Cisco Bug: CSCum09730 - 69XX - IP release and phone deregisters during Multicast flooding
Last Modified
May 11, 2016
Products (35)
- Cisco IP Phone 8800 Series
- Cisco Unified IP Phone 9951
- Cisco Unified IP Phone 7962G
- Cisco Unified IP Phone 7945G
- Cisco Unified Wireless IP Phone 7920
- Cisco Unified IP Phone 7971G-GE
- Cisco Unified IP Phone Expansion Module 7914
- Cisco Unified IP Phone 6941
- Cisco Unified IP Phone 7941G
- Cisco Unified IP Phone 6961

Known Affected Releases
9.3(3)
Description (partial)
Symptom: Multicast traffic is limited on 69xx. The multicast traffic is going from the 69xx network port to a PC connected on the PC port, same phone. The speed for the multicast transmission decreases a lot when the phone is in between if there is no phone connected, the transmission speed for multicast traffic is about 10 -12 MB When the phone is there, the speed reduces to 2MB Conditions: 69xx processing multicast traffic and passing them to the PC port firmware 9.3.3
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