Extreme Networks ExtremeWare XOS 11.3, Руководство пользователя

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FDB Configuration Examples
ExtremeWare XOS 11.3 Concepts Guide
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Static entries—A static entry does not age and does not get updated through the learning process. A
static entry is maintained exactly as it was created. Conditions that cause dynamic entries to be
updated, such as VLAN or port configuration changes, do not affect static entries.
A locked static entry is an entry that was originally learned dynamically, but has been made static
(locked) using the MAC address lock-down feature. It is identified by the “s,” “p,” and “l” flags in
show fdb
output and can be deleted using the delete fdbentry command. See “MAC Address Lock
Down” on page 317 for more information about MAC address lock-down.
If the FDB entry aging time is set to zero, all entries in the database are considered static, non-aging
entries. This means that the entries do not age, but they are still deleted if the switch is reset.
NOTE
On the BlackDiamond 8800 family of switches (formerly known as Aspen) and the Summit X450 switch, if the same
MAC address is detected on another virtual port that is not defined in the static FDB entry for the MAC address,
that address is handled as a blackhole entry.
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Permanent entries—Permanent entries are retained in the database if the switch is reset or a power
off/on cycle occurs. Permanent entries must be created by the system administrator through the CLI.
Permanent entries are static, meaning they do not age or get updated.
FDB Configuration Examples
This section covers the following topics:
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Adding a Permanent Static Entry on page 251
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Configuring the FDB Aging Time on page 252
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Clearing FDB Entries on page 252
Adding a Permanent Static Entry
The following example adds a permanent static entry to the FDB:
create fdbentry 00:E0:2B:12:34:56 vlan marketing port 3:4
The permanent entry has the following characteristics:
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MAC address is 00:E0:2B:12:34:56.
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VLAN name is marketing .
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Slot number for this device is 3 (only on modular switches).
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Port number for this device is 4.
NOTE
On the BlackDiamond 8800 family of switches and the Summit X450 switch, if the MAC address
00:E0:2B:12:34:56 is encountered on any port/VLAN other than VLAN marketing, port 3:4, that address will be
handled as a blackhole entry, and packets from that source will be dropped.