BLADE OS™ Application Guide HP GbE2c Ethernet Blade Switch for c-Class BladeSystem Version 5.1 Advanced Functionality Software

BLADE OS 5.1 Application Guide
108  Chapter 4: VLANs BMD00113, September 2009
FDB Static Entries
Static entries in the Forwarding Database (FDB) allow the switch to forward packets without
flooding ports to perform a lookup. A FDB static entry is a MAC address associated with a specific
port and VLAN. The switch supports 128 static entries. Static entries are manually configured,
using the following command: /cfg/l2/fdb/static
FDB static entries are permanent, so the FDB Aging value does not apply to them. Static entries are
manually added to the FDB, and manually deleted from the FDB.
Incoming frames that contain the static entry as the source MAC can use only ports configured for
the static entry.
Trunking Support for FDB Static Entries
A FDB static entry can be added to a port that is a member of a trunk group, as follows:
 Static (manually configured) trunk group
 Dynamic (LACP) trunk group
The trunk group supports the FDB static entry. If the port with the static entry fails, other ports in
the trunk handle the traffic. If the port is removed from the trunk, the static entry is removed from
the trunk, but remains configured on the port.
The FDB information commands (/info/l2/fdb) display trunk support for static FDB entries,
if applicable. For example:
Configuring a Static FDB Entry
Perform the following actions to configure a static FDB entry:
>> Forwarding Database# dump
MAC address VLAN Port Trnk State Permanent
----------------- ---- ---- ---- -----
00:00:2e:9b:db:f8 1 1 TRK
00:00:5e:00:01:f4 1 21 FWD
00:01:81:2e:b5:60 1 21 FWD
00:02:a5:e9:76:30 1 1 TRK
...
Main# /cfg/l2/fdb/static (Select static FDB menu)
>> Static FDB# add 00:60:af:00:02:30
Enter VLAN number: 2
Enter port (1-24): 2
>> Static FDB# apply (Apply the configuration)
>> Static FDB# save (Save the configuration)