Spanning Tree Protocol; Snmp; Port Mirroring; Port Trunking And Load Balancing - HP 445860-B21 - 10Gb Ethernet BL-c Switch User Manual

IMPORTANT:
maximum switch performance, HP recommends being judicious when configuring the number
of VLANs.
NOTE:

Spanning Tree Protocol

The switch supports IEEE 802.1D STP, which allows the blocking of links that form loops between switches
in a network. When multiple links between switches are detected, a primary link is established.
Duplicated links are blocked from use and become standby links. If the primary link fails, the standby link
is activated.
In addition, the switch provides a spanning tree domain per VLAN. The switch is compatible with Cisco
PVST+ and Cisco PVST, when the other device is configured as untagged or configured to use 802.1q
tagging. Thirty-two spanning tree domains are supported per switch.
NOTE:
The switch also provides IEEE 802.1s-based MSTP and IEEE 802.1w-based RSTP.

SNMP

The switch is configured and monitored remotely from an SNMP-based network management station. The
switch supports industry-standard SNMP MIBs and proprietary HP enterprise switch MIBs for fault
detection and monitoring of switch functionality. In addition, the switch supports various environmental
traps such as temperature and fan failure traps.
To secure the management interface, the switch administrator configures community strings with two levels
of access: Read and Read/Write. Access to the switch is also restricted to only management stations that
are members of a specific IP network. This is achieved by configuring the address/mask of that specific
network as a restricted management network address/mask.

Port mirroring

The switch allows mirroring of one or multiple ports (source ports) to another port (destination port) for
network monitoring and troubleshooting purposes. This technology offers a way for network packet
analyzers to view the traffic moving through the switch by providing a copy of the traffic that is currently
being passed through any other port. The packets are sent to a network packet analyzer or other
monitoring device attached to the mirror port.

Port trunking and load balancing

The switch supports EtherChannel compatible IEEE 802.3ad (without LACP) port trunking allowing several
ports to be grouped together and act as a single logical link called a trunk. This feature provides a
bandwidth that is a multiple of the bandwidth of a single link. It also improves reliability since load
balancing is automatically applied to the ports in the trunked group. A link failure within the group causes
the network traffic to be directed to the remaining links in the group.
The greater the number of VLANs, the greater the switch CPU utilization. For
VLAN 4095 is reserved for future functionality.
STP 32 is reserved for future functionality.
®
Introduction 11