topic RE: x460 Summit Stack Performance-Internet Slowness in ExtremeSwitching (Other)

x460 Summit Stack Performance-Internet Slowness

Stanley_Riley_J — Thu, 05 Nov 2015 22:23:00 GMT

Hey guys,

We have an 8 switch stack of x460 48p. We are seeing very slow internet speeds on devices connected to stacks 5,6, and 7.

SWITCH # = DOWNLOAD / UPLOAD

Stack 1 = 168 / 23

Stack 2 = 159 / 23

Stack 3 = 144 / 23

Stack 4 = 120 / 23

Stack 5 = 33 / 23

Stack 6 = 6 / 23

Stack 7 = 20 / 23

Stack 8 = 177 / 23

I have even connected my laptop directly to ports on each stack and took the above measurements. All ports look normal as far as running 1000/FULL. I'm not sure what else to look for.

We are running XOS 15.5.4.2 patch 1-5.

Does anyone have any ideas on this behavior from these switches in our stack? I'm not sure if I provided enough information, but let me know what else might be helpful and I'll see if I can get it.

Thanks in advance for any suggestions you guys might have.

RE: x460 Summit Stack Performance-Internet Slowness

Prashanth_KG — Thu, 05 Nov 2015 22:30:00 GMT

Hi Stanley,

Is the stack ring or daisy chain topology?

Do you see any fabric congestion for slots 5, 6 and 7?

"debug hal show congestion"

Also, share the details about where the gateway for internet is connected. In which slot?

Looking forward to your answers!

RE: x460 Summit Stack Performance-Internet Slowness

Stanley_Riley_J — Thu, 05 Nov 2015 22:50:00 GMT

The gateway for the internet is in slot 1. I think we are using a daisy chain topology, where slot 1 (stacking port 1) goes to slot 2 (stacking port 2) all the way down the line where on slot 8 returns back to slot 1.

Will that debug be service affecting?

RE: x460 Summit Stack Performance-Internet Slowness

Prashanth_KG — Thu, 05 Nov 2015 22:56:00 GMT

Stanley,

The explanation that slot 8 returns back to slot 1 indicates that it is ring.

Please share the following outputs:

- debug hal show congestion
- show stacking
- show ports stack-ports rxerrors

RE: x460 Summit Stack Performance-Internet Slowness

Stanley_Riley_J — Thu, 05 Nov 2015 23:13:00 GMT

Oh. I'm sorry, I guess I confused the 2 topologies. Here is my output:

Stack Topology is a Ring
Active Topology is a Ring
Node MAC Address Slot Stack State Role Flags
------------------ ---- ----------- ------- ---
*00:04:96:x 1 Active Master CA-
00:04:96:x 8 Active Standby CA-
00:04:96:x 7 Active Standby CA-
00:04:96:x 6 Active Standby CA-
00:04:96:x 5 Active Standby CA-
00:04:96:x 4 Active Standby CA-
00:04:96:x 3 Active Standby CA-
00:04:96:x 2 Active Backup CA-
* - Indicates this node
Flags: (C) Candidate for this active topology, (A) Active Node
(O) node may be in Other active topology

Port Rx Error Monitor Thu Nov 5 11:11:13 2015
Port Link Rx Rx Rx Rx Rx Rx Rx
State Crc Over Under Frag Jabber Align Lost
================================================================================
1:1 A 981 0 0 0 0 0 0
1:2 A 2 0 0 0 0 0 0
2:1 A 0 0 0 0 0 0 0
2:2 A 0 0 0 0 0 0 0
3:1 A 0 0 0 0 0 0 0
3:2 A 0 0 0 0 0 0 0
4:1 A 0 0 0 0 0 0 0
4:2 A 0 0 0 0 0 0 0
5:1 A 0 0 0 0 0 0 0
5:2 A 0 0 0 0 0 0 0
6:1 A 6302 0 0 0 0 0 0
6:2 A 0 0 0 0 0 0 0
7:1 A 5824 0 0 0 0 0 0
7:2 A 0 0 0 0 0 0 0
8:1 A 0 0 0 0 0 0 0
8:2 A 0 0 0 0 0 0 0
================================================================================
> indicates Port Display Name truncated past 8 characters
Link State: A-Active, R-Ready, NP-Port Not Present, L-Loopback
0->Clear Counters U->page up D->page down ESC->exit

Congestion information for slot 1 type X460-48p since last query
No switch fabric and CPU congestion present

Congestion information for slot 2 type X460-48p since last query
No switch fabric and CPU congestion present

Congestion information for slot 3 type X460-48p since last query
No switch fabric and CPU congestion present

Congestion information for slot 4 type X460-48p since last query
No switch fabric and CPU congestion present

Congestion information for slot 5 type X460-48p since last query
No switch fabric and CPU congestion present

Congestion information for slot 6 type X460-48p since last query
No switch fabric and CPU congestion present

Congestion information for slot 7 type X460-48p since last query
No switch fabric and CPU congestion present

Congestion information for slot 8 type X460-48p since last query
No switch fabric and CPU congestion present

RE: x460 Summit Stack Performance-Internet Slowness

Drew_C — Thu, 05 Nov 2015 23:13:00 GMT

Those RX CRC errors are of interest.
If you watch that output, are they incrementing? You can

code:

clear counters

to set it back to zero and watch too.

RE: x460 Summit Stack Performance-Internet Slowness

Stanley_Riley_J — Thu, 05 Nov 2015 23:13:00 GMT

Agreed. I have cleared the counters and I'm watching the output. So far, port 6:1 has incremented by 5 over the last say 10-15 minutes. And 7:1 increased by 1 while typing this reply.

Do we have a possible bad stacking cable or stacking modules?

RE: x460 Summit Stack Performance-Internet Slowness

Drew_C — Thu, 05 Nov 2015 23:13:00 GMT

Yep, both cases are possible (though a cable is most likely). Can I ask you to open a case with GTAC so they can help you dig in and figure it out?
How to contact Extreme Networks Global Technical Assistance Center (GTAC)

RE: x460 Summit Stack Performance-Internet Slowness

Stanley_Riley_J — Thu, 05 Nov 2015 23:13:00 GMT

Sure can...thanks for all the help!