SG-300 slow speeds - Page 2

has123456 · ‎02-21-2015

Hi there,

I've just purchased two SG300-28 switches. The setup is as follows:

SG300-1 (IP 192.168.1.30 VLAN1) Connects to HP 10/100 Core switch via GE26 .

SG300-2 (IP 192.168.1.30VLAN1) Connects to HP 10/100 Core switch via GE26

The data and management network are both VLAN1, 192.168.1.0/24 subnet.

My server (2012R2) has windows nic teaming enabled with one nic in switch1 and the other in switch2. Both ports are VLAN1 and the nic team has an IP of 192.168.1.56. Server nics are 1 GBe.

While the switches have other VLANs on 2 ports, they are local to the switch only and are not trunked across on GE26.

The default gateway is 192.168.1.254. I do not have access to the HP Core switch.

All ports on the SG's are in trunk mode.

The issue I am having is that network speeds are very slow, averaging from 10 to 20 MB/S during large file transfers.

I have turned off QOS. I have enabled and disabled Jumbo frames and I have turned STP off and then on as well with no difference. I have broken the nic team and tried to transfer data to the server with my laptop connected directly to one of the switches but I'm not seeing any real improvement (when laptop is connected to switch one and server is on switch2, I see better performance than when I have them on the same switch).

Now if I instead disconnect SG300-1 from the HP and connect it to the SG300-2 and connect that to the HP Core switch, my speeds jump up to 600 to 800 MB/s all across the board.

Can anyone please advise further as I'm a bit stumped and am not that experienced when it comes to networking?

Thanks

HA

rakeshvelagala · ‎02-22-2015

Hi,

You are accessing the server in the same subnet so even if your core is L3, the packet should be L2 switched as it is connected.

Laptop nic---Switch1---Core Switch--Switch2---Server nic1

Yes, please try above after doing changes as below

You should change the mode of the switch connected to your laptop as access as your PC cannot understand tagged frames.

Can you advise which is the port in those switches connected to your core switch?

According to Doc:

http://www.cisco.com/c/dam/en/us/td/docs/switches/lan/csbms/sf30x_sg30x/administration_guide/CLI_300_1_3.pdf

Can you please put below config on the port connecting to the core switch

default interface x/x

interface x/x

Switchport mode trunk

On the port connecting to your PC

default interface x/x

interface x/x

Switchport mode access

On the Other interfaces, please default all the interface and then

whichever vlan you want to tag the ports, configure them accordingly

interface x/x

Switchport access vlan xx

Similarly on the Switch 2 for the port connecting to the core switch as trunk and the port connecting to the server as access similarly with the above commands and default all the other interfaces.

Thanks

has123456 · ‎02-22-2015

Hi,

GE26 on both SG300-1 and SG300-2 are connected to the core switch. Can you please advise where in the web interface I can set the default interface for the port?I am not that familiar with the CLI and cannot run the 'default interface command'. I can change the mode to access from the Web interface.

For example:

default interface x/x <How do I set this and what do I set it to?

interface x/x

Switchport mode access

Also, smartport is disabled. Should it be enabled?

Thanks,

HA

has123456 · ‎02-22-2015

Hi again,

Just wanted to add that the VLANs 60 and 61 are not meant to be trunked via the link to the core switch. Only the default VLAN (VLAN1) is meant to be trunked to the core switch. VLANs 60 and 61 are used by two hyper-v hosts (cluster) for live migration and cluster traffic and the traffic on them doesn't need to be exposed to VLAN1.

Thanks,

HA

rakeshvelagala · ‎02-22-2015

Hi,

You can follow this to set it up from below

http://www.davemalpass.com/cisco-vlan-setup/

In your core switch the admin should have configured (To allow only vlan 1 traffic)

#switchport trunk allowed vlan 1

thanks

Charles Hill · ‎02-22-2015

To default an interface,

Type "config t"

Then type "default interface xy"

This clears all config from the interface and resets it to the default settings.

has123456 · ‎02-23-2015

Hi cehill,

Thanks for your replies. Whenever I type default interface xy I get a command not recognized.

Thanks,

HA

Charles Hill · ‎02-23-2015

My apologies. I don't see the default interface command in the cli guide for the SG-300 series.

http://www.cisco.com/c/dam/en/us/td/docs/switches/lan/csbms/sf30x_sg30x/administration_guide/CLI_300_1_2_9.pdf