Dell Force10 MXL Blade - Important Points to Remember

218 | GARP VLAN Registration (GVRP)
www.dell.com | support.dell.com
Important Points to Remember
• GVRP is supported on Layer 2 ports only.
• All VLAN ports added by GVRP are tagged.
• GVRP is supported on untagged ports belonging to a default VLAN, and tagged ports.
• GVRP cannot be enabled on untagged ports belonging to a non-default VLAN unless native
VLAN is turned on.
• GVRP requires end stations with dynamic access network interface controller (NICs).
• Based on updates from GVRP-enabled devices, GVRP allows the system to dynamically create a
port-based VLAN (unspecified) with a specific VLAN ID and a specific port.
• On a port-by-port basis, GVRP allows the system to learn about GVRP updates to an existing
port-based VLAN with that VLAN ID and IEEE 802.1Q tagging.
• GVRP allows the system to send dynamic GVRP updates about your existing port-based VLAN.
• GVRP updates are not sent to any blocked spanning tree protocol (STP) ports. GVRP operates
only on ports that are in the forwarding state.
• GVRP operates only on ports that are in the STP forwarding state. If GVRP is enabled, a port that
changes to the STP forwarding state automatically begins to participate in GVRP. A port that
changes to an STP state other than forwarding no longer participates in GVRP.
• VLANs created dynamically with GVRP exist only as long as a GVRP-enabled device is sending
updates. If the devices no longer send updates, or GVRP is disabled, or the system is rebooted, all
dynamic VLANs are removed.
• GVRP manages the active topology, not non-topological data such as VLAN protocols. If a local
bridge needs to classify and analyze packets by VLAN protocols, you must manually configure
protocol-based VLANs, and simply rely on GVRP for VLAN updates. But if the local bridge
needs to know only how to reach a given VLAN, then GVRP provides all necessary information.
• The VLAN topologies that GVRP learns are treated differently from VLANs that are statically
configured. The GVRP dynamic updates are not saved in NVRAM, while static updates are saved
in NVRAM. When GVRP is disabled, the system deletes all VLAN interfaces that were learned
through GVRP and leaves unchanged all VLANs that were manually configured.
clear gvrp statistics
Clear GVRP statistics on an interface.
Syntax
clear gvrp statistics interface interface
Parameters
Defaults
none
Command Modes
EXEC
Command
History
interface interface
Enter the following keywords and slot/port or number information:
• For a Port Channel interface, enter the keyword
port-channel followed
by a number: Range: 1 to 128
• For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet followed by the slot/port information.
• For a 40-Gigabit Ethernet interface, enter the keyword
fortyGigE
followed by the slot/port information.
Version 8.3.16.1 Introduced on MXL 10/40GbE Switch IO Module