Cross Cable in Storage Foundation

[JorgeGilberto]

Hi,

I have 2 master servers that they are connected through cross cables (cluster).

I would like to know what´s the reason for that (and I if can remove one of them).

[RiaanBadenhorst · Accepted solution]

Hello,

If you're saying that you have two cluster nodes that have NetBackup Cluster configured then those cables would probably for the heartbeat communications (LLT/GAB).

You cannot remove the crossover cables. They are used to communicate the cluster status, cluster changes, updates, etc between the nodes. If you'd like to connect them to a switch instead of the direct connection that can be done if properly planned.

Please share the contents of the following file on each server

/etc/llttab

[Marianne]

Jorge, 

I see that you have a 'Partner' badge next to your name - this will give you access to Veritas PartnerNet where free training is available.

It is absolutely crucial that you understand the basic components of a cluster and how to manage a clustered application.

The manuals are also publicly available in SORT: https://sort.veritas.com/documents where you can read up about basic requirements in VCS Installation Guide.
Cluster Communications can be found in VCS Admin Guide.

The bare basic components of a cluster can be seen in the diagram in this (older) version of VCS datasheet: 
http://eval.symantec.com/mktginfo/products/Datasheets/High_Availability/cluster_server_datasheet.pdf 

[starflyfly]

Hi

 For VCS cluster,they need at least two heartbeat for LLT,to communicate information. 

 If you remove one cable, it will get into Jeopardy state, once one node leave, failover will not happen.

So you shouldn't remove cable.

[JorgeGilberto]

thks for all answers I received.

jorge