Enabling Periodic Gateway Probe; Specifying The Ip Addresses Of Servers - HP FlexFabric 5700 Series Security Configuration Manual

Step
2. Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view.
3. Configure the port as a
network port.

Enabling periodic gateway probe

You can configure the MFF device to detect gateways periodically for the change of MAC addresses by
sending forged ARP packets. The ARP packets use 0.0.0.0 as the sender IP address and bridge MAC
address as the sender MAC address.
The interval for sending gateway probes is 30 seconds.
To enable periodic gateway probe:
Step
1. Enter system view.
2. Enter VLAN view.
3. Enable periodic gateway
probe.

Specifying the IP addresses of servers

You must specify the servers on the MFF device to ensure communication between the servers and clients.
When the MFF device receives an ARP request from a server, the MFF device searches IP-to-MAC address
entries it has stored. Then the device replies with the requested MAC address to the server. As a result,
packets from a host to a server are forwarded by the gateway. However, packets from a server to a host
are not forwarded by the gateway.
MFF does not check whether the IP address of a server is on the same network segment as that of a
gateway. Instead, it checks whether the IP address of a server is all-zero or all-one. An all-zero or all-one
server IP address is invalid.
NOTE:
If the server's interface connecting to the MFF device uses secondary IP addresses to send ARP packets,
include all these IP addresses in the server IP address list.
To specify the IP addresses of servers:
Command
•
Layer 2 Ethernet interface
view:
interface interface-type
interface-number
•
Layer 2 aggregate interface
view:
interface bridge-aggregation
interface-number
mac-forced-forwarding
network-port
Command
system-view
vlan vlan-id
mac-forced-forwarding gateway
probe
378
Remarks
N/A
By default, the port is a user port.
Remarks
N/A
N/A
By default, this feature is
disabled.