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Cisco Bug: CSCur11844 - N7K link flaps when connected to 10G DWDM Circuit

Last Modified

May 15, 2020

Products (8)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch

Known Affected Releases

6.2(8a)

Description (partial)

Symptom:
Issue seen with 6.2.8(a). When bringing a up 10G DWDM link between N7Ks connected over a Siemens WAN the links flap repeatedly until they go link flap error-disabled.

Conditions:
Conditions: Issue reported with Image : 6.2.8(a) 
Product : Nexus 7k
Modules : Reported on F2 series

N7K using a 10Gig LR connected to a Siemens DWDM.

Related Community Discussions

Link flaps when connected through 10G DWDM Circuit
Hello team,   We have a problem with link flapping between Cisco switches which are connected via 3rd party DWDM network: Switch  &lt;--&gt; 10G DWDM &lt;--&gt; Switch   Initially these were N7K switches. Such behavior was known and there is a work around for it ( https://bst.cloudapps.cisco.com/bugsearch/bug/<key>CSCur11844</key>/?referring_site=bugquickviewclick ). We increased the link debounce timer and it helped perfectly.   Now we have another problem, one of the switches connected to N7K through DWDM network is ...
Latest activity: Jul 24, 2018
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