Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 436
Con a GARP Timer, Forbidden Mode, Example of the, Command, 200ms, Leave, LeaveAll, 10000ms
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not be unconfigured when it receives a Leave PDU. Therefore, the registration mode on that interface is FIXED. • Forbidden Mode - Disables the port to dynamically register VLANs and to propagate VLAN information except information about VLAN 1. A port with forbidden registration type thus allows only VLAN 1 to pass through even though the PDU carries information for more VLANs. Therefore, if you do not want the interface to advertise or learn about particular VLANS, set the interface to the registration mode of FORBIDDEN. Based on the configuration in the following example, the interface 1/21 is not removed from VLAN 34 or VLAN 35 despite receiving a GVRP Leave message. Additionally, the interface is not dynamically added to VLAN 45 or VLAN 46, even if a GVRP Join message is received. Example of the gvrp registration Command Dell(conf-if-te-1/21)#gvrp registration fixed 34,35 Dell(conf-if-te-1/21)#gvrp registration forbidden 45,46 Dell(conf-if-te-1/21)#show conf ! interface TenGigabitEthernet 1/21 no ip address switchport gvrp enable gvrp registration fixed 34-35 gvrp registration forbidden 45-46 no shutdown Dell(conf-if-te-1/21)# Configure a GARP Timer Set GARP timers to the same values on all devices that are exchanging information using GVRP. There are three GARP timer settings. • Join - A GARP device reliably transmits Join messages to other devices by sending each Join message two times. To define the interval between the two sending operations of each Join message, use this parameter. The default is 200ms. • Leave - When a GARP device expects to de-register a piece of attribute information, it sends out a Leave message and starts this timer. If a Join message does not arrive before the timer expires, the information is de-registered. The Leave timer must be greater than or equal to 3x the Join timer. The default is 600ms. • LeaveAll - After startup, a GARP device globally starts a LeaveAll timer. After expiration of this interval, it sends out a LeaveAll message so that other GARP devices can re-register all relevant attribute information. The device then restarts the LeaveAll timer to begin a new cycle. The LeaveAll timer must be greater than or equal to 5x of the Leave timer. The default is 10000ms. Example of the garp timer Command Dell(conf)#garp timer leav 1000 Dell(conf)#garp timers leave-all 5000 Dell(conf)#garp timer join 300 Verification: Dell(conf)#do show garp timer GARP Timers Value (milliseconds) Join Timer 300 Leave Timer 1000 436 GARP VLAN Registration Protocol (GVRP)
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