HP Integrity rx2800 HP Integrity Network Adapter Teaming Whitepaper - Page 45

Active Path Configuration, Directed ARP Configuration

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Active Path Configuration To use Active Path, an SA must enable it on a per-team basis from the Advanced Redundancy tab located on the HP Integrity Network Adapter Teaming configuration GUI. Next, the SA should select which Active Path mechanism to use - Directed ARP or Community Address ARP from the Echo Node Response Mechanism drop-down box. For both Directed ARP and Community Address ARP, an IP address for an appropriate Echo Node must be provided in the Echo Node IP Address field. Optionally, a user can specify the MAC address of the Echo Node. If the Echo Node MAC address is configured, Echo Node probes will be transmitted using this MAC address as the destination MAC address in the Ethernet header. This may be desired by the implementer in order to prevent the Echo Node probes from being transmitted as broadcast frames. The downside is that this field must be manually updated should the MAC address of the Echo Node ever change. An implementer may also manually adjust the timers for the Echo Node probe interval and Echo Node probe timeout. Echo Node probe interval determines how often an Echo Node probe is transmitted to the Echo Node. The default is 3 seconds. Echo Node timeout determines the number of seconds each team member will wait for the Echo Node probe reply before assuming the team member should be considered Active Path Failed. With the default values, six seconds is the longest it should take for a team to detect a fault between a teamed port and the Echo Node. Directed ARP Configuration: To enable Active Path's Directed ARP mechanism, select Directed ARP from the Echo Node Response Mechanism drop-down box and provide the IP address of the designated Echo Node. Other than the configuration requirements described in the previous section, no other Directed ARP specific configuration is required. Directed ARP guidelines: Not all network devices (for example, Cisco routers) will function as Echo Nodes. If this situation is encountered, HP recommends using Community Address ARP instead of Directed ARP. Types of HP Integrity Network Adapter Teams 45

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Active Path Configuration
To use Active Path, an SA must enable it on a per-team basis from the Advanced Redundancy
tab located on the HP Integrity Network Adapter Teaming configuration GUI. Next, the SA
should select which Active Path mechanism to use – Directed ARP or Community Address ARP
from the Echo Node Response Mechanism drop-down box.
For both Directed ARP and Community Address ARP, an IP address for an appropriate Echo
Node must be provided in the Echo Node IP Address field. Optionally, a user can specify the
MAC address of the Echo Node. If the Echo Node MAC address is configured, Echo Node probes
will be transmitted using this MAC address as the destination MAC address in the Ethernet
header. This may be desired by the implementer in order to prevent the Echo Node probes from
being transmitted as broadcast frames. The downside is that this field must be manually updated
should the MAC address of the Echo Node ever change.
An implementer may also manually adjust the timers for the Echo Node probe interval and Echo
Node probe timeout. Echo Node probe interval determines how often an Echo Node probe is
transmitted to the Echo Node. The default is 3 seconds. Echo Node timeout determines the
number of seconds each team member will wait for the Echo Node probe reply before assuming
the team member should be considered Active Path Failed. With the default values, six seconds
is the longest it should take for a team to detect a fault between a teamed port and the Echo Node.
Directed ARP Configuration:
To enable Active Path’s Directed ARP mechanism, select
Directed ARP
from the Echo Node
Response Mechanism drop-down box and provide the IP address of the designated Echo Node.
Other than the configuration requirements described in the previous section, no other Directed
ARP specific configuration is required.
Directed ARP guidelines: Not all network devices (for example, Cisco routers) will function as
Echo Nodes. If this situation is encountered, HP recommends using Community Address ARP
instead of Directed ARP.
Types of HP Integrity Network Adapter Teams
45