ALu 6850e - Cisco 3750 at 10Gb/s
Posted: 27 Nov 2012 10:04
Hi,
I have a problem i wondered if you could help with.
I have a 7450 -> 6850e running at 10Gb/s with the 6850e acting as NTE. The customer side of the 6850 (1/25) is facing a 3750 again on 10Gb/s. Testing using windows server backup/restore to provide loading.
I have two test servers( server1 & server2) locally at site and two remote test servers on another site, all on 1Gb/s NICs. Although each server targets an individual remote server, they are on the same vlan.
If i connect both servers to the 3750 and test against their partner, when run individually they reach 700Mb/s+. When i run them together the individual speeds reduce to about 200Mb/s
Noticibly, if i connect server1 directly onto the 6850e (1/4) and leave server2 behind the 3750, when i run the same test they both run at 700Mb/s. If i connect both server1 and server2 to the 6850e and run them together they also run at 700Mb/s+
So the fail condition is both servers behind the 3750 for traffic sent from server1 and server2.
If i reverse the test (do a restore instead of a backup) with both server1 and server2 at the 6850, the speeds are approx 200Mb/s.
Testing indicates a problem only when the servers are transmitting together. Can you think of any reason why traffic should be affected so badly?
NB. Sorry for the info overload - however if you need any specific info please ask.
thanks
Jase
I have a problem i wondered if you could help with.
I have a 7450 -> 6850e running at 10Gb/s with the 6850e acting as NTE. The customer side of the 6850 (1/25) is facing a 3750 again on 10Gb/s. Testing using windows server backup/restore to provide loading.
I have two test servers( server1 & server2) locally at site and two remote test servers on another site, all on 1Gb/s NICs. Although each server targets an individual remote server, they are on the same vlan.
If i connect both servers to the 3750 and test against their partner, when run individually they reach 700Mb/s+. When i run them together the individual speeds reduce to about 200Mb/s
Noticibly, if i connect server1 directly onto the 6850e (1/4) and leave server2 behind the 3750, when i run the same test they both run at 700Mb/s. If i connect both server1 and server2 to the 6850e and run them together they also run at 700Mb/s+
So the fail condition is both servers behind the 3750 for traffic sent from server1 and server2.
If i reverse the test (do a restore instead of a backup) with both server1 and server2 at the 6850, the speeds are approx 200Mb/s.
Testing indicates a problem only when the servers are transmitting together. Can you think of any reason why traffic should be affected so badly?
NB. Sorry for the info overload - however if you need any specific info please ask.
thanks
Jase