Here are some commands which help us to locate performance issue problems in a switching environment. Commands of course are not limited to ones mentioned below, but I believe these are the most used ones.

Dell NSeries Switch Basic configuration cheat sheet

Show controllers cpu-interface If the switch is being flooded by a specific packet type, the hardware places that packet type into the appropriate CPU queue and counts it. Enter the show controllers cpu-interface privileged EXEC command to see the packet count per queue.

The switch also counts the CPU-bound packets that are discarded due to congestion. Each CPU receive queue has a packet-count maximum. When the receive queue maximum is reached, the switch hardware discards packets destined for the congested queue. The switch counts discarded packets for each queue. Increased discard counts for a particular CPU queue mean heavy usage for that queue.

Enter the show platform port-asic stats drop privileged EXEC command to see the CPU receive-queue discard counts and to identify the queue discarding packets. This command is not as useful as the show controllers cpu-interface command because the output shows numbers for the receive queues instead of names, and it shows only the discards.

Because the switch hardware sees the CPU receive-queue dropped packets as sent to the supervisor, the dropped packets are called Supervisor TxQueue Drop Statistics in the command output.

For example, if the CPU is receiving many packets because of a broadcast storm on the network, it is so busy processing all the those packets that the other system processes do not have access to CPU resources. The output shows how busy the CPU has been in the past 5 seconds, the past 1 minute, and the past 5 minutes.

The output also shows the utilization percentage that each system process has used in these periods. This number is the total CPU utilization for all the active system processes, including the percentage of time at the interrupt level.

The interrupt percentage is the CPU time spent receiving packets from the switch hardware. The percentage of time at interrupt level is always less than or equal to the total CPU utilization. Two other important numbers are shown on the same output line: the average utilization for the last 1 minute 6 percent in this example and the average utilization for past 5 minutes 5 percent in this example.

These values are typical for a nonstacked switch in a small and stable environment. There can be hundreds of active system processes on the CPU at any time. This number can vary, based on the switch model, the Cisco IOS release, the feature set, and if applicable the number of switches in a switch stack.

For example, on a stack of Catalyst switches running the IP base image, there are typically active system processes.

The Catalyst switch running the LAN base image has a smaller number of active processes than a stack of Catalyst switches. In general, the more features in the Cisco IOS image, the more system processes. Show platform tcam utilization Use the show platform tcam privileged EXEC command to display platform-dependent ternary content addressable memory TCAM driver information. This is so that a switch can do a bitwise and with access lists or access control entities ACE.

The above information is meant to provide an abstract view of the current TCAM utilization. Show platform ip unicast counts Use the show platform ip unicast privileged EXEC command to display platform-dependent IP unicast routing information.

Show interfaces counters Use the show interfaces counters privileged EXEC command to display various counters for the switch or for a specific interface. Debug spanning-tree Use the debug spanning-tree privileged EXEC command to enable debugging of spanning-tree activities. Use the no form of this command to disable debugging. Debug standby The debug standby terse command is probably the most useful option because it gives a short form output of all HSRP errors, events, and packets:.

From here, if you see a Coup problem, for example, you might want to turn off the terse option and replace it with a full packet-level debug. Conversely, if you see that there is an issue with interface tracking, you might want to replace the terse option with the event option to get greater detail. This normally happens one of two ways.Command introduced before Junos OS Release 7.

Command introduced in Junos OS Release 8. Command modified in Junos OS Release 9.

show interface statistics dell switch

Command introduced in Junos OS Release Command modified in Junos OS Release Starting in Junos OS Release The new precise-bandwidth option reflects the new speed 9.

The input and output bytes bps and packets pps rates are not displayed for IFD and local traffic. On SRX Series appliances, on configuring identical IPs on a single interface, you will not see a warning message; instead, you will see a syslog message.

Use the show interfaces command to view the interface speeds. Following is a list of typical interface names. Replace pim with the PIM slot and port with the port number. In a logical system, this command displays information only about the logical interfaces and not about the physical interfaces. Understanding Layer 2 Interfaces on Security Devices. Output fields are listed in the approximate order in which they appear. Table 1: show interfaces Gigabit Ethernet Output Fields.

State of the interface. Loopback status: Enabled or Disabled. If loopback is enabled, type of loopback: Local or Remote. Source filtering status: Enabled or Disabled. Unidirectional link mode status for Gigabit Ethernet interface: Enabled or Disabled for parent interface; Rx-only or Tx-only for child interfaces.

Flow control status: Enabled or Disabled. Gigabit Ethernet interfaces Autonegotiation status: Enabled or Disabled. Offline —Autonegotiation is manually configured as offline. Information about the physical device. Information about the interface. Information about the link.

Date, time, and how long ago the interface went from down to up. The format is Last flapped: year-month-day hour : minute : second : timezone hour : minute : second ago. For example, Last flapped: PDT ago. Input rate in bits per second bps and packets per second pps.

The value in this field also includes the Layer 2 overhead bytes for ingress traffic on Ethernet interfaces if you enable accounting of Layer 2 overhead at the PIC level or the logical interface level. Output rate in bps and pps.

The value in this field also includes the Layer 2 overhead bytes for egress traffic on Ethernet interfaces if you enable accounting of Layer 2 overhead at the PIC level or the logical interface level.This document is intended to help determine why a port or interface experiences problems. Refer to Cisco Technical Tips Conventions for more information on document conventions.

If you have physical access to the switch, it can save time to look at the port LEDs which give you the link status or can indicate an error condition if red or orange. The table describes the LED status indicators for Ethernet modules or fixed-configuration switches:. Ensure that both sides have a link. A single broken wire or one shutdown port can cause the problem where one side has a link light, but the other side does not.

A link light does not guarantee that the cable is fully functional. The cable can have encountered physical stress that causes it to be functional at a marginal level. Normally you can identify this situation if the port has many packet errors, or the port constantly flaps loses and regains link.

Make sure you have the correct cable for the type of connection you are making. Always ground the cables especially in new cable runs to a suitable and safe earth ground before you connect them to the module. For fiber, make sure you have the correct cable for the distances involved and the type of fiber ports that are used. Connections for transmit-to-transmit and receive-to-receive do not work. If you have device A connected to device B over a Gigabit link, and the link does not come up, perform this procedure.

Both devices must use the same type of GBIC to establish link. The numbers given for multimode fiber-optic cable refer to the core diameter. For single-mode fiber-optic cable, 8. The 9-micron and micron values refer to the mode-field diameter MFDwhich is the diameter of the light-carrying portion of the fiber. This area consists of the fiber core plus a small portion of the surrounding cladding. The MFD is a function of the core diameter, the wavelength of the laser, and the refractive index difference between the core and the cladding.

Distances are based on fiber loss. Multiple splices and substandard fiber-optic cable reduce cabling distances. The mode-conditioning patch cord is required for link distances less than feet m or greater than feet m. The mode-conditioning patch cord prevents overdriving the receiver for short lengths of MMF and reduces differential mode delay for long lengths of MMF. Without attenuators, the minimum link distance is If either device has multiple Gigabit ports, connect the ports to each other.

This tests each device and verifies that the Gigabit interface functions correctly. For example, you have a switch that has two Gigabit ports. Wire Gigabit port one to Gigabit port two. Does the link come up? If so, the port is good. Does the port come up?I have a stack of Dell Powerconnect and switches. I have a single 3com switch. Spiceworks seems to extract much more detailed information from the SNMP interface of the 3com than that of the Dell switches.

Why is this and how can I configure the Dell switches to provide the same level of data as the 3com switch? Do you get VLAN data for both? If you could elaborate a bit more on what 'more detailed information' is, that'd help to diagnose the issue.

Spiceworks tells me that every device on the network is connected to Port 49 on the 3com switch. I assume this is because the 3com switch is reporting the MAC addresses it sees on its ports, and the Dell switch is not reporting this information. As I mentioned above all the individual devices discovered by Spiceworks are listed as being plugged into Port 49 of the 3com switch rather than the port number of the Dell switch into which they are physically connected, this is very irritating!

I have still not resolved this issue. Does anyone have any ideas as what my next actions should be? I've got a few VLAN related bug fixes that should be in the next patch that might address this issue.

I can let you know when it's ready so you can test. To continue this discussion, please ask a new question. Get answers from your peers along with millions of IT pros who visit Spiceworks. Thanks Chris.

show interface statistics dell switch

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This topic was created during version 5. The latest version is 7. Chris Nov 17, at UTC. Chris Nov 24, at UTC. Chris Nov 25, at UTC. Yes please! Chris Dec 23, at UTC. This topic has been locked by an administrator and is no longer open for commenting. Read these nextDell Switch Show Interface Errors. Since the packets with errors are coming into the switch, check the device on the other side.

What Notebook Should I Buy? Not sure which laptop you should buy? It's a tough decision, so post questions and get help from our expert forum members!. Using a Dell PowerConnect switch. Selecting your model allows us to tailor our support site for you. It does not include an optical drive. Switch show run interface range ethernet all spanning-tree portfast.

Layer 2 Discards Troubleshooting – RX TX Discards

This article explains the Errdisable feature on Cisco Catalyst switches. Using the link aggregation feature in DDOS can result in an increase in throughput, however depending on several factors it could result in the opposite. Display the current operational state of all ports with the list of connected users.

It is designed to enable massive network automation through programmatic extension, while still supporting standard management interfaces and protocols e. ServeTheHome and ServeThe. IP Rout ing show ip interface show ip int erface The out put of the command is. Thousands of customers use the McAfee Community for peer-to-peer and expert product support.

However, some level of CRC errors should be expected and the standard allows up-to bit-error-rate on Ethernet 1 bit out of 10 12 can flip and it's acceptable according to the standard.

Intuitive to Use. On the CISCO command-line interface, there is the shutdown interface configuration command to disable an interface and the no shutdown command to enable it. This happens when the port on one device is set for full-duplex and the port on the connected peer device is set for half-duplex.

InterWorks is a people-focused tech consultancy that guides clients with premier service and expertise. IE: counters. Download free Network Monitoring software to capture, analyze, and monitor network traffic. For example, if you power […]. To perform this task, I connected to the serial interface, logged into the CLI console with my terminal emulator and reset the device, and configured an ip address in preparation to use the web GUI.

Since when? Only during Peak or constant regardless of load?

Troubleshooting Switch Port and Interface Problems

Utilization Peak vs. Arista Networks was founded to pioneer and deliver software-driven cloud networking solutions for large data center storage and computing environments. Some of the methods like dladm were not available in solaris 8 and 9. CNET Forums feature a wide range of topics, including phones, laptops, smart homes. DELL Force10 switch is no exception. MCSA ,Networking. Hope this helps. Job Postings.

NoMachine for Everybody. After you login to the IDRAC, you will see this page, press launch to download the virtual console file. Not all options are currently supported on switch port.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. Where I work at, we have a bunch of Cisco Catalyst switches plus two routerswhich no one knows how to administer the guys who installed them, it turns out, don't like doing tech support for freeso I'm stuck trying to figure out how to do even the simplest of tasks.

However, while I can see the statistics in the Device Manager the web interfaceI can't find the command-line version of said statistics, which I need if I want to write a script. I have the root password for the switches, so I can ssh into the devices, but I can't find which commands are the ones I need.

Any ideas? In case you ask: yes, it would be smarter to check this in the router instead of the switches, but I know nothing about Cisco, so toying around with the router scares me like a little girl I do know about regular networking, thoughand yes, there is a proxy on the way, but those things take time check the " How do I plug a proxy into a Cisco router? In the "show interface" output, you'll see cumulative counters since the last counter reset "clear counters []", no specified interface clears counters for all interfaces.

This allows you to take snapshots at whatever interval you want. If you're happy scraping the CLI output and do it yourself, that MAY be a quicker way to get up and running with this specific task. I do suspect that some training material and time to install MRTG or Cacti will be worth your time investment, though. To make this easy for yourself and show off some pretty graphsI'd just install Cacti and use SNMP to monitor the switch ports.

It's been running quietly ever since, generating rrd graphs similar to the one pictured in Cacti up above. It's not the prettiest, or most effective, but it's a point in the right direction and should give you an estimate of what you're looking for. Sign up to join this community. The best answers are voted up and rise to the top.

Home Questions Tags Users Unanswered. Port statistics on Cisco switch Ask Question. Asked 9 years, 5 months ago. Active 9 years, 5 months ago. Viewed 43k times. That works, but every time I do that by hand I die a little inside Any ideas? Martin Martin 1 1 gold badge 2 2 silver badges 11 11 bronze badges. Active Oldest Votes. Vatine Vatine 5, 19 19 silver badges 23 23 bronze badges.

How about MRTG? MRTG works great and is a proven classic. It's a little clunky to initially setup, but it's lightweight once running and universally accepted.I have a port that I believe is going up and down on a X-port switch. Is there a command that will show information as to how long that port has been in an "up" state? I am not sure if there is a command that show that, however if you have monitoring system it will show when and how many times has an interface gone up and down.

No, it always shows this same date and time for all the interfaces even though the switch is configure with the correct date and time. I don't think this command actually woks. Thanks for this! I believe the timestamp is from when the switch first booted, before it set its clock. Try the following commands.

Someone else in the community shared this with me quite awhile back. It has helped us a lot. For a single interface.

show interface statistics dell switch

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Did you mean:. Adam Sorenson. Command to see Switchport Uptime. Labels: Other Switching. I have this problem too. Reza Sharifi. VIP Expert. I am not sure if there is a. Leo Laohoo. Hall of Fame Community Legend.

Look at your logs if link.


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