S4820T and 2 FN410T in FX2

The VLAN-Config is this:

S054243#sh vlan

Codes: * - Default VLAN, G - GVRP VLANs, R - Remote Port Mirroring VLANs, P - Primary, C - Community, I - Isolated
       O - Openflow, Vx - Vxlan
Q: U - Untagged, T - Tagged
   x - Dot1x untagged, X - Dot1x tagged
   o - OpenFlow untagged, O - OpenFlow tagged
   G - GVRP tagged, M - Vlan-stack, H - VSN tagged
   i - Internal untagged, I - Internal tagged, v - VLT untagged, V - VLT tagged

    NUM    Status    Description                     Q Ports
    1      Active                                    U Po1(Te 0/44-47)
                                                     U Po44(Te 0/1,3,5,7)
                                                     U Po45(Te 0/0,2,4,6)
                                                     U Te 0/24-43
*   2      Active                                    U Te 0/8-23
    155    Active                                    T Po44(Te 0/1,3,5,7)
                                                     T Po45(Te 0/0,2,4,6)
                                                     T Te 0/8-9,16-17
    156    Active                                    T Po44(Te 0/1,3,5,7)
                                                     T Po45(Te 0/0,2,4,6)
                                                     T Te 0/10-11,18-19
    157    Active                                    T Po44(Te 0/1,3,5,7)
                                                     T Po45(Te 0/0,2,4,6)
                                                     T Te 0/12-13,20-21
    158    Active                                    T Po44(Te 0/1,3,5,7)
                                                     T Po45(Te 0/0,2,4,6)
                                                     T Te 0/14-15,22-23
S054243#

and the Ping is terrible and makes a config impossible:

Zeitüberschreitung der Anforderung.
Antwort von 192.168.154.244: Bytes=32 Zeit<1ms TTL=255
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Antwort von 192.168.154.244: Bytes=32 Zeit<1ms TTL=255
Antwort von 192.168.154.244: Bytes=32 Zeit<1ms TTL=255
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Antwort von 192.168.154.244: Bytes=32 Zeit<1ms TTL=255
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Antwort von 192.168.154.244: Bytes=32 Zeit<1ms TTL=255
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.

"Zeitüberschreitung der Anforderung." means Timeout

I do not see any VLANs configured on the port-channels, are the VLANs set for tagged/untagged on the port-channels? How is communication to the servers? Are you able to access the IOMs for management using the IP addresses? After the IP address starts to respond to pings, are they consistent pings?

The VLAN status all looks good to me. Is it just this traffic to the switch IP that behaves this way? What about traffic to and from the servers? Does behavior change at all if you reduce the number off connections in the LAG to just one connection?

I noticed this only by traffic to the 2 IOMs. And I tried to put down 3 of the 4 Ports on the S4820T with no change of behaviour

i am not sure there is anything within the config that we change to correct this behavior.

What does the CPU usage look like?

Dell#show processes cpu summary

Memory usage?

Dell#show memory stack-unit 1Statistics

what firmware are these unit on?

But normally I should be able to use the interface over rh IP-Address to see the Dashboard for example.

The S4820T has the following output:

----------------------------
S054243#show processes cpu summary

 CPU utilization        5Sec    1Min    5Min
 -------------------------------------------
 UNIT0                    1%      0%      0%
S054243#show memory
     Statistics On Unit 0 Processor
     ===========================
   Total(b)      Used(b)       Free(b)      Lowest(b)      Largest(b)
  2147483648       2554698    2144928950   1673451254   2144928950
----------------------------

The output from the first FN410T (connected over the CMC)

----------------------------
Dell>show processes cpu summary

 CPU utilization        5Sec    1Min    5Min
 -------------------------------------------
 UNIT0                    0%      0%      0%
Dell>show memory stack-unit 0
     Statistics On Unit 0 Processor
     ===========================
   Total(b)      Used(b)       Free(b)      Lowest(b)      Largest(b)
  2147483648      17064762    2130418886   2125631890   2130418886
----------------------------

Firmware-Version of the FN410T is 9.10(0.1) from the S4820T 9.10(0.1P17)

And another thing. Iwhen I look for the traffic at the Channels I see that some ports has more traffic than others. Possible normal because it's not so much in the moment but I expected a nearly equal amount of traffic in the Channel:

S054243#sh link-bundle-distribution
Link-bundle trigger threshold - 60

LAG bundle - 44      Utilization[In Percent] - 1      Alarm State - Inactive

Interface                Line Protocol   Utilization[In Percent]
Te 0/1                   Up              4
Te 0/3                   Up              1
Te 0/5                   Up              0
Te 0/7                   Up              0

LAG bundle - 45      Utilization[In Percent] - 1      Alarm State - Inactive

Interface                Line Protocol   Utilization[In Percent]
Te 0/0                   Up              0
Te 0/2                   Up              5
Te 0/4                   Up              0
Te 0/6                   Up              0
S054243#

The LAG is going to balance traffic based on source and destination. A single connection will not be able to achieve speeds higher than one physical connection. As more devices make more connections across the LAG, you should see that utilization spread across the LAG members.

That's true. But for example the 5 with 3 time 0. I thougt that the traffic would be spread over the ports?

Hello,

I have a FX2 with 2 FN410T currenty running in Default standalone mode. So I connected them with Portchannels to the uplink-Switch.

Now I got the recommendation to run in VLT-mode. I try to understand it. As far as I understand I Need to connect the 2 FN410T over Ports 9 for the VLT internal traffic. And than I read something about a heartbeat/backup link. This should be defined over the management-IPs. But the management-IPs are defined on the VLAN-Interface in my case. Can I use this anyway? And d I Need to use another pair of ports for this?

All guides only define Portchannels eith the 4 Ports 10 and 11 of the 2 FNs. Why? Than I use a lot of bandwith comparing with the Default mode?

Thy in advance

Hi,

I have several DELL-equipement and especially for here I'm asking about a S4820T and 2 FN410T in a FX2. I want all have a management-IP defined on the Management-Interface. Especially for the 2 FN410T I want to use the Management-Interface because onla than I can see it in the CMC of the FX2.

But for this I Need a Management-VLAN because only than the MAC-address of the Management-VLAN won't flap from the CMC Port to the FN410T external ports and back.

So, how can I define a Manegement-VLAN without loosing the connecion? I'm might missing only a very small Thing but I'm stuck. As far as I know I cannot define a VLAN for the Management-IP of the FN410T. So do I have to move all other traffic in another VLAN? And how can I connect to the management-IP if it is in another VLAN?

Thx in advance

So, the reason for the Timeouts is that the Management-IP was reachable over 2 different ways. Either over the Portchannel and than over the CMC.That causes the Mac-Address flapping around.

I configured the Management-IP to the Default VLAN. That makes the FN410T reachable but I cannot see the address in the CMC. I'll Close this Topic and open another one for this.

Hi,

as far as I know I cannot assign the Management-Interface of the FN410T to a VLAN. But can I use a Subnet wich resides in a tagged VLAN on the Uplink-Switch? The CMC-Cable uses a port for the tagged VLAN.

Thx in advance

That is interesting to hear about the management interface IP address. My understanding was that the management interface IP on the CMC was treated like an OOB interface, and would not be seen by the rest of the traffic on the switch. It would definitely help to see your full config, otherwise it is just a guess as to what the config looks like. Please also include the config line that was recently changed.

These switches have a VLT mode. When VLT mode is enabled, it reserves port channel 127 for the VLTi(interconnect between switches).

Page 15: http://dell.to/2wMBlEW

"Dell(conf)#stack-unit 0 iom-mode vlt

Select this mode to multi-home server interfaces to different IOA modules. This is a low-touch mode where all configuration except VLAN membership is automated. To enable VLAN, you must

configure the VLANs at the server port level. In this mode, port 9 link, which is associated with LAG-127, is dedicated to VLT interconnect."

VLT whitepaper, non specific to these switches: http://dell.to/1QDhk52

You should be able to access and manage the switch from any VLAN that you assign an IP address to.

To send tagged and untagged traffic, you will need to set the port channel to hybrid mode.

# Interface po128
# portmode hybrid

Then set each VLAN to be tagged/untagged.

I'll send the config when I'm ready. I'm now stuck hopefully on the last problem.