FDB Configuration Examples
ExtremeWare XOS 11.3 Concepts Guide
251
●
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.
●
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:
●
Adding a Permanent Static Entry on page 251
●
Configuring the FDB Aging Time on page 252
●
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:
●
MAC address is 00:E0:2B:12:34:56.
●
VLAN name is
marketing
.
●
Slot number for this device is 3 (only on modular switches).
●
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.
Summary of Contents for ExtremeWare XOS 11.3
Page 20: ...Contents ExtremeWare XOS 11 3 Concepts Guide 20...
Page 25: ...1 Using ExtremeWare XOS...
Page 26: ......
Page 38: ...ExtremeWare XOS Overview ExtremeWare XOS 11 3 Concepts Guide 38...
Page 58: ...Accessing the Switch ExtremeWare XOS 11 3 Concepts Guide 58...
Page 146: ...Configuring Slots and Ports on a Switch ExtremeWare XOS 11 3 Concepts Guide 146...
Page 218: ...Status Monitoring and Statistics ExtremeWare XOS 11 3 Concepts Guide 218...
Page 240: ...Virtual LANs ExtremeWare XOS 11 3 Concepts Guide 240...
Page 248: ...Virtual Routers ExtremeWare XOS 11 3 Concepts Guide 248...
Page 278: ...Access Lists ACLs ExtremeWare XOS 11 3 Concepts Guide 278...
Page 288: ...Routing Policies ExtremeWare XOS 11 3 Concepts Guide 288 entry deny_rest if then deny...
Page 344: ...Security ExtremeWare XOS 11 3 Concepts Guide 344...
Page 393: ...2 Using Switching and Routing Protocols...
Page 394: ......
Page 454: ...Spanning Tree Protocol ExtremeWare XOS 11 3 Concepts Guide 454...
Page 484: ...Extreme Standby Router Protocol ExtremeWare XOS 11 3 Concepts Guide 484...
Page 514: ...IPv4 Unicast Routing ExtremeWare XOS 11 3 Concepts Guide 514...
Page 530: ...IPv6 Unicast Routing ExtremeWare XOS 11 3 Concepts Guide 530...
Page 538: ...RIP ExtremeWare XOS 11 3 Concepts Guide 538...
Page 556: ...OSPF ExtremeWare XOS 11 3 Concepts Guide 556...
Page 566: ...OSPFv3 ExtremeWare XOS 11 3 Concepts Guide 566...
Page 589: ...3 Appendixes...
Page 590: ......
Page 640: ...CNA Agent ExtremeWare XOS 11 3 Concepts Guide 640...
Page 670: ...Glossary ExtremeWare XOS 11 3 Concepts Guide 670...
Page 698: ...Index ExtremeWare XOS 11 3 Concepts Guide 698...