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Stackable NWay Ethernet Switch User's Guide
Read-write MIBs are variables usually related to user-customized
configurations. Examples of these are the Switch's IP Address,
Spanning Tree Algorithm parameters, and port status.
If you use a third-party vendors' SNMP software to manage the
Switch, a diskette listing the Switch's propriety enterprise MIBs can
be obtained by request. If your software provides functions to browse
or modify MIBs, you can also get the MIB values and change them (if
the MIBs' attributes permit the write operation). This process
however can be quite involved, since you must know the MIB OIDs
and retrieve them one by one.
Packet Forwarding
The Switch learns the network configuration and uses this
information to forward packets. This reduces the traffic congestion on
the network, because packets, instead of being transmitted to all
segments, are transmitted to the destination only. Example: if Port
1 receives a packet destined for a station on Port 2, the Switch
transmits that packet through Port 2 only, and transmits nothing
through the other ports.
Aging Time
The Aging Time is a parameter that affects the auto-learn process of
the Switch in terms of the network configuration. Dynamic Entries,
which make up the auto-learned-node address, are aged out of the
address table according to the Aging Time that you set.
The Aging Time can be from 10 seconds to 9999 seconds. A very long
Aging Time can result with the out-of-date Dynamic Entries that
may cause incorrect packet filtering/forwarding decisions.
Switch Management Concepts
33
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