topic extreme switch connected to cisco switch and losing packet in ExtremeSwitching (EXOS/Switch Engine)

extreme switch connected to cisco switch and losing packet

Siva2 — Thu, 30 Mar 2017 18:40:00 GMT

Hi All

Can someone help me, I have 2 ExtremeXOS 440 switches version 21.1.1.4 connected to cisco switch 6500.

Problem : when I’ doing continues ping I’m getting packet loss and when one switch responding to my pings another will not respond vice vasa .

This is my configuration on extreme switches

create vlan "internal-man-105"

configure vlan internal-man-105 tag 105

configure vlan internal-man-105 add ports 2:24 tagged

configure vlan internal-man-105 ipaddress 1.1.1.1 255.255.255.248

enable ipforwarding vlan internal-man-105

configure ports 2:24 auto on speed 1000 duplex full

this is my configuration on cisco switch

interface GigabitEthernet3

description Extreme-switch Uplink

switchport

switchport mode trunk

logging event link-status

logging event trunk-status

logging event bundle-status

logging event spanning-tree status

logging event subif-link-status

load-interval 30

keepalive 30

speed 1000

duplex full

udld port aggressive

mls qos trust cos

flowcontrol receive on

flowcontrol send on

spanning-tree portfast edge trunk

spanning-tree bpduguard enable

end

RE: extreme switch connected to cisco switch and losing packet

Patrick_Voss — Thu, 30 Mar 2017 21:23:00 GMT

Hello Siva,

What switch are you pinging and where are you pinging from? What are the IP addresses of each switch?

RE: extreme switch connected to cisco switch and losing packet

Siva2 — Thu, 30 Mar 2017 21:23:00 GMT

Hi Patrick

My extreme switch IP address are 10.1.1.2 / 24 and 10.1.1.3 / 24 default gateway 10.1.1.1 /24
Cisco switch 10.1.1.1/24

i'm pinging extreme switch from my laptop cmd

RE: extreme switch connected to cisco switch and losing packet

Nick_Yakimenko — Thu, 30 Mar 2017 21:23:00 GMT

ip on your laptop is on the same subnet?

RE: extreme switch connected to cisco switch and losing packet

Patrick_Koppen — Thu, 30 Mar 2017 21:52:00 GMT

Hi Siva,

on EXOS you turned auto-negotiation on and advertise only 1000/full.

Are you sure duplex full and speed 1000 does not turn auto-negotiation off on cisco?
Spanningtree or udld could be a problem. You should look at the error counters, fdb,
spanningtree, link state, ..... Turn on logging on IOS and EXOS. Does any happen?
Link los, errors disable, duplicate ip, arp change, TCN, ...?

show ip int brief
show interface
show controllers GigabitEthernet3
....

Regards
Patrick

RE: extreme switch connected to cisco switch and losing packet

Siva2 — Thu, 30 Mar 2017 21:52:00 GMT

Hi Patrick

I have check Spanningtree on cisco log i dont see and any errors so i believe Spanningtree is not an issue problem .

* Slot-2 Stack.1 # configure ports 2:24 auto off speed 1000 duplex full Error: Auto negotiation off is not supported on copper medium of combo port 2:24 at 1G or 10G speed.

when I try to make it off i'm getting above error
How to configure speed on EXOS not to be auto ?

RE: extreme switch connected to cisco switch and losing packet

Patrick_Koppen — Thu, 30 Mar 2017 21:52:00 GMT

I hope not. Gigabit should always use auto negotiation. Try speed auto on Cisco.
An please check the error counters. Without a picture of you network and a detailed
error description it's just fishing in the dark.

RE: extreme switch connected to cisco switch and losing packet

Erik_Auerswald — Thu, 30 Mar 2017 21:52:00 GMT

speed 1000 on Cisco IOS uses auto-negotiation, speed 100 disables it

RE: extreme switch connected to cisco switch and losing packet

Nick_Yakimenko — Thu, 30 Mar 2017 21:52:00 GMT

any speed command on cisco disables auto-negotiation
to re-enable auto-negotiation you should issue
no speed
under selected interface

RE: extreme switch connected to cisco switch and losing packet

Erik_Auerswald — Thu, 30 Mar 2017 21:52:00 GMT

Hi Nick,

"speed 1000" on Cisco IOS does not disable auto-negotiation, it just restricts the advertised speeds to gigabit only. This is a trap I have seen many people fall into when trying to interconnect non-Cisco and Cisco switches with a "fixed" speed of 1000.

Thanks,
Erik

RE: extreme switch connected to cisco switch and losing packet

Karthik_Mohando — Sat, 01 Apr 2017 06:35:00 GMT

Siva, Are the two switches(10.1.1.2,10.1.1.3) are in stacking? If so can you post the "show switch" output from both the switches?

RE: extreme switch connected to cisco switch and losing packet

Patrick_Koppen — Sat, 01 Apr 2017 22:11:00 GMT

Hi Siva,

error counters look normal (pause is strange...). Could you tell us a little more about you problem?

What is the IP of your laptop?
Which port is you laptop connected to?
What are the exact timings of the packet losses (e.g. loss after every 30 seconds, or work for 10 seconds, stopps for 60 seconds....)?

But still... it could be anything...

Regards
Patrick

RE: extreme switch connected to cisco switch and losing packet

Karthik_Mohando — Mon, 03 Apr 2017 16:25:00 GMT

configure ports 2:24 auto on speed 1000 duplex full as per the port number 2:24 it looks like a stacking switch to me but anyways can you share the "show switch" output from both the switches ?

RE: extreme switch connected to cisco switch and losing packet

Siva2 — Mon, 03 Apr 2017 19:48:00 GMT

Maybe I need to plug 2 switches on the different blade on cisco switch, I will do this tomorrow.

RE: extreme switch connected to cisco switch and losing packet

Karthik_Mohando — Tue, 04 Apr 2017 08:47:00 GMT

Siva, Is it possible to share the "show switch" output from both the switches ?

RE: extreme switch connected to cisco switch and losing packet

Siva2 — Wed, 05 Apr 2017 14:38:00 GMT

I have to change the cable's and change ports on both Cisco switch and extreme switch but still experiencing the same issue.

At this stage, I think extreme switch are not the good one. 😞

RE: extreme switch connected to cisco switch and losing packet

Karthik_Mohando — Wed, 05 Apr 2017 16:07:00 GMT

Hi Siva, Can you share the "show switch" output from both the switches please? The last one you posted was "show conf" i am looking for the "show switch" output from both the switches and see what MAC address they have....

RE: extreme switch connected to cisco switch and losing packet

Karthik_Mohando — Thu, 06 Apr 2017 16:54:00 GMT

Hi Siva, I guess during configuration you may have configured the same MAC address for both the stacks which is causing this issue. please use the below command so that the MAC address will get configured automatically. "configure stacking mac-address" Please note that you need to reboot the stack once the command is executed. I hope you will not see the reported issue once you do the above.

RE: extreme switch connected to cisco switch and losing packet

Karthik_Mohando — Thu, 06 Apr 2017 18:05:00 GMT

Hi Siva, If i understood correctly although the switches have stacking enabled they do not have any physical connections via the stacking cable to any other node (switch). If yes then the given command will only change the MAC address.

RE: extreme switch connected to cisco switch and losing packet

Erik_Auerswald — Fri, 07 Apr 2017 17:14:00 GMT

Hi,

do you use a fiber connection between the Extreme and Cisco switches? If so, activating UDLD on the Cisco is problematic, because it is a Cisco proprietary feature that does not work with other vendors' switches.

Using Ethernet flow control (active on the Cisco) is not a good idea in general, it might cause intermittent problems, like dropping one ping packet or the other.

The "keepalive 30" setting on the Cisco is dubious as well, as this should enable a Cisco proprietary keepalive mechanism, but the EXOS switch does not send responses.

Since you have configured BPDU Guard on the Cisco, you must not enable STP on the EXOS switch. You can check if BPDU Guard error disabled an interface using "show interfaces err-disable."

Thanks,
Erik