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Clarifications and Updates
The Management VLAN IP Address
4. Port security
5. Authorized IP Managers
6. Application features at higher levels in the OSI model, such as SSH.
(The above list does not address the mutually exclusive relationship that exists among some security
features.)
The Management VLAN IP Address
The optional Management VLAN, if used, must be configured with a manual IP address. It does not
operate with DHCP/Bootp configured for the IP address.
Interoperating with 802.1s Multiple Spanning-Tree
The ProCurve implementation of Multiple Spanning-Tree (MSTP) complies with the IEEE 802.1s
standard and interoperates with other devices running compliant versions of 802.1s. Note that the
ProCurve Series 9300 routing switches do not offer 802.1s-compliant MSTP. Thus, to support a
connection between a 9300 routing switch and a 3400cl switch running MSTP, configure the 9300
with either 802.1D (STP) or 802.1w (RSTP). For more information on this topic, refer to the chapter
titled “Spanning-Tree Operation” in the Advanced Traffic Management Guide for your 3400cl switch.
Rate-Limiting
The configured rate limit on a port reflects the permitted forwarding rate from the port to the switch
fabric, and is visible as the average rate of the outbound traffic originating from the rate-limited port.
(The most accurate rate-limiting is achieved when using standard 64-byte packet sizes.) Also, rate-
limiting reflects the available percentage of a port’s entire inbound bandwidth. The rate of inbound
flow for traffic of a given priority and the rate of flow from a rate-limited port to a particular queue
of an outbound port are not measures of the actual rate limit enforced on a port. Also, rate-limiting
is byte-based and is applied to the available bandwidth on a port, and not to any specific applications
running through the port. If the total bandwidth requested by all applications together is less than
the available, configured maximum rate, then no rate-limit can be applied. This situation occurs with
a number of popular throughput-testing software applications, as well as most regular network
applications.
As a performance consideration, implementing rate-limiting in heavy traffic situations involving QoS,
can affect overall performance. For more information on rate-limiting operation, refer to “Operating
Notes for Rate-Limiting” in the chapter titled “Port Traffic Controls ” of the Management and
Configuration Guide for your ProCurve Series 3400cl switch. (To download switch documentation,
refer to “Software Updates” on page 1.)