Alcatel OS6400-24 Guía de usuario descargar pdf (Pagina 19)

August 2008

OmniSwitch 6400 ------ Release 6.3.3.R01 Page 19 of 55

and troubleshooting of end-to-end Ethernet service instances, while Link OAM allows a provider to

monitor and troubleshoot an individual Ethernet link. The end-to-end service management capability is the

most important aspect of Ethernet OAM for service providers.

The IEEE 802.1ag draft 7.0 standard is supported.

Generic UDP Relay

In addition to BOOTP/DHCP relay, generic UDP relay is available. Using generic UDP relay, traffic

destined for well-known service ports (e.g., NBNS/NBDD, DNS, TFTP, and TACACS) or destined for a

user-defined service port can be forwarded to a maximum of 256 VLANs on the switch.

Generic Routing Encapsulation

Generic Routing Encapsulation (GRE) is a tunneling protocol that can encapsulate a wide variety of

protocol packet types inside IP tunnels. GRE is used to create a virtual point-to-point link between routers

at remote points in a network. This feature supports the creation, administration, and deletion of IP

interfaces whose underlying virtual device is a GRE tunnel.

GVRP

The GARP VLAN Registration Protocol (GVRP), a protocol compliant with 802.1Q, dynamically learns

and further propagates VLAN membership information across a bridged network. GVRP dynamically

maintains and updates the registration and de-registration of VLANs and prunes unnecessary broadcast and

unicast traffic. Through propagation of GVRP information, a device is continuously able to update its

knowledge of the set of VLANs that currently have active members and of the ports through which those

members can be reached.

Using GVRP, a single switch is manually configured with all the desired VLANs for the network, and all

other switches on the network dynamically learn those VLANs. An end station can be plugged into any

switch and can be connected to its desired VLAN. However, for end stations to make use of GVRP, they

need Network Interface Cards (NIC) aware of GVRP. A trap will be sent if the number of dynamic VLANs

exceeds the maximum threshold configured for GVRP.

Health Statistics

To monitor resource availability, the NMS (Network Management System) needs to collect significant

amounts of data from each switch. As the number of ports per switch (and the number of switches)

increases, the volume of data can become overwhelming. The Health Monitoring feature can identify and

monitor a switch’s resource utilization levels and thresholds, improving the efficiency in data collection.

Health Monitoring provides the following data to the NMS:

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