Licensing Requirements and Limitations for GVRP

Involved Network Elements

Other network elements are not required.

Licensing Requirements

GVRP is a basic feature of a switch and is not under license control.

Feature Support in V200R019C10

All models of S2720, S5700, and S6700 series switches support GVRP.

For details about software mappings, visit Hardware Query Tool and search for the desired product model.

Feature Limitations

• When many dynamic VLANs need to be registered or the network radius is large, using default values of timers may cause VLAN flapping and high CPU usage. In this case, increase values of the timers. The following values are recommended depending on the number of VLANs.

  Table 1 Relationship between GARP timer values and number of dynamic VLANs that need to be registered

  Timer	Number of Dynamic VLANs to Be Registered (N)
  	N <= 500	500 < N <= 1000	1000 < N <= 1500	N > 1500
  GARP Hold timer	100 centiseconds (1 second)	200 centiseconds (2 seconds)	800 centiseconds (8 seconds)	1000 centiseconds (10 seconds)
  GARP Join timer	600 centiseconds (6 seconds)	1200 centiseconds (12 seconds)	4000 centiseconds (40 seconds)	6000 centiseconds (1 minute)
  GARP Leave timer	3000 centiseconds (30 seconds)	6000 centiseconds (1 minute)	20000 centiseconds (3 minutes and 20 seconds)	30000 centiseconds (5 minutes)
  GARP LeaveAll timer	12000 centiseconds (2 minutes)	24000 centiseconds (4 minutes)	30000 centiseconds (5 minutes)	32765 centiseconds (5 minutes and 27.65 seconds)

• The blocked port in instance 0 of STP/RSTP/MSTP can block GVRP packets; the blocked ports of other MSTIs and other ring network protocols such as ERPS, SEP, RRPP, Smart Link, and VBST cannot block GVRP packets. To ensure that GVRP runs normally and prevent GVRP loops, do not enable GVRP on the blocked port of a ring network protocol.
• The blocked ports of LBDT cannot block GVRP packets. To ensure that GVRP runs normally and prevent GVRP loops, do not enable GVRP on the blocked port of LBDT.