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1-8 Compaq ProLiant BL p-Class GbE Interconnect Switch User Guide
COMPAQ CONFIDENTIAL Codename: Vanilla Part Number: 263680-001 Last Saved On: 4/23/02 9:55 AM
IEEE 802.1p Based Class of Service for Packet Prioritization
Class of Service (CoS) for packet prioritization allows switch administrators to set priority
levels on the GbE Interconnect Switch for forwarding packets based on the priority setting
information in the packets. The GbE Interconnect Switch supports four classes of traffic
(buffers or queues) for implementing priority and allows administrators to map eight priority
levels to the four classes. Traffic from a specific server port can be given priority over
packets from other devices according to this range of priority levels. For example, with
multiple packets in a buffer, the packet with the highest priority would be forwarded first,
regardless of when it was received.
Internet Group Management Protocol Snooping
Internet Group Management Protocol (IGMP) snooping, when enabled and configured
properly, manages multicast traffic in a GbE Interconnect Switch by allowing directed
switching of the IP multicast traffic. The GbE Interconnect Switch can use IGMP Snooping
to configure ports dynamically, so that IP multicast traffic is forwarded only to those ports
associated with IP multicast hosts.
IGMP Snooping allows the GbE Interconnect Switch to recognize IGMP queries and reports
sent between network stations or devices and an IGMP host that belong to a specific multicast
group. When enabled for IGMP Snooping, the GbE Interconnect Switch can open or close a
port to a specific device based on IGMP messages passing through the module. This feature
further limits unnecessary broadcasts.
Dynamic Host Configuration Protocol or Bootstrap Protocol
By default, the GbE Interconnect Switch is configured to obtain an IP address from a
Dynamic Host Configuration Protocol (DHCP) or Bootstrap Protocol (BOOTP) server during
the boot process. The IP settings can also be manually configured by means of the console
interface. The IP settings are also configurable from other interfaces, such as the Web, but
because the connection is based on an IP address for these interfaces, users will have to
reconnect with the newly assigned IP address.
External Components
This section describes the front panel of the ProLiant BL p-Class GbE Interconnect Switch,
the QuadT Interconnect Module Panel, and the DualTSX Interconnect Module Panel.