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Cisco Bug: CSCvi20373 - n7k ICMPv6 Packet too big Messages are not send after ISSU to 8.2(1)

Last Modified

Aug 13, 2019

Products (16)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco MDS 9710 Multilayer Director
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco MDS 9148S 16G Multilayer Fabric Switch
  • Cisco MDS 9250i Multiservice Fabric Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco MDS 9396S 16G Multilayer Fabric Switch
  • Cisco Nexus 7000 18-Slot Switch
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Known Affected Releases

8.2(1)

Description (partial)

Symptom:
Higher sized IPv6 packets are dropped on Nexus 7700

Conditions:
Nexus 7700 with sup2E/M3 and an ISSU performed from 8.1(1) To 8.2(1)

Related Community Discussions

<key>CSCvi20373</key> - n7k ICMPv6 Packet too big Messages are not send after ISSU to 8.2(1)
Hello,   just in order to highlight the issue a little bit to make people aware - maybe you're seeing this as well?   Preconditions: Nexus 7x00 box, running 8.1(1) release previously (maybe also others), having switched to NX-OS 8.2(1) using ISSU (hitless software update) and running that one now. Also, &quot;ip unreachables&quot; or &quot;ipv6 unreachables&quot; option active on the respective interfaces, so the Nexus is expected to signal certain unreachability situations back to the sender of IPv4/IPv6 traffic by ...
Latest activity: Mar 05, 2018
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  • Status
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