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Fibre Channel (SAN)

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Anonymous
Posts: 0

Re: ISL Data Flow

Hi -

unless you have made changes, from FSPF point of view both trunks have the same cost (= 500, see topologyshow). So both trunks will be used at the same time.

Traffic balance between trunks will depend on aptpolicy (see drawings attached before in this thread).

With default configuration (aptpolicy 3 0), there will be 4 times much more FC exchanges on 32G trunk compared to 8G trunk.

Kind regards,

--

david

Highlighted
Anonymous
Posts: 0

Re: ISL Data Flow

Hi David,

Thanks.

I checked on switches for aptpolicy and topologyshow both are same as you said. So it means more data will flow on 32G trunk as compair to 8G.

SW1:yad> aptpolicy
Current Policy: 3 0(ap)

3 0(ap): Default Policy
1: Port Based Routing Policy
3: Exchange Based Routing Policy
         0: AP Shared Link Policy
         1: AP Dedicated Link Policy
SW1:yad>

SW1:yad> topologyshow

2 domain(s) in the fabric; Local Domain ID: 102

Domain:         101
Metric:         500
Name:           SW01
Path Count:     2

        Hops:                   1
        Out Port:               10/13
        In Ports:               2/0 2/1 2/2 2/3 2/4 2/5 2/6 2/7 2/8 2/9 2/10 2/11 2/12 2/13 2/14 2/15
                                3/0 3/1 3/2 3/3 3/4 3/5 3/7 3/8 3/9 3/10 3/11 3/12 3/13 3/14 3/15 4/0
                                4/1 4/2 4/3 4/4 4/5 4/6 4/7 4/9 4/10 4/11 4/12 4/13 4/14 4/15 7/0 7/1
                                7/3 7/4 7/5 7/6 7/7 7/8 7/9 7/11 7/12 7/13 7/14 7/15 8/0 8/1 8/2 8/3
                                8/4 8/5 8/6 8/7 8/8 8/9 8/10 8/12 8/13 8/14 8/15 9/0 9/1 9/2 9/3 9/4
                                9/5 9/6 9/7 9/8 9/9 9/10 9/11 9/12 9/13 9/14 9/15 2/18 2/19 2/20 2/21 2/22
                                2/23 2/24 2/25 2/26 2/27 2/28 2/29 2/30 2/31 3/16 3/17 3/18 3/19 3/20 3/22 3/23
                                3/25 3/26 3/27 3/28 3/29 3/30 3/31 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24
                                4/25 4/26 4/27 4/28 4/29 4/30 4/31 7/16 7/17 7/18 7/19 7/20 7/21 7/22 7/23 7/24
                                7/25 7/26 7/27 7/28 7/29 7/30 7/31 8/16 8/17 8/18 8/19 8/20 8/21 8/22 8/23 8/24
                                8/25 8/27 8/28 8/29 8/30 8/31 9/16 9/17 9/18 9/19 9/20 9/21 9/22 9/23 9/24 9/25
                                9/26 9/27 9/28 9/29 9/30 9/31
        Total Bandwidth:        32.000 Gbps
        Bandwidth Demand:       1745 %
        Flags:                  D

        Hops:                   1
        Out Port:               2/16
        In Ports:               2/0 2/1 2/2 2/3 2/4 2/5 2/6 2/7 2/8 2/9 2/10 2/11 2/12 2/13 2/14 2/15
                                3/0 3/1 3/2 3/3 3/4 3/5 3/7 3/8 3/9 3/10 3/11 3/12 3/13 3/14 3/15 4/0
                                4/1 4/2 4/3 4/4 4/5 4/6 4/7 4/9 4/10 4/11 4/12 4/13 4/14 4/15 7/0 7/1
                                7/3 7/4 7/5 7/6 7/7 7/8 7/9 7/11 7/12 7/13 7/14 7/15 8/0 8/1 8/2 8/3
                                8/4 8/5 8/6 8/7 8/8 8/9 8/10 8/12 8/13 8/14 8/15 9/0 9/1 9/2 9/3 9/4
                                9/5 9/6 9/7 9/8 9/9 9/10 9/11 9/12 9/13 9/14 9/15 2/18 2/19 2/20 2/21 2/22
                                2/23 2/24 2/25 2/26 2/27 2/28 2/29 2/30 2/31 3/16 3/17 3/18 3/19 3/20 3/22 3/23
                                3/25 3/26 3/27 3/28 3/29 3/30 3/31 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24
                                4/25 4/26 4/27 4/28 4/29 4/30 4/31 7/16 7/17 7/18 7/19 7/20 7/21 7/22 7/23 7/24
                                7/25 7/26 7/27 7/28 7/29 7/30 7/31 8/16 8/17 8/18 8/19 8/20 8/21 8/22 8/23 8/24
                                8/25 8/27 8/28 8/29 8/30 8/31 9/16 9/17 9/18 9/19 9/20 9/21 9/22 9/23 9/24 9/25
                                9/26 9/27 9/28 9/29 9/30 9/31
        Total Bandwidth:        8.000 Gbps
        Bandwidth Demand:       1745 %
        Flags:                  D

Type <CR> to continue, Q<CR> to stop: q

Regards

Yad

Anonymous
Posts: 0

Re: ISL Data Flow

Yes.

And you should see it by monitoring real time traffic with portperfshow 5 for instance.

Kind regards,

--

david

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