Turn on suggestions
![]() Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for
|
10-22-2018 04:31 AM
Hi
I'm sure this has been asked in past but I have not found the exect question.
we have 3 40 8GB sna switches (FOS 7.4.2a. All 3 units have trunking licenses.
So I'm looking for the best way to trunk these all together .
Is this a viable option
switch 1 port35 ---> switch 2 port35
switch 2 port38 ---> switch 3 port35
switch 3 port38 ---> switch 1 port38
so 6 ports across 3 switches each switch having a 32GB trunk
Or is there a more efficient way to trunk the 3 units together ?
any advise gratefully received
Solved! Go to Solution.
10-22-2018 05:06 AM - edited 10-22-2018 05:07 AM
Hello,
there are more SAN designs based on type which you want to use.
In this case you will use ring/mesh topology which is not best scalable. Its depend on what you want to achive and how many hops you will have between initiator and target (in this config 2 as max)
Please check if you are using same ASIC for one trunk group (you have to use port from same port group 0-7,8-15, etc..)
You can verify it with command:
porttrunkarea --show all
10-22-2018 08:22 AM - edited 10-22-2018 08:23 AM
Hi Thanks for the reply
What would be a better option to make it scalable & resiliant ? the ports used on all switches would be ports 35 & 38 which are in the same ASIC Trunk Group
Phil
10-22-2018 10:32 AM
--->>>we have 3 40 8GB sna switches....
i assume "40" is the port number ? are the switch 5100 ?
if yes, the 5100 is a single ASIC Switch
10-22-2018 10:20 PM - edited 10-22-2018 10:21 PM
Hi Antonio
yes the switches are the DS5100 40port with 8GB sfp, below is some of the output for porttrunkarea
admin> porttrunkarea --show all
Port Type State Master TI DI
-------------------------------------
0 -- -- -- 0
1 -- -- -- 1
2 -- -- -- 2
3 -- -- -- 3
4 -- -- -- 4
5 -- -- -- 5
6 -- -- -- 6
7 -- -- -- 7
-------------------------------------
8 -- -- -- 8
9 -- -- -- 9
10 -- -- -- 10
11 -- -- -- 11
12 -- -- -- 12
13 -- -- -- 13
14 -- -- -- 14
15 -- -- -- 15
What would be the better way to trunk all 3 switches if the Ring/mesh is not efficient ? we have two fabrics each with 3 DS5100's in then the san storage is conneted to both across the switch's available also most of the servers have two or more FC connetions into the fabrics
10-22-2018 10:28 PM
Trunk can ONLY! be formed in the same octet 0-7 ; 8-15 and so on
you should not created TWO trunk group in the same octet.
10-23-2018 12:23 AM
Hi Antonio
Should we only use one port in each Octet
Switch 1 ----> port 0 to Switch 2 ---> port 0
Switch 2 ---> port 8 to switch 3 -----> Port 8
Switch 3 ---> port 16 to Switch 1---> port 16
The method above is Ring,using 6 ports but is this the most efficient way ?
Or is it better to do it this way using 4 ports ?
Switch 1 --- > Port35 to switch 2 port35
Switch 2 ---> port38 to switch 3 port 35
many thanks for your input
Phil
10-23-2018 12:49 AM
NO!
Trunk must be formed in the same Octet, example:
you create a trunk of TWO port in first octet, at Port 0 and port 1 - or other port as saied beetwen 0-7
the second trunk in another octet beetwen 8-15 and so on.
theoretically ( Trunk consinst at least of TWo Port ) you can create max. 4 Trunk Group in same Octet, each of TWO port, but is recommended to use different Octet.
10-23-2018 01:07 AM
Hi Antonio
thankyou for your quick response.
I thing I undersatnd what you are saying
Switch 1 Ports 0 & 1 to switch 2 ports 0 &1
so we would have a 2 port trunk in the same Octet , but I have a 3rd switch is this just a case of using ports 35 & 38 on either switch 1 or 2 to trunk to switch 3
I'm trying to understand the best practice to trunk 3 switch's together so in the event of a switch failure the system is still efficient
or is it not a big issue as there are multipul connetions from the san storage split across 2 Fabrics ( with each fabric having 3 switch's )
and the servers have a minimum of 2 connections split across the 2 fabrics
phil
10-23-2018 02:02 AM
Since you have a DUAL Fabric, Core / EDGE topology is in you case the best solutions
One 5100 is Core, the both other 5100 will be connected as Trunk as EDGE.
connect the Storage to the Core, and all HOST to EDGE Switches