topic Re: High Available Network in Operating System - HP-UX

High Available Network

Shivkumar — Fri, 20 Jan 2006 09:30:34 GMT

Is there a High Available Network ? If yes, then how it is achieved in an HPUX environment ?

Re: High Available Network

Geoff Wild — Fri, 20 Jan 2006 09:35:42 GMT

It's called APA:

http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=J4240AA

Rgds...Geoff

Re: High Available Network

Jeff_Traigle — Fri, 20 Jan 2006 09:39:20 GMT

Depends what you mean. From an HP-UX perspective, HA for network could involve either Serviceguard or APA. But for a network to be truly HA requires a lot of redundancies in the network equipment and paths, which is outside HP-UX. With the use of multiple routers, dynamic routing with gated could also be utilized by HP-UX. (Haven't actually seen that done in the two SG environments I've worked in, but read about it in the CSE study guide and seemed pretty straight-forward.)

Re: High Available Network

Raj D. — Fri, 20 Jan 2006 09:53:14 GMT

Hi Shiv ,

Good day!!

This can be achieved with using HP Auto Port Aggregation product.

HP APA provides the following key benefits:--------------------------------------------

Bandwidth scalability: Allows scaling of networks to improve aggregate throughput.
High availability: Provides redundancy or link aggregation of network ports.
Load balancing: Supports load balancing and failure recovery capabilities and distributes traffic evenly across the aggregated links, based on IP, TCP Port, or MAC address.
Single MAC address: Assigns one single logical MAC address to an aggregate and all its ports.
Flexibility: Allows addition and deletion of ports in an aggregate to achieve desired performance whenever needed.
Investment protection: Utilizes Ethernet technology, which provides a natural upgrade path for current Ethernet installations, leveraging existing end-stations, management tools and training.
Lower IT costs: Provides automated configuration and management tools using the IEEE 802.3ad or PAgP standards.

Details you can check in the link:

http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.
do?productNumber=J4240AA

Cheers,
Raj.

Re: High Available Network

Cem Tugrul — Fri, 20 Jan 2006 09:57:54 GMT

Hi Shiv,

i know the other replies are more significant
but also would be nice to start "HA" consept
and many docs below the link.

http://www.docs.hp.com/en/ha.html#Serviceguard%20Extension%20for%20Faster%20Failover

Good Luck,

Re: High Available Network

Lolupee — Fri, 20 Jan 2006 10:03:51 GMT

You can achieve either using APA or your HA Cluster software even if it is one node.

One node cluster with several network card and good network hardware routing would achieve the goal.
APA is very good for network availability for application on a server not clustered. Service guard is good for both database and application in a cluster. APA not commonly used in a cluster.

Re: High Available Network

Cem Tugrul — Fri, 20 Jan 2006 10:09:45 GMT

Lolupee is right...While we were setting
HA between 2 of my criticcal nodes at once
we had been installed apa with MC/Service Guard but later we removed it because we
understood that we did not need it...

Good Luck,