Fibre Channel (SAN)

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Occasional Contributor
Posts: 9
Registered: ‎03-09-2010

How many trunk group we can have between two switches ?

How many trunk group we can have between two switches ?

We have 2 Director Switches connected with 3 trunk groups.( 2 ISL per Trunk). These 3 Trunk groups are in 3 different Blades.

Is it best way to configure Trunking ?

How can achieve optimized performance with this Trunking

Valued Contributor
Posts: 931
Registered: ‎12-30-2009

Re: How many trunk group we can have between two switches ?

Depends on what your trying to achive.

For biggest bandwith, you'll want all ISL's witin one portgroup on one blade.

From an availability standpoint you're better of with your current config which is spreading the risks across portgroups and blades.

DPS (or exchange based routing) is helping (don't know by how much) if all three trunkgroups have equal linkcosts.

If however your using Virtual Fabrics and don't want to use the base switch you'll need them as DISL's.

Do you experience performance issues or unbalanced usage for your trunks?

Super Contributor
Posts: 635
Registered: ‎04-12-2010

Re: How many trunk group we can have between two switches ?

How many trunk group we can have between two switches ? As much as you have ports.

If you have device ports in the same port group as the trunks are located and these device use heavily the trunks then you have it optimzied.

The advantage is very very very small because the traffic of that devices is not  using the backend ASICs on the director.

In general you do not have to take care where you create your trunks on a director.

My opinion is keep it simple. Two trunks on different blades are really fine and save.

This makes SAN management smart and simple.

Andreas

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