HP Serviceguard manual Automatic Port Aggregation, Example 2 If There Is No Local Switching

But if the IP Monitor detects the failure (and link-level monitoring does not) cmviewcl -voutput will look something like this:

Network_Parameters:
INTERFACE	STATUS	PATH	NAME
PRIMARY	down (disabled) (IP only)	0/3/1/0	lan2
PRIMARY	up	0/5/1/0	lan3

cmviewcl -v-f line will report the same failure like this:

node:garyinterface:lan2status=down node:garyinterface:lan2local_switch_peer=lan1 node:garyinterface:lan2disabled=true node:garyinterface:lan2failure_type=ip_only

In this case, you would need to re-enable the primary interface on each node after the link is repaired, using cmmodnet (1m); for example:

cmmodnet —e lan2

Example 2: If There Is No Local Switching

If local switching is not configured and a failure is detected by link-level monitoring, output from cmviewcl -vwill look like something like this:

Network_Parameters:
INTERFACE	STATUS	PATH	NAME
PRIMARY	down (Link and IP)	0/3/1/0	lan2
PRIMARY	up	0/5/1/0	lan3

cmviewcl -v-f line will report the same failure like this:

node:garyinterface:lan2status=down

node:garyinterface:lan2disabled=false node:garyinterface:lan2failure_type=link+ip

If local switching is not configured and a failure is detected by IP monitoring, output from cmviewcl -vwill look like something like this:

Network_Parameters:
INTERFACE	STATUS	PATH	NAME
PRIMARY	down (IP only)	0/3/1/0	lan2
PRIMARY	up	0/5/1/0	lan3

cmviewcl -v-f line will report the same failure like this:

node:garyinterface:lan2status=down

node:garyinterface:lan2disabled=false node:garyinterface:lan2failure_type=ip_only

Automatic Port Aggregation

Serviceguard supports the use of automatic port aggregation through HP-APA (Auto-Port Aggregation, HP product J4240AA). HP-APA is a networking technology that aggregates multiple physical Fast Ethernet or multiple physical Gigabit Ethernet ports into a logical link aggregate. HP-APA allows a flexible, scalable bandwidth based on multiple 100 Mbps Fast Ethernet links or multiple 1 Gbps Ethernet links (or 200 Mbps and 2 Gbps full duplex respectively). Its other benefits include load balancing between physical links, automatic fault detection, and recovery for environments which require high availability. Port aggregation capability is sometimes referred to as link aggregation or trunking. APA is also supported on dual-stack kernel.

Once enabled, each link aggregate can be viewed as a single logical link of multiple physical ports with only one IP and MAC address. HP-APA can aggregate up to 32 physical ports into one link aggregate; the number of link aggregates allowed per system is 50. Empty link aggregates will have zero MAC addresses.

You can aggregate the ports within a multi-ported networking card. Alternatively, you can aggregate ports from different cards. Figure 28 shows two examples.

How the Network Manager Works 77