Reset Search
 

 

Article

VOSS High CPU Utilization Due to UPNP 239.255.255.250 Multicast Traffic

« Go Back

Information

 
TitleVOSS High CPU Utilization Due to UPNP 239.255.255.250 Multicast Traffic
Symptoms
  • High CPU utilization is seen or logged
0x00210587 08400001.1 DYNAMIC SET GlobalRouter KHI WARNING Pthread(smltSlave tid 5425)'s CPU 5-minute average is 82.3, above 80%
 
show khi performance cpu
---------------
    Slot:1   
         Current utilization: 79  
         1-minute average utilization: 75  
         1-minute high water mark: 75 (04/18/19 17:48:34) 
         5-minute average utilization: 52  
         5-minute high water mark: 70 (04/15/19 13:30:03)
Environment
  • VOSS platforms
  • VSP 8600
  • All supported releases
Cause
  • Product is functioning as designed
Resolution
  • Issue is due to multicast group 239.255.255.250 (UPNP) containing multiple forwarding entries on the switch
  • Recommendations to reduce the IGMP load on the system.
ip prefix-list "upnp_drop_239" 239.255.255.250/32 ge 32 le 32
interface vlan X
ip igmp access-list "upnp_drop_239" 0.0.0.0/0.0.0.0 deny-both
Additional notes
  • The multicast group 239.255.255.250 is used by the Simple Service Discovery Protocol (SSDP). Therefore, when SSDP is enabled on any servers or PCs, the servers or PCs send multicast packets with group address 239.255.255.250 to the switch.
  • In this scenario, following are the steps to disable the SSDP service on the server/PC/end station
  1. On the Control Panel , click the Administrative Tools icon, and then click the Services icon.
  2. Find out SSDP Discovery Service in the service list and disable the service.
  • If this group is in use for any of the multicast applications, then change the group address from 239.255.255.250 to any other group address.
  • If the above pointers do not stand aligning to the end user network needs, then add an IGMP static group which avoids recursive updating of the leaf list for the multicast group every time an IGMP leave request is received, thus avoiding the latency and CP switchover issues.
interface vlan 1
ip igmp static-group 239.255.255.250 4/21 static

 

Feedback

 

Was this article helpful?


   

Feedback

Please tell us how we can make this article more useful.

Characters Remaining: 255