HPE EVA Storage

Brocade 48000 ISL trunk load balancing - one work one not - any ideas?

 
Godfrey Zhang
Advisor

Brocade 48000 ISL trunk load balancing - one work one not - any ideas?

subject:Brocade 48000 ISL trunk load balancing - one work one not - any ideas?

Hi all, I have three directors in one fabric:
Brocade 48K (edge) <==ISL Trunk==> Brocade 48K Core <==ISL trunk==> Brocade 24K (edge)

Brocade 48Ks: OS:6.10b
Brocade 24K: OS:5.3.1a

The ISL trunk between core and 24K_edge has load balancing (port 1/0 - 1/3 - 4 port trunk group):

cscclar48d04:admin> portperfshow 20
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Total
==============================================================================================
slot 1: 28m 27m 12m 15m 0 0 0 0 9.7m 140k 31k 43k 31k 39k 20k 20k 94m


but the ISL trunk between core and 48K_edge has NOT - it always uses the master port (above: port 1/8 - 1/15 - 8 port trunk group).

B48K_CORE's trunkshow:
cscclar48d04:admin> trunkshow
1: 0->127 10:00:00:60:69:e2:16:60 3 deskew 15 MASTER => B24K_DIR2 (24d02)
1->126 10:00:00:60:69:e2:16:60 3 deskew 16
2->125 10:00:00:60:69:e2:16:60 3 deskew 15
3->124 10:00:00:60:69:e2:16:60 3 deskew 16

2: 8-> 8 10:00:00:05:1e:36:5c:34 21 deskew 15 MASTER => B48K_EDGE2 (48d02)
9-> 9 10:00:00:05:1e:36:5c:34 21 deskew 15
10-> 10 10:00:00:05:1e:36:5c:34 21 deskew 15
11-> 11 10:00:00:05:1e:36:5c:34 21 deskew 15
12-> 12 10:00:00:05:1e:36:5c:34 21 deskew 15
13-> 13 10:00:00:05:1e:36:5c:34 21 deskew 15
14-> 14 10:00:00:05:1e:36:5c:34 21 deskew 16
15-> 15 10:00:00:05:1e:36:5c:34 21 deskew 16

B48K ports are 8Gb ports, while B24k ports are 2Gb ports.

I would've thought B48 <==> B48 (8Gb ports on both) should have load balancing, but the reality is not, which hammers the first port all the time. Any ideas?




2 REPLIES 2
KathyL1
Valued Contributor

Re: Brocade 48000 ISL trunk load balancing - one work one not - any ideas?

Have you checked the routing policy on the edge 48K. I'm not certain of this but verify that it is set the same as the core 48K.
"aptpolicy"
Godfrey Zhang
Advisor

Re: Brocade 48000 ISL trunk load balancing - one work one not - any ideas?

run aptpolicy, both 48000s showed "Current Policy: 3 0 (ap) - which is the default - that supports DLS.

run the same command on the 24000, showed "This switch supports only Port Based Routing Policy". run dlsshow --> "DLS is set". This explains the load balancing for this ISL trunking group.

But for the two 48000s, I think as long as a trunk is formed, it should always do the load balancing. Otherwise, there is no point to do so.