HP GbE2c HP GbE2c Layer 2/3 Ethernet Blade Switch for c-Class BladeSystem User - Page 14

IGMP Snooping, Jumbo frames, Auto-MDI/MDIX, Auto-negotiation of duplex mode and speed, Redundant - upgrade firmware

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Page 14 highlights

IGMP Snooping The switch supports IGMP Snooping for multicasting. Both Version 1- and Version 2-based IGMP Snooping are supported. In addition, auto detection of the multicast router port and manual configuration of the multicast router port is supported. For efficient multicast traffic management, the IGMP Filtering option is supported. Jumbo frames By default, the switch supports jumbo frames up to 9216 bytes, which help reduce server CPU utilization and increase application throughput. No configuration is required. The switch does not fragment frames as they exit, or assemble packets into jumbo frames as they enter the switch. Auto-MDI/MDIX The switch Ethernet ports are MDI/MDI crossover capable. MDI/MDIX is a type of Ethernet port connection using twisted pair cabling. The MDI is the component of the MAU that provides the physical and electrical connection to the cabling medium. An MDIX is a version of MDI that enables connection between like devices. MDI ports connect to MDIX ports via straight-through twisted pair cabling whereas both MDI-to-MDI and MDIX-to-MDIX connections use crossover twisted pair cabling. The switch has the capability to automatically detect the cable selection/type, making the distinction between a straightthrough cable and a crossover cable unimportant. Auto-negotiation of duplex mode and speed Auto-negotiation of duplex mode and speed are configured on the switch. Network adapters that support multiple data speeds, such as Fast Ethernet and Gigabit Ethernet, choose the speed at which they run through a procedure called auto-negotiation. Auto-negotiation involves probing the capability of the network using low-level signaling techniques to select compatible Ethernet speeds. Auto-negotiation was originally developed to make the migration from traditional Ethernet to Fast Ethernet products easier. Redundant images in firmware The switch stores up to two different software images, called image1 and image2, as well as boot software, called boot. When downloading new software, the ability to specify where it is to be placed (into image1, image2, or boot) is activated. For example, if the active image is currently loaded into image1, load the new image software into image2. This allows a test of the new software and the option to revert back to the original image stored in image1, if needed. CAUTION: Unlike the firmware that has two images, there is only one image of boot supported. Upgrading the boot image replaces the original boot image. Introduction 14

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Introduction 14
IGMP Snooping
The switch supports IGMP Snooping for multicasting. Both Version 1- and Version 2-based IGMP
Snooping are supported. In addition, auto detection of the multicast router port and manual configuration
of the multicast router port is supported. For efficient multicast traffic management, the IGMP Filtering
option is supported.
Jumbo frames
By default, the switch supports jumbo frames up to 9216 bytes, which help reduce server CPU utilization
and increase application throughput. No configuration is required. The switch does not fragment frames
as they exit, or assemble packets into jumbo frames as they enter the switch.
Auto-MDI/MDIX
The switch Ethernet ports are MDI/MDI crossover capable. MDI/MDIX is a type of Ethernet port
connection using twisted pair cabling. The MDI is the component of the MAU that provides the physical
and electrical connection to the cabling medium. An MDIX is a version of MDI that enables connection
between like devices. MDI ports connect to MDIX ports via straight-through twisted pair cabling whereas
both MDI-to-MDI and MDIX-to-MDIX connections use crossover twisted pair cabling. The switch has the
capability to automatically detect the cable selection/type, making the distinction between a straight-
through cable and a crossover cable unimportant.
Auto-negotiation of duplex mode and speed
Auto-negotiation of duplex mode and speed are configured on the switch. Network adapters that support
multiple data speeds, such as Fast Ethernet and Gigabit Ethernet, choose the speed at which they run
through a procedure called auto-negotiation. Auto-negotiation involves probing the capability of the
network using low-level signaling techniques to select compatible Ethernet speeds. Auto-negotiation was
originally developed to make the migration from traditional Ethernet to Fast Ethernet products easier.
Redundant images in firmware
The switch stores up to two different software images, called image1 and image2, as well as boot
software, called boot. When downloading new software, the ability to specify where it is to be placed
(into image1, image2, or boot) is activated.
For example, if the active image is currently loaded into image1, load the new image software into
image2. This allows a test of the new software and the option to revert back to the original image stored
in image1, if needed.
CAUTION:
Unlike the firmware that has two images, there is only one image of boot
supported. Upgrading the boot image replaces the original boot image.