I believe I have successfully run a "two-armed" router experiment.
Please take a look at my setup and see if I am correct.
Two machines, Colossus-Guardian and Brontonomicon. They are connected by
two separate pairs of network interface cards.
The fast cards are 40 Gbits/sec and have just a crossover cable between
them. The slow cards are 1 Gbit/sec and are attached to a switch.
Colossus-Guardian's address on the fast interface is 10.10.10.2 .
On the slow interface its address is 192.168.1.125 .
I am going to run a Dispatch Router on Bronto. It will accept tcp traffic
from an HTTP load generator over the fast link, and forward that traffic to
a webserver over the slow link.
Does that constitute a two-armed router?
Here is the config file I used for the router running on Bronto:
#-------------------------------------------
# This router is running on Brontonomicon.
#-------------------------------------------
router {
mode: interior
id: A
workerThreads: 32
}
#-------------------------------------------------
# Listen for incoming TCP traffic on 40 Gbit
# interface with Colossus-Guardian.
#-------------------------------------------------
tcpListener {
host: 10.10.10.1
port: 9000
address: two-armed
}
#----------------------------------------------------
# Connect out to Colossus-Guardian for TCP traffic
# on the 1 Gbit/sec interface.
#----------------------------------------------------
tcpConnector {
host: 192.168.1.125
port: 8080
address: two-armed
}
Now on CG I start a webserver that is listening on port 8080.
It is this tiny Go program:
package main
import (
"fmt"
"html"
"net/http"
)
func main() {
http.HandleFunc ( "/",
func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w,
"Hello, %q",
html.EscapeString(r.URL.Path))
})
http.ListenAndServe ( ":8080", nil )
}
Then I start the 'hey' HTTP load generator, also on CG, with this command:
hey -c 10 -z 60s http://10.10.10.1:9000/index.html
That tells it to use 10 senders in parallel and to run for 60 seconds.
After a minute, I get this output:
Summary:
Total: 60.0014 secs
Slowest: 0.0066 secs
Fastest: 0.0002 secs
Average: 0.0006 secs
Requests/sec: 22584.9772
Total data: 27102620 bytes
Size/request: 27 bytes
So! Did I just successfully run a two-armed router ?
