HP ProCurve 2810 Series User Manual

Port Status and Basic Configuration
Jumbo Packets
Enabling or Disabling Jumbo Traffic on a VLAN
Syntax: vlan < vid > jumbo
[ no ] vlan < vid > jumbo
Configures the specified VLAN to allow jumbo packets on all
ports on the switch that belong to that VLAN. If the VLAN is
not already configured on the switch, vlan < vid > jumbo also
creates the VLAN. Note that a port belonging to one jumbo
VLAN can receive jumbo packets through any other VLAN
statically configured on the switch, regardless of whether the
other VLAN is enabled for jumbo packets. The [no] form of the
command disables inbound jumbo traffic on all ports in the
specified VLAN that do not also belong to another VLAN that
is enabled for jumbo traffic. In a VLAN context, the command
forms are jumbo and no jumbo. (Default: Jumbos disabled on
the specified VLAN.)
Operating Notes for Jumbo Traffic-Handling
■ ProCurve does not recommend configuring a voice VLAN to accept jumbo
packets. Voice VLAN packets are typically small, and allowing a voice
VLAN to accept jumbo packet traffic can degrade the voice transmission
performance.
■ You can configure the default, primary, and/or (if configured) the man-
agement VLAN to accept jumbo packets on all ports belonging to the
VLAN.
■ When the switch applies the default MTU (1522-bytes) to a VLAN, all ports
in the VLAN can receive incoming packets of up to 1522 bytes in length.
When the switch applies the jumbo MTU (9220 bytes) to a VLAN, all ports
in that VLAN can receive incoming packets of up to 9220 bytes in length.
A port receiving packets exceeding the applicable MTU drops such pack-
ets, causing the switch to generate an Event Log message and increment
the “Giant Rx” counter (displayed by show interfaces < port-list >).
■ The switch does not allow flow control and jumbo packet capability to
co-exist on a port. Attempting to configure both on the same port gener-
ates an error message in the CLI and sends a similar message to the Event
Log.
■ The default MTU is 1522 bytes (including 4 bytes for the VLAN tag). The
jumbo MTU is 9220 bytes (including 4 bytes for the VLAN tag).
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HP ProCurve 2810 Series Specifications

General

Jumbo Frame Support	Yes
Model	HP ProCurve 2810 Series
Ports	24 or 48 10/100/1000 ports
Uplink Ports	4 SFP (mini-GBIC) slots
Forwarding Rate	71.4 Mpps
Layer	Layer 2
Management	Web, SNMP, CLI
MAC Address Table Size	16000 entries
Routing Protocol	Static IP routing
Form Factor	Rack-mountable
Power Consumption	48W (24-port)
Operating Temperature	32°F to 0°F (0°C to 0°C)
Operating Humidity	15% to 95% non-condensing
Power Supply	Internal power supply