Cisco Bug: CSCun25245 - NLB mutlicast mac unicast IP duplicated by the CPU
Last Modified
Jun 04, 2018
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(2a) 6.2(6)
Description (partial)
Symptom: Packets with Unicast IP and Multicast MAC are being duplicated on the destination interface. which can cause performance issues to the application. Conditions: on using MS NLB Option 2: Static ARP + MAC-based L2 Multicast Lookups + Static Joins + IP Multicast MAC
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