Ssh And Scp; Xmodem; Igmp Snooping; Jumbo Frames - HP 438031-B21 - 1:10Gb Ethernet BL-c Switch User Manual

SSH and SCP

SSH and SCP use secure tunnels to encrypt and secure messages between a remote administrator and the
switch. Telnet does not provide this level of security. The Telnet method of managing a switch does not
provide a secure connection.
SSH is a protocol that enables remote administrators to log securely into the switch over a network to
execute management commands.
SCP is used to copy files securely from one machine to another. SCP uses SSH for encryption of data on
the network. On a switch, SCP is used to download and upload the switch configuration via secure
channels.

XModem

The switch supports XModem for transferring files during direct dial-up communications. XModem sends
blocks of data in 128-byte blocks, and includes an error-detection system called a checksum. When the
data is received, the error detection system ensures that the entire message reached its destination. If not,
the receiving computer sends a request for retransmission of the data.

IGMP Snooping

The switch supports IGMP Snooping for multicasting. Version 1-, Version 2-, and Version 3-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 RJ-45 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 on 1 Gigabit ports

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.
Introduction 14