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Configuring the Virtual Connect domain using the CLI 50
IGMP allows VC-Enet modules to monitor (snoop) the IP multicast membership activities and to configure
hardware Layer 2 switching behavior of multicast traffic to optimize network resource usage. Currently
only IGMP v1 and v2 (RFC2236) are supported.
The IGMP Snooping idle timeout interval is set to 260 seconds by default. This value is basically the
"Group Membership Interval" value as specified by IGMP v2 specification (RFC2236). For optimum
network resource usage, set the interval to match the configuration on the customer network's multicast
router settings.
Configuring MAC cache failover settings
• To configure MAC Cache Failover Settings, use the set mac-cache command:
>set mac-cache enabled=true refresh=10
• To dispaly MAC Cache Failover Settings, use the show mac-cache command:
>show mac-cache
When a VC-Enet uplink that was previously in standby mode becomes active, it can take several minutes
for external Ethernet switches to recognize that the c-Class server blades can now be reached on this
newly-active connection. Enabling Fast MAC Cache Failover causes Virtual Connect to transmit Ethernet
packets on newly-active links, which enables the external Ethernet switches to identify the new connection
(and update their MAC caches appropriately.) This transmission sequence repeats a few times at the
MAC refresh interval (5 seconds recommended) and completes in about 1 minute.
IMPORTANT: Be sure to set switches to allow MAC addresses to move from one port to
another without waiting for an expiration period or causing a lock out.
Logging out of the CLI
To log out of the CLI, use the exit command:
>exit
Common management operations
The following table provides the syntax for the most commonly used management operations.
For detailed information on a particular command, see "Managed elements (on page 9)."
Operation Examples
Display general domain settings
>show domain
Display predefined address pools
>show domain addresspool
Display interconnect modules
• Summary display
>show interconnect
• Detailed display
>show interconnect *
• Single module display
>show interconnect enc0:2
>show interconnect 4
Display overall domain status
>show status