump.co.uk