• Tag : CPU


High CPU on FHR or RP due to PIM

Introduction High CPU due to PIM processes is not always a bug and may be caused by either a misconfiguration or a routing issue.  For the purposes of this document we will focus primarily on network misconfiguration. Overview Network wide choppy video, music on hold streams or loud speaker issues are commonly caused by multicast problems in the network.  Should the issue be network wide and not isolated to one area of the network, the next place to start looking is high CPU on the First Hop Routers (FHR) and/or the Rendezvous Point (RP).  When the CPU process is high...
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Arista recommended index intervals for splunk-forwarder

Hello, We are running EOS 4.22.3 M, SplunkUniversalForwarder 6.6.2 and AristaApp 1.6.0, one thing we noticed with all these latest extensions is the high CPU load averages when running splunk-forwarder. If we shutdown the splunk load averages goes down to an average of 0.40 per minute, with splunk running it is always more than 1.00. Below are the details. oblf12-idev#show extensions Name Version/Release Status Extension ———————————————– ——————– ———– ——— AristaAppForSplunk-1.6.0.swix 1.6.0/1.fc18 A, I 3 splunkforwarder-6.6.2-4b804538c686.i386.r\ 6.6.2/4b804538\ A, I 1 pm c686 A: available | NA: not available | I: installed | NI: not installed | F: forced oblf12-idev#show version Arista...
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Mirroring to CPU on 7050, 7060, 7260, 7368, 7300 and 720XP series

Description Arista switches provide several mirroring features. Filtered mirroring to CPU adds a special destination to the mirroring features that allows the mirrored traffic to be sent to the switch supervisor. The traffic can then be monitored and analyzed locally without the need of a remote port analyzer. Use case of this feature is for debugging and troubleshooting purposes. For DCS-7050, DCS-7060, DCS-7260, DCS-7368, DCS-7300 and DCS-720XP series platforms, Most systems can be configured to mirror RX traffic, and starting in 4.24.2F can additionally do TX traffic or both Modular systems support a maximum up to 16 sessions For DCS-7280,...
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System log shows switch interfaces entering then leaving promiscuous mode; cpu error and reload days later

Hello,   We had a switch error message recently and was wondering if anyone else had a similar experience. The kernel log shows the switch interfaces entering promiscuous mode a little over two weeks prior to the cpu error. This was a packet capture done to diagnose an attached server. We have several other Top of Rack switches running the same software version without issue.   Has anyone else seem similar? Searching for these kernel dump errors has not turned up much Arista specific discussion, so that’s the reason for this post. Hopefully the question and/or answer can help someone...
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Understanding CPU Utilization

Introduction This article explains the different values from the CPU utilization output, down to the per-thread CPU usage on an Arista EOS. To this aim, we will cover the topics in different sections, as follows: How to view the CPU usage Understanding CPU Usage – Row 1 Understanding CPU Usage – Row 2 Understanding CPU Usage – Row 3 Understanding CPU Usage – Row 4 Understanding CPU Usage – Row 5 How to view CPU usage on a multi core switch? Understanding CPU Processes     1) How to view the CPU usage To view the CPU usage, use the...
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Troubleshooting High CPU Utilization

Introduction   This article aims at helping you define what is CPU load on an Arista switch, how to know when it has a high load, and help troubleshoot high CPU utilization. We will cover different topics related to High CPU utilization: How do I identify if my switch has a high CPU? What is considered normal CPU % utilization? What is example of a High CPU utilization? How to identify average load on an Arista switch? What is the difference between CPU load average and CPU utilization How to interpret the load numbers? Can the load average be greater than...
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