Brocade Communications Systems ICX 7250 series, Configuration Manual

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SNTP packets
To specify the lowest-numbered IP address configured on a virtual interface as the device source for all SNTP packets, enter commands
such as the following.
device(config)# interface ve 1
device(config-vif-1)# ip address 10.0.0.5/24
device(config-vif-1)# exit
device(config)# ip sntp source-interface ve 1
The commands in this example configure virtual interface 1, assign IP address 10.0.0.5/24 to the interface, then designate the
interface's address as the source address for all SNTP packets.
Syntax: [no] ip sntp source-interface { ethernet unit / slot / port | loopback num | management num | ve num }
The default is the lowest-numbered IP or IPv6 address configured on the port through which the packet is sent. The address therefore
changes, by default, depending on the port.
SNMP packets
To specify a loopback interface as the SNMP single source trap, enter commands such as the following.
device(config)# interface loopback 1
device(config-lbif-1)# ip address 10.0.0.1/24
device(config-lbif-1)# exit
device(config)# snmp-server trap-source loopback 1
The commands in this example configure loopback interface 1, assign IP address 10.00.1/24 to the loopback interface, then designate
the interface as the SNMP trap source for this device. Regardless of the port the Brocade device uses to send traps to the receiver, the
traps always arrive from the same source IP address.
Syntax: [no] snmp-server trap-source { ethernet unit / slot / port | loopback num | ve num }
Configuring delay time for notifying VE down event
When all the ports in the VLAN go into an inactive state (for example, the non-forwarding state), the device notifies the Layer 3 protocols
of the VE down event only after the configured timer expires. Once the timer expires, the device checks if any of the ports is in the
forwarding state. If no ports are in the forwarding state, the device notifies the Layer 3 protocols of the VE down event. If any of the ports
is in the forwarding state, the device ignores the down event.
While the timer is running, if any of the ports comes into forwarding state, the device cancels the timer and does not notify the VE down
event to the protocols.
NOTE
In the case of multiple flaps, if any of the ports comes into forwarding state before the delay notification timer expiry then the
device cancels the timer and a fresh timer is started during port down event. Incase of continuous flaps where flap time is less
than delay notification timer, the flaps can be detected by other methods like port statistics or drop in traffic or by the
convergence logs of layer2 loop detection protocols.
Suppressing the link status notification allows a quick port status change and recovery to occur without triggering any of the changes that
are necessary when a port stays down.
By default, the delay time is not configured.
NOTE
Configuring delayed Layer 3 notifications on the VE feature is supported on ICX 7250, ICX 7450, and ICX 7750. product
families from Brocade.
Configuring IP parameters - Layer 3 switches
Brocade FastIron Layer 3 Routing Configuration Guide
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