2 NIC's and ONE IP-address

[Thomas Greig]

is it possible to have two network-cards in
a hp-ux visualize C3750, and have them sharing one IP-address.. -to give the hp-ux more bandwidth?

Thomas Greig

[Sanjay Kumar Suri · Accepted solution]

I think it is possible through APA - Auto port aggregation which gives following benefits:

1 IP address for all aggregated links
Link Failures are transparent to clients
Load Balancing
Automatic Fault Detection and Recovery

sks

[Duncan Edmonstone]

As Sanjay mentions, you need APA to do this - take a look at this link:

http://www.hp.com/products1/unixserverconnectivity/adapters/apa_overview.html

Of course your network switch has to support one of the link aggregation protocols described there, and this software costs $$$

HTH

Duncan

[Ravi_8]

Hi Thomas

This is possible using APA as stated by others

[Francois Genolini]

The web page for HP Auto-Port Aggregation (APA) says that all LAN card "share the same MAC address".
Is this right?
Should it not be "share the same IP address"?

[Geoff Wild]

Yes - with APA:

HP Auto Port Aggregation Features
Link Aggregates, often called â trunks,â provide a logical grouping of 2 or
more physical ports into a single â Fat-Pipeâ with a single IP address. Two
primary features are automatic link failure detection and recovery as
well as optional support for load balancing of network traffic across all of
the links in the aggregation. This allows you to build large bandwidth
â logicalâ links into the server that are highly available and completely
transparent to the client and server applications.

HP APA Configuration Examples
Here are some points to remember when configuring HP APA:
â ¢ HP APA combines two to four physical link ports into one logical
aggregation of links when using FEC_AUTO or MANUAL link
aggregation. This gives the link aggregation a theoretical bandwidth
of four times that of a single physical link. When using an
LACP_AUTO link aggregation, as many as 32 physical links may be
used in a link aggregation.
â ¢ 100BT or Gigabit devices may be used in the link aggregation.
However, all the devices in the link aggregation must be of one type,
100BT or Gigabit. And the physical devices in the link aggregation
must be configured for the same speed and duplex. (Note: EISA
100BT devices are not supported.)
â ¢ The link aggregation has one or more IP addresses assigned to it in
the /etc/rc.config.d/netconf file.
â ¢ The physical ports in the link aggregation will use the same MAC
address.
â ¢ HP APA distributes the outbound network traffic across the physical
links in the link aggregation using a load ba

[Geoff Wild]

Let us try that again:

HP Auto Port Aggregation Features
Link Aggregates, often called â trunks,â provide a logical grouping of 2 or
more physical ports into a single â Fat-Pipeâ with a single IP address. Two
primary features are automatic link failure detection and recovery as
well as optional support for load balancing of network traffic across all of
the links in the aggregation. This allows you to build large bandwidth
â logicalâ links into the server that are highly available and completely
transparent to the client and server applications.

HP APA Configuration Examples
Here are some points to remember when configuring HP APA:
â ¢ HP APA combines two to four physical link ports into one logical
aggregation of links when using FEC_AUTO or MANUAL link
aggregation. This gives the link aggregation a theoretical bandwidth
of four times that of a single physical link. When using an
LACP_AUTO link aggregation, as many as 32 physical links may be
used in a link aggregation.
â ¢ 100BT or Gigabit devices may be used in the link aggregation.
However, all the devices in the link aggregation must be of one type,
100BT or Gigabit. And the physical devices in the link aggregation
must be configured for the same speed and duplex. (Note: EISA
100BT devices are not supported.)
â ¢ The link aggregation has one or more IP addresses assigned to it in
the /etc/rc.config.d/netconf file.
â ¢ The physical ports in the link aggregation will use the same MAC
address.
â ¢ HP APA distributes the outbound network traffic across the physical
links in the link aggregation using a load balancing algorithm.
Effective APA load balancing requires many simultaneous, active
client connections.
It is the connections that are distributed across the physical links.
One client connection will have its traffic sent on one physical link.
The connection is defined by the load balancing algorithm.
â ¢ The link partners (switches, routers, or remote servers) completely
control inbound load balancing.
â ¢ There are three load balancing algorithms from which to choose:
MAC-address-based-, IP-address-based-, and
TCP/UDP-port-address-based load balancing algorithms. See
Appendix B: â Load Balancing and Data Flow Algorithmsâ for more
information.
â ¢ HP APA link aggregations provide for migrating the network traffic
on a failed physical link in the aggregation to the remaining
ope

[Geoff Wild]

cut and paste sucks....

Here, just go to this link:

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/J4240-90016/J4240-90016_top.html&con=/hpux/onlinedocs/J4240-90016/00/00/1-con.html&toc=/hpux/onlinedocs/J4240-90016/00/00/1-toc.html&searchterms=J4240-90016&queryid=20040203-065839

Rgds...Geoff