Advanced Traffic Management Guide K/KA/KB.15.15

You also have the option of resetting the DSCP (DiffServe Codepoint) on tagged
voice VLAN traffic moving through the switch.
If all port memberships on the voice VLAN are tagged:
• The priority level set for voice VLAN traffic is carried to the next device.
• You can enforce a QoS priority policy moving through the switch and network.
Configuring a VLAN MAC address with heartbeat interval
When installing HP routing switches in the place of existing routers in a network configuration,
you can achieve Layer 3 VLAN migration by using the ip-recv-mac-address command at the
VLAN configuration level to:
• Configure the MAC address of the previously installed router on each VLAN interface of an
HP routing switch.
• Optionally configure the time interval to use for sending heartbeat packets with the configured
MAC address.
Syntax:
[no] ip-recv-mac-address mac-address [ interval seconds ]
Configures a VLAN interface with the specified MAC address. Enter the no version
of the command to remove the configured MAC address and return to the original
MAC address of the HP switch.
interval seconds (Optional) Configures the time interval in seconds used
between transmissions of heartbeat packets to all network
devices configured on the VLAN. Valid values are from
one to 255 seconds.
Default: 60 seconds.
Viewing a VLAN MAC address configuration
Syntax:
show ip-recv-mac-address
Example 34 Viewing a VLAN MAC address
HP Switch#: show ip-recv-mac-address
VLAN L3-Mac-Address Table
VLAN L3-Mac-Address Timeout
------------- ------------------------ -----------
DEFAULT_VLAN 001635-024467 60
VLAN2 001635-437529 100
About static VLAN operation
A group of networked ports assigned to a VLAN form a broadcast domain configured on the
switch. On a given switch, packets are bridged between source and destination ports that belong
to the same VLAN. Thus, all ports passing traffic for a particular subnet address should be configured
to the same VLAN. Cross-domain broadcast traffic in the switch is eliminated and bandwidth is
saved by not allowing packets to flood out all ports.
Configuring a VLAN MAC address with heartbeat interval 41