Ask the Expert: Diagnose and Troubleshoot Hardware Failures on Cisco Nexus 7000 Series Switches

[Monica Lluis]

This session provides an opportunity to learn how to troubleshoot Hardware failures on Nexus 7000 series switches. It also enables customers to discuss various common hardware and architecture issues and solution explanation.

 
To participate in this event, please use the  button below to ask your questions

Ask questions from Monday, July 11 to Friday July 22nd, 2016

Featured Experts

Chandan Sarkar is a customer support engineer in High-Touch Technical Services (HTTS). He has over 9 years of experience in the industry working with large enterprises and telecom networks. His areas of expertise include Cisco Catalyst 2000, 3000, 4000, 6500, and Cisco Nexus 7000,Nexus 5000, Nexus 3000, Nexus 2000, UCS, and MDS SAN Switches. Sarkar holds several certifications including CCNP, VPC and other expert level certifications from Citrix, Extreme Networks, Nortel ERS, and Infoblox. He is currently working to obtain a CCIE in Data Center. He graduated with a MS degree on Systems Engineerin from Birla Institute Technology Science (BITS Pilani)

Partha Dasgupta is a customer support engineer in High-Touch Technical Services (HTTS). He has more than 14 years of experience in the industry working with large enterprises and telecom networks. His areas of expertise include Cisco Catalyst 2000, 3000, 4000, 6500, and Cisco Nexus 7000,Nexus 5000, Nexus 3000, Nexus 2000, UCS, and MDS SAN Switches. Partha holds several certifications including CCIE Data Center (53255) and other Expert level certifications from Novell CNE, ITILv4.

Chandan and Partha might not be able to answer each question due to the volume expected during this event. Remember that you can continue the conversation on the LAN Switching and Routing Community 

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[SAM ANANDARAJAH]

Hi , this is great way of sharing the issues -one man`s pain is other man`s Gain they say!!!!!!!!!!!!

we have DC -N7K  is doing the main configurations , such as VRF /VLAN - we have seen issues where at times some VLANs do have multiple mac address , where this is causing the inter DC link for some customers to be an issues , mainly this affect's the uc-apps replications - only way to over come this issue is to shut and open the vlans for the issue customers . we have had TAC case and outcome was there is a scripts in place to avoid the duplicate mac address issue . 

what would be nice is to have the ability to alarm these issues on either SMARTS or PCA . is this possible please?

also, how easy is to run elan packet capture on N7K and is there an issue on CPU during production hours?

Thank you ....

Sam

Thank you.

[chsarkar]

Hi Sam,

Reading your question, looks like you have an EEM script deployed to avoid duplicate mac issue and your ask is whether these sort of issues without any EEM script can be alarmed on either SMARTS or PCA. If my understanding is correct, I guess there is no way to achieve that.

Refer through the below CCO link and see Table 7-1

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx-os/system_management/configuration/guide/sm_nx_os_cg/sm_6callhome.html

Also to tell you, this forum is particularly on Troubleshooting Hardware issues on Nexus 7000

I would request you to post this question on the below right forum, where lot of subject matter experts can see to your request and suggest you.

https://supportforums.cisco.com/community/4816/smart-call-home

ELAM, a very powerful & non-intrusive tool that enables you to look at Cisco ASIC and understand how a packet is forwarded. 

Very easy to run, however interpretion of the ELAM data requires hardware-specific architecture and forwarding knowledge.

I am sharing the below CCO links to you to understand the ELAM Steps for M1, F1 & F2 Cards.

http://www.cisco.com/c/en/us/support/docs/switches/nexus-7000-series-switches/116645-technote-product-00.html

http://www.cisco.com/c/en/us/support/docs/switches/nexus-7000-series-switches/116647-technote-product-00.html

http://www.cisco.com/c/en/us/support/docs/switches/nexus-7000-series-switches/116646-technote-product-00.html

Regards, Chandan